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rocky exoplanets are abundant in the galaxy. however, it is still unknown how often, and under what conditions, these small worlds can maintain atmospheres. here we propose to measure thermal emission from the dayside of trappist-1c, a terrestrial exoplanet with temperature similar to that of venus. this planet is the ... | hot take on a cool world: does trappist-1c have an atmosphere? |
a primary science goal of jwst is to understand the atmospheres of other worlds and investigate how a planet's atmospheric composition can inform us about its formation and evolutionary history. of particular interest is the recently-discovered sample of short-period, jupiter-sized planets orbiting m-dwarfs, which pres... | red dwarfs and the seven giants: first insights into the atmospheres of giant exoplanets around m-dwarf stars |
the newly selected venus missions envision and veritas (venus emissivity, radio science, insar, topography, and spectroscopy) by esa and nasa offer new opportunities for studying venus but will also contribute to furthering our knowledge of venus as an exoplanet. hot, rocky planets are favoured exoplanet targets due to... | venus as an exoplanet: effect of varying stellar, orbital, planetary and atmospheric properties upon composition, habitability and detectability |
new terrestrial exoplanets are being discovered at an ever faster pace, and each discovery leads to a widening of our understanding of planetary diversity. a key aspect in the quest to better quantify terrestrial planet diversity is to gain information on plausible bulk compositions, as this physical-chemical quantity ... | exploring the effects of terrestrial exoplanet bulk composition on long-term planetary evolution |
with the new observational capabilities of space telescopes, it should be possible to better characterize the atmospheres of exoplanets, and provide constraints on interiors. ultra hot rocky exoplanets, for which the stellar irradiation may maintain a magma ocean at the surface for a long period of time, are candidates... | evaporation of a magma ocean in presence of hydrogen & observational implications |
organic hazes and atmospheric sulfur gases are likely ubiquitous in planetary atmospheres, including the early earth and exoplanets. our previous work has shown that trace h2s has a significant impact on organic haze chemistry, leading to large increases in haze abundance and changing the physical and chemical properti... | the effect of trace h2s on organic haze optical properties |
the frontier of exoplanetology is being pushed to the identification of earth-sized exoplanets well-suited for detailed characterization with future observatories, notably with jwst. transit searches targeting nearby m-dwarfs are at the forefront of this effort. indeed, the favorable planet-star contrast ratios of m-dw... | search for the transit of a nearby 2 earth-mass planet |
the stellar extreme ultraviolet (euv) irradiation determines the atmospheric properties of exoplanets. recently, by varying the profiles of the euv spectral energy distribution (sed), we tested the influences of stellar euv seds on the physical and chemical properties of the escaping atmosphere (guo & ben-jaffel, 2... | space weather: recovering the variation of the stellar euv spectral energy distribution from the companion exoplanet fuv transit observation |
we propose a program of spitzer transit and secondary eclipse observations for 23 of the 'best of the best' hot giant planets (r > 0.8 jupiters). we focus on planets that are already observed by hst, proposed to be observed by hst, or candiates for jwst early release science observations. our eclipse observations wi... | transits and eclipses of the best of the best: 23 hot jupiters for atmospheric characterization by spitzer, hubble, and jwst |
over the past decade, spitzer has helped to revolutionize our understanding of exoplanet atmospheres. by extending the reach of transmission spectroscopy (change in transit depth with wavelength) past 3 microns, spitzer has provided unique constraints on the composition of the atmospheres of transiting planets. such st... | zodical exoplanets in time: are these worlds flat? |
this project will determine the observing plans needed to retrieve exoplanet atmospheric composition and thermal profiles over a broad range of planets, stars, instruments, and observing modes. characterizing exoplanets is hard. the dim planets orbit bright stars, giving orders of magnitude more relative noise than for... | atmospheric retrievals from exoplanet observations and simulations with bart |
the 200-inch hale telescope at palomar observatory is the largest equatorial-mounted telescope in the world. combining a large aperture, extremely stable tracking, and no differential motion of optics, it introduces low and stable instrument polarization, making it uniquely suited for time-resolved polarimetry. its pri... | wirc-pol: a near-ir spectro-polarimetric imager at palomar observatory |
transit measurements of jovian-sized exoplanetary atmospheres allow one to study the composition of exoplanets, largely independent of the planet’s temperature profile. however, measurements of hot-jupiter transits must archive a level of accuracy in the flux to determine the spectral modulations of the exoplanetary at... | independent component analysis applied to ground-based observations |
this thesis presents theoretical investigations in three areas of astrophysics, all related to radiative processes and interactions between stellar radiation and gaseous media in the universe, ranging from the intergalactic and interstellar medium to planetary atmospheres.part i of the thesis consists of two independen... | radiative processes in astrophysical gases: from the intergalactic and interstellar medium to exoplanetary atmospheres |
primordial hydrogen-helium envelopes surrounding sub-neptune-sized planets are susceptible to mass loss driven by ionizing radiation from their host star. the effect of mass loss is imprinted on observed exoplanet populations in the form of a "photo-evaporation desert" and a "gap" at 1.6 earth radii in the planet radiu... | helium-enhanced planets at the edge of the radius gap |
magellan, nasa's last mission to venus, was the last mission aimed at studying the surface and interior of venus. launched 29 years ago, magellan produced a better global altimetry dataset than was available for the earth at the time, with a footprint size of 12-25 km. global radar imaging was acquired at 125 m pixels.... | high priority decadal survey science from orbit at venus |
envision [1,2] is a venus orbiter mission that will determine the nature and current state of geological activity on venus, and its relationship with the atmosphere, to understand how and why venus and earth evolved so differently. it is a candidate for esa ' s m5 space science mission, with strong nasa participation. ... | envision m5 venus orbiter proposal |
the lack of visible-wavelength albedo measurements for even the best-characterized hot jupiters is a gaping hole in our current understanding of these planets' atmospheres, as the uv+optical albedo spectrum contains a wealth of information about the atmosphere that is unavailable at other wavelengths. rayleigh scatteri... | atmospheric albedos, alkalis, and aerosols of hot jupiters |
the terrestrial cycle of silicate weathering and metamorphic outgassing buffers atmospheric co2 and global climate over geological time on earth. to first order, the operation of this cycle is assumed to occur on earth-like planets in the orbit of other main-sequence stars in the galaxy that exhibit similar continent/o... | the carbonate-silicate cycle on earth-like planets near the end of their habitable lifetimes |
a few of the thousands of discovered exoplanets are solid worlds that may harbor liquid water at their surface. such worlds are promising targets to detect signs of life. the most accessible indications of life are in the gases (like oxygen or methane) that make up a planet's atmosphere. this requires understanding the... | geophysical and geochemical controls on abiotic carbon cycling on earth-like planets |
the terran world spectral simulator (tss) is a flexible software package for modeling direct detection of reflected stellar radiation from earth-similar terrestrial exoplanets. exoplanets similar to earth require more sophisticated simulation tools than planets with optically thick atmospheres, because both the atmosph... | terran world spectral simulator |
e-pytheas is a multidisciplinary project which combines theoretical and experimental work with exoplanet modelling applications. it sits on the frontier between molecular physics, theoretical chemistry and astrophysics. it aims at enhancing our understanding of the radiative properties of hot gaseous media to allow for... | exo-planetary high-temperature hydrocarbons by emission and absorption spectroscopy ({e}-pytheas project) |
nearby, cool dwarfs offer us the unique opportunity to learn more about the atmospheres of planetary-mass bodies. in a new study, hubble observations shed some light on the clouds of one such object.looking for variabilitya false-color image of the ross 458 system. the bright source in the top left is the binary star s... | mapping clouds on a distant world |
dirk van dam (leiden observatory) and dr. matthew kenworthy (leiden observatory) request aavso observer assistance in monitoring the uxor asassn-v j181654.06-202117.6 in an exoplanet/planetary system study. this system was the target of aavso alert notice 710. "a new alert for this star is being sent out because the st... | photometry and spectroscopy requested for uxor asassn-v j181654.06-202117.6 |
recent work has shown that photochemical hazes composed of elemental sulfur and its allotropes may arise in the atmospheres of warm and temperate giant exoplanets due to the photolysis of h2s. we investigate the impact such a haze would have on an exoplanet's geometric albedo spectrum using a suite of established radia... | impact of sulfur hazes on the reflected light spectra of giant exoplanets |
uranus and neptune are vastly different from the other gas giants in the solar system, and represent an increasing population of detected exoplanets, which are smaller than jupiter and larger than earth in both size and mass. their lower temperatures, rotation rate, and higher metallicity lead to a myriad of difference... | focus questions for ice giant atmospheric studies in the next decade |
transit observations reveal that a significant population of the detected exoplanets has hazy atmospheres (sing et al. 2016). although the relative contribution of clouds and photochemical aerosols is not yet fully clarified, the impact of haze particles on the thermal structure could be significant, as such particles ... | impact of photochemical hazes on the thermal structure of exoplanet atmospheres |
the high-luminosity pre-main sequence phase of m dwarfs may limit the habitability of their rocky planets by driving the loss of water in the atmosphere and desiccating the planet. however, water may remain in planetary interiors because high atmospheric surface pressures suppress water outgassing. if the atmospheric s... | delayed water outgassing may enable planetary habitability after an m dwarf's pre-main sequence phase |
studying exoplanets affords us the opportunity to understand the sheer diversity of planets in different physical regimes. we use the two irac bandpasses from the warm spitzer mission and the statistical power of a transit survey to test the theoretical predictions of exoplanet atmosphere properties across a broad regi... | a comprehensive survey of exoplanet atmospheres with spitzer/irac |
the hubble space telescope"s wide field camera 3 (wfc3) has been widely used for transmission and emission spectroscopy of exoplanet atmospheres, identifying the main molecular constituents, detecting the presence of clouds and probing their thermal structure. hubble observations of the emission spectra of a number of ... | characterising two ultra-hot jupiters with the hubble space telescope |
thanks to the advances in modern instrumentation we learned about many exoplanets that spawn a wide range of masses and composition. studying their atmospheres provides insight into planetary diversity, origin, evolution, dynamics, and habitability. present and future observing facilities will address these important t... | remote sensing of exoplanetary atmospheres with ground-based high resolution near-infrared spectroscopy |
high-resolution spectroscopy is used to detect and characterise the atmospheres of transiting planets, giving us information about their chemical composition, temperature profiles, and the presence of clouds and winds, mainly in hot, giant planets. state-of-the-art instrumentation is pushing the precision of our measur... | constraining the presence of water and clouds on wasp-166 b: a bloated planet in the neptune desert |
the detection of planetary auroral radio emission is the only method to unambiguously observe exoplanetary magnetic fields. over the past few decades, a number of observational campaigns searching for exoplanetary radio emission have been performed and none have been successful. observations of an exoplanet's magnetic ... | the search for radio emission from the exoplanetary systems 55 cnc, upsilon andromedae, and tau boötis using lofar beam-formed observations |
the field of exoplanets has been experiencing rapid growth alongside the technological advances that have been made since exoplanets were first discovered in the 1990's. more than 4,050 exoplanets have been confirmed, and that number will only continue to grow. several of these exoplanets have had their upper atmospher... | characterizing trends in the atmospheres of exoplanets |
planet formation models suggest broad compositional diversity in the super-earth to sub-neptune regime, with a high likelihood for large atmospheric metal content (100-1000xsolar). with this comes the prevalence of numerous plausible bulk atmospheric constituents including h2o, co, co2, ch4, and n2. given this composit... | composition dependent molecular opacity database for high-metallicity exoplanet atmospheres |
aerosols are common in the atmospheres of exoplanets across a wide swath of temperatures, masses, and ages. these aerosols strongly impact observations of transmitted, reflected, and emitted light from exoplanets, obfuscating our understanding of exoplanet thermal structure and composition. a variety of substances have... | a unified picture of giant exoplanet cloudiness: the dominance of silicates and photochemical hazes |
the external supply of gas to planetary atmospheres may be important to set their final compositions. in this talk, i will summarize recent works that quantified in an exoplanetary context, how much gas can be delivered to planets from late gas disks, which appear to be rather ubiquitous around main-sequence stars with... | the effect of late gas disks on the late stages of planet formation |
as of february 2022, over 4900 exoplanets have been confirmed. in this study, we conducted statistical analyses on both the exoplanets and their host stars' parameters. our findings suggest that the radius and true mass distribution of the exoplanets remain largely unchanged compared to prior research. however, we obse... | statistical and radio analysis of exoplanets and their host stars |
launched on 18 december 2019, cheops (characterising exoplanet satellite) is the first exoplanet mission dedicated to the search for transits of exoplanets by means of ultrahigh precision photometry of bright stars already known to host planets. it is the first s-(small) class mission in esa"s cosmic vision 2015-2025, ... | the cheops guaranteed time observing programme |
we study the red-optical photometry of the ultra-hot jupiter wasp-121b as observed by the transiting exoplanet survey satellite (tess) and model its atmosphere through a radiative transfer simulation. given its short orbital period of ~1.275 days, inflated state and bright host star, wasp-121b is exceptionally favorabl... | tess observations of the wasp-121b phase curve |
in the framework of the priority programme "exploring the diversity of extrasolar planets" (spp 1992) of the german research foundation (dfg) we carried out the project "the key physical-chemical processes determining the composition and temperature of (exo)planetary atmospheres". characterizing the atmospheres of extr... | investigating physical and chemical mechanisms in planetary atmospheres and their impacts on the observables |
atmospheres are important potentially observable features of exoplanets. their composition can provide evidence for biological activity (i.e., a biosignature) and provide information about other planetary processes and events. models of exoplanetary atmospheres will assist in the understanding of observations, but thes... | predicting planetary atmospheric chemical reaction rates using machine learning |
small planets (1-3.9 rearth) constitute more than half of the inventory of the 4000-plus exoplanets discovered so far. smaller planets are sufficiently dense to be rocky, but those with radii larger than 1.6 rearth are thought to display in many cases hydrogen/helium gaseous envelopes up to 30% of the planetary mass. t... | are sub-neptunes irradiated ocean planets? |
low-mass planets (sub-neptunes and super-earths) are the most common types of exoplanets with periods less than 100 days. their radii suggest a bimodal distribution with most planets larger than 1.6-2 earth radii maintaining a h/he envelope; a conclusion derived from their less than rocky densities. however, compositio... | observational perspective on linking sub-neptune atmospheric measurements to planet formation |
evaporitic environments with halite deposits are common near the surface of both earth and mars. on earth, they are known to harbor stratified communities of phototropic microorganisms which harness solar energy and resemble ancient fossilized stromatolites (1). the evolution of photopigments for phototrophy and photop... | haloarchaeal photopigments and lipids on earth and potentially elsewhere |
the past thermal history of earth's interior is used as a representative case for a range of possible past states and evolution of the mantles of earth-like exoplanets. from the computation of melt generation and volcanism, the volatile delivery of volatiles from the mantle into the atmosphere is estimated. this produc... | climate evolution of earth and earth-like (exo)planets affected by volcanic outgassing: insights from 3d modelling. |
the james webb space telescope (jwst) will provide unprecedented spectroscopic observations of extrasolar planets, including mid-infrared spectra using miri. many target objects at these wavelengths will be giant planets observed by direct imaging. however, the techniques to analyze these spectra have not yet been expl... | mid-infrared brown dwarf spectroscopy as a model for giant exoplanets |
existing atmospheric models for hot transiting exoplanets can be classified into two general groups: chemical-equilibrium and chemical-kinetics. chemical-equilibrium models assume thermochemical equilibrium, and seek to minimize the gibbs free energy, δg, of the system and do not require a knowledge of its chemical pat... | improving atmospheric models for hot jupiters and sub-neptunes with new ab initio reaction rates |
little experimental work has been done to explore the properties of photochemical hazes formed in exoplanets, despite their role in atmospheric chemistry and their subsequent possible impact on observations. i will present results of the composition of haze particles produced from exoplanet laboratory studies in the jh... | chemistry of temperate exoplanet hazes from the laboratory |
sub-neptunes (radii of 1.25-4 earth radius) remain the most commonly detected exoplanets to date. however, it remains difficult for observations to directly "see" whether these intermediate-sized exoplanets have surfaces and where their surfaces are located. here we propose a new technique that uses solely the abundanc... | how to identify exoplanet surfaces: without directly seeing them? |
the kepler mission has shown that the most abundant types of planets are super-earths and mini-neptunes among ~3500 confirmed exoplanets, and these types of exoplanets are expected to exhibit a wide variety of atmospheric compositions. recent transit spectra have demonstrated that clouds and/or hazes could play a signi... | laboratory simulations on haze formation in cool exoplanet atmospheres |
many earth-sized planets have been discovered and some appear to lie in the habitable zone. moreover, several earth-sized planets were recently detected around low temperature stars near the solar system. however, it is difficult to characterize them as earth-like or venus-like because we have no information on their a... | development of the uvspex for the wso-uv to detect exoplanetary exospheric hydrogen and oxygen |
the last decade has witnessed a revolution in our understanding of exoplanets through the procurement of exquisite spectroscopic observations of their atmospheres. such observations are routinely interpreted by retrieval tools, frameworks in which an atmospheric model is coupled with an optimization algorithm. atmosphe... | considerations for next-generation retrievals of exoplanetary transmission spectra |
saturn's moon titan receives volatiles into the top of its atmosphere — including atomic oxygen — sourced from cryovolcanoes on enceladus. similar types of material exchange amongst exoplanets could cause the abiotic formation of biogenic gases such as oxygen and ozone that might otherwise be considered potential biosi... | influx of water and oxygen into terrestrial atmospheres and the impact on false-positive biosignatures |
photochemical hazes are expected to be present in exoplanet atmospheres with quantities spanning a large range of values, from quasi-non-detectable traces in clear atmospheres, to large amounts dramatically modifying their environment. our purpose is to determine the properties of these haze particles in hot- jupiters'... | study of photochemical hazes in exoplanet atmospheres: disequilibrium chemistry effects and haze feedback |
traditional habitable zone theory assumes that the silicate-weathering feedback regulates the atmospheric co2 of planets within the habitable zone to maintain surface temperatures that allow for liquid water. there is some non-definitive evidence that this feedback has worked in earth history, but it is untested in an ... | a statistical test for the habitable zone concept |
hot rocky exoplanets with equilibrium temperatures above about 2000 k (e.g. 55 cnc e, k2-141 b, and gj 367 b) are thought that have molten surfaces. this implies that there is a direct interface between the planet's lava ocean and atmosphere. hence, the composition of these planet's atmospheres is likely to be closely ... | modeling silicate atmospheres on hot rocky exoplanets |
the modelling of the internal structures of super-earths and sub-neptunes gives a valuable insight into their formation history and possible atmospheres. we present a planet model where the interior is coupled with the atmosphere within a bayesian retrieval scheme. we take into account water in all its possible phases,... | characterising the interior structures and atmospheres of transiting super-earths and sub-neptunes |
the last decade has brought us a wealth of exoplanet detections from facilities both on the ground and in space. closely on the heels of these exoplanet detections have been attempts to probe their atmospheres to measure their compositions and thermal structures in concert with the development of ever more sophisticate... | into the era of exoplanet atmospheric characterization |
photonic spectrographs offer a highly miniaturized, flexible, and stable on-chip solution for astronomical spectroscopy and can be used for various science cases such as determining the atmospheric composition of exoplanets to understand their habitability, formation, and evolution. arrayed waveguide gratings (awgs) ha... | simulating the study of exoplanets using photonic spectrographs |
recent exoplanet observations reveal hazy atmospheres, coming as no surprise due to the prevalence of photochemical hazes in our solar system on bodies like titan. photolysis of titan's n2-ch4 atmosphere produces complex organic aerosols that influence atmospheric composition as well as supply material to the surface. ... | exoplanet hazes and their interactions with liquid surface water |
the purpose of this review is to address the following question: using our knowledge of infrared planetary spectroscopy, what can we learn about the exoplanets' atmospheres? in a first part, a simplified classification of exoplanets is shown, based on their masses and their equilibrium temperatures, and assuming thermo... | from solar system planets to exoplanets: what can we learn from planetary spectroscopy? |
ariel (atmospheric remote-sensing infrared large-survey) is a medium-class mission of the european space agency, part of the cosmic vision program, whose launch is foreseen by early 2029. ariel aims to study the composition of exoplanet atmospheres, their formation and evolution. the ariel's target will be a sample of ... | the instrument control unit of the ariel payload: design evolution following the unit and payload subsystems srr (system requirements review) |
the optical constants database (ocdb.smce.nasa.gov) came online in february 2023 and provides complex refractive indices of laboratory-generated organic refractory materials and ices relevant to (exo)planetary and astrophysical environments. the goal of the ocdb is to centralize published optical constants data to faci... | on the new optical constants database (ocdb) and its importance for the interpretation of observational data |
as the effects of climate change become more apparent in many parts of the world, and as more diverse exoplanets are discovered through improved observational techniques, venus is becoming increasingly important to science as a nearby observable planet with a different environment from that of earth. with this backgrou... | mission study status of venus explorer succeeding akatsuki |
clouds and hazes appear to be ubiquitous features of exoplanetary atmospheres, and their presence has stark consequences on the light scattering properties and radiative balance of these atmospheres. exoplanet clouds are typically inferred from muted transmission spectra, as optically thick clouds at the terminator kee... | light scattering and polarization of warm sub-neptune cloud analogs in the laboratory |
aerosols are a ubiquitous feature of exoplanet atmospheres, sometimes obscuring the spectral determination of atmospheric gas composition. aerosol composition is usually determined from models of nucleation rates for condensable species in an atmosphere of a given composition. for hot jupiters, condensable species incl... | measurement of nanoparticle surface energies with application to nucleation and condensation in exoplanet atmospheres |
eclipse observations provide spatial information of the temperature structures on the exoplanets' daysides. spectroscopic eclipse observations of sufficient quality, like those possible with jwst, enable 3d exoplanet atmosphere characterization, as each wavelength probes a different depth at each horizontal location on... | the first 3d eclipse map of an exoplanet |
we present theoretical transmission spectra of the planets trappist-1d, e, f, and g using a version of the caltech inverse modeling and retrieval algorithms (chimera) atmospheric modeling code. we use particle size, aerosol production rates, and aerosol composition inputs from recent laboratory experiments relevant for... | modeling exoplanetary haze and cloud effects for transmission spectroscopy in the trappist-1 system |
i study the structure, composition and dynamic evolution of directly imaged exoplanet and brown dwarf atmospheres, using spectrophotometric data collected from a range of ground and space based instrumentation. as part of my dissertation, i led studies exploring the atmospheres of brown dwarfs to search for weather var... | exoplanet meteorology: characterizing the atmospheres of directly imaged sub-stellar objects |
identifying an earth-like exoplanet from atmospheric spectra is a challenging task, particularly given that the composition of a planet's atmosphere is the result of dynamic interactions between both interior and surface processes. here, we present experimental results using the laser heated diamond anvil cell that add... | atmospheric nitrogen as an indicator of an oxidized mantle composition in rocky exoplanets |
the radii of 4000+ confirmed/candidate exoplanets have been precisely measured by the kepler mission, along with their orbital periods. their radii show a bi-modal distribution, with two peaks corresponding to smaller planets (likely rocky) and larger intermediate-sized planets, respectively. their masses can be determ... | growth model interpretation of planet size distribution |
chemical compositions of exoplanetary atmospheres are the key for biosignature detection. an exoplanet is potentially habitable if its atmosphere includes oxygen, ozone, and methane. ozone has a strong absorption band near 9.6 μm. detection of this absorption band helps us confirm the existence of oxygen and hence the ... | the ozone layer over tidally locked exoplanets around m dwarfs |
detecting life on a terrestrial exoplanet will require understanding how elements such as carbon are abiotically cycled among its subsurface, surface, and atmosphere to identify any deviations due to biology. here, we report insights gained from building a model of abiotic carbon cycling on lifeless planets that differ... | effect of planetary redox conditions on key carbon cycling processes |
a new generation of extreme matter experiments is underway, recreating conditions that exist deep inside stars, sub-stellar objects (e.g., brown dwarfs), and planets, and creating dense plasma and revolutionary material states not previously imagined. exquisite pressure-temperature control can now bring atoms together ... | matter at extreme energy density: exotic solids to inertial fusion |
the search for habitable earth-size exoplanets, or "earth-twins" has led to the discovery of number of candidates. most of these candidates have been found in the habitable zone (hz) of m-dwarf stars, due to the observational constrain that only short-period small planets can be detected with our current instruments. d... | extending the definition of planet habitability to include space environment factors |
putative natural massive satellites (exomoons) has gained increasing attention, where they orbit jupiter-like planets within the habitable zone of their host main sequence star. an exomoon is expected to move within the equatorial plane of its host planet, with its spin ${\boldsymbol s}_\mathrm{s}$ aligned with its orb... | the effect of post-newtonian spin precessions on the evolution of exomoons' obliquity |
putative natural massive satellites (exomoons) have gained increasing attention when they orbit jupiter-like planets within the habitable zone of their host main-sequence star s. an exomoon s is expected to move within the equatorial plane of its host planet p, with its spin s s aligned with its orbital angular momentu... | the effect of post-newtonian spin precessions on the evolution of exomoons' obliquity |
occultation light curves of exomoons may give information on the exomoons' albedo and hence indicate the presence of ice cover on the surface. icy moons might have subsurface oceans, and thus may potentially be habitable. the objective of our paper is to determine whether next generation telescopes will be capable of a... | possibility for albedo estimation of exomoons: why should we care about m dwarfs? |
in the last 20 years, numerous exoplanets have been discovered and it has become clear that habitable bodies are rare. exomoons mark the next stage in identifying habitable environs. in our own solar system, several moons have been identified as having features suitable to sustain life. the trappist-1 system (gillon et... | stability of moons in the trappist-1 system |
the focus of my presentation is to evaluate the prospect of habitability in binary and higher-order systems. besides the standard case of single stars, planets have also been identified in binary systems, both regarding s-type and p-type orbits, as well as in a decent number of triple and quadruple stellar systems. pre... | habitability of planets and moons in binary and higher order systems |
m dwarfs host most of the exoplanets in the local milky way. some of these planets, ranging from sub-earths to super-jupiters, orbit in their stars' habitable zones (hzs), although many likely possess surface environments that preclude habitability. moreover, exomoons around these planets could harbor life for long tim... | vizier online data catalog: compilation of planets around m dwarfs (martinez-rodriguez+, 2019) |
the colors of extraterrestrial surfaces orbiting around other stars will be within the scope of future large space-based telescope designs, such as the large ultraviolet optical infrared surveyor (luvoir) (e.g., kouveliotou et al., 2014) and the habitable exoplanet observatory (habex) (e.g., mennesson et al., 2016). bi... | color catalogue of life in ice: surface biosignatures on icy worlds |
the author regrets that equation (14) was not corrected in the proofs and 3 brackets have been omitted and an extra factor added. | corrigendum to 'limits on the orbits of possible exomoons around kepler giant planets in the habitable zone' [planetary and space science volume 192 (2020) 105033] |
in this talk, i will present a new analytical formulation to model the lightcurves for a transiting system with exomoons. i will also talk about the detectability and atmospheric characterization of such exomoons using jwst. | detection and characterization of habitable exomoons in the jwst era |
while giant planets themselves are not what we ideally look for when it comes to planets in the habitable zone (hz) of their stars, they have the potential of hosting exomoons that could be potentially life holding worlds. indeed in a recent study we found that while giant planets (>3 earth radii) are less likely to... | exploring giant planets and exomoons in the habitable zone |
the hd 45364 system hosts two giant planets orbiting in a 3:2 mean motion resonance and was the first exoplanetary system observed to exhibit such an orbital configuration. the interesting dynamics between the two planets and their presence within the system habitable zone (hz) prompt studies into the formation and evo... | dynamics and habitability in the hd 45364 planetary system |
the detection and characterization of the exomoon population would open the door to a new field within exoplanetary science. we present the prospects for the james webb and the nancy grace roman space telescopes (jwst & roman) to detect exomoons transiting isolated planetary-mass objects (ipmos — also known as free... | prospects for the detection of exomoons transiting planetary mass objects with infrared space-based observatories |
exoplanets that transit nearby small stars present the best opportunity for future atmospheric studies with the james webb space telescope and the ground based elts currently under construction. the mearth project has discovered a rocky planet with a period of 27.43 days residing in the habitable zone of the nearby ina... | a search for exomoons and ttvs from lhs 1140b, a nearby super-earth orbiting in the habitable-zone of an m dwarf |
kepler 452b, also nicknamed earth’s cousin, was discovered orbiting the habitable zone (hz) of a g2 star (jenkins et al. 2015). this exoplanet is considered a super earth, with a mass of 5 ± 2 mass of earth and a radius of 1.11 radius of earth; and is arguably the first rocky, habitable exoplanet to orbit a sun-like st... | stable orbits for exomoons in earth’s cousin (kepler-452b) orbiting a sun-like star |
the potential discovery of exomoons is important, as they could provide constraints on their host planets’ formation, and large exomoons may represent potentially habitable environments. detection of exomoons is extremely challenging. however, upper limits on exomoon masses have now been determined for a few dozen plan... | on the expected properties of exomoons |
the discovery of giant exoplanets in habitable zones has raised the question of how common large habitable exomoons really are in the universe. several detection techniques for exomoons have been developed; however their effectiveness depends largely on the exomoon’s size. it is commonly believed that large exomoons ar... | exomoon capture in the restricted 3-body problem and the role of torque in mechanical energy transfer |
kepler 452b, also nicknamed earth's cousin, was discovered orbiting the habitable zone (hz) of a g2 star. this exoplanet is considered a super earth, with a mass of 5 +/-2 m ⊕ and a radius of 1.11 r ⊕ and is arguably the first rocky, habitable exoplanet to orbit a sun-like star. with a period of 385 days, conditions ar... | stable orbits for exomoons in earth's cousin (kepler-452b) orbiting a sun-like star |
last october, the first discovery of a potential exomoon was announced. but is kepler-1625b-i an actual moon in another solar system? or just an artifact of data reduction?a tricky businessartists depiction of an earth-like exomoon orbiting a gas-giant planet. [nasa/jpl-caltech]moons are a useful diagnostic they can pr... | exomoon, or no exomoon? |
kepler 452b, also nicknamed earth's cousin, was discovered orbiting the habitable zone (hz) of a g2 star (jenkins et al. 2015). this exoplanet is considered a super earth, with a mass of 5 +/-2 mass of earth and a radius of 1.11 radius of earth; and is arguably the first rocky, habitable exoplanet to orbit a sun-like s... | stable orbits for exomoons in earth's cousin (kepler-452b) orbiting a sun-like star |
the second data release of the gaia mission (gaia dr2) brought with it updated distances, luminosities, and radii of 1.6 billion stars. a small portion of these stars are hosts to known exoplanets. here, we report the calculation of revised radii and densities for 320 non-kepler exoplanets using these new data and pres... | revised exoplanet radii and habitability using gaia data release 2 |
the solar system objects with atmospheres have been studied with dedicated space missions since the beginning of the space exploration age. earth's close neighbours, venus and mars have in particular been privileged targets of space missions, most recently with esa's venus express and mars express and with nasa's mars ... | atmospheric studies by space missions in the solar system and beyond |
plato is the third medium-class mission in esa's cosmic vision programme. plato will combine the detection and characterisation of exoplanets with the study of their host stars, focusing on terrestrial planets orbiting in the habitable zone of solar-like stars. thanks to the brightness of its core targets (v < 11), ... | the plato space mission: revealing habitable worlds |
while the search for exoplanets has been focused primarily on trying to find earth like planets, there have been discoveries of many different worlds that have caused us to revise our ideas as to what could be a potentially habitable planet. interestingly a significant number of giant exoplanets (>3 earth radii) hav... | exploring giant planets & exomoons in the habitable zone. |
while the search for exoplanets harvests an increasing interest, the times of exomoon detection and characterization are still to come. as those found in our solar system, exomoons are potential candidates for hosting extraterrestrial life and/or granting their parent exoplanet with the required habitability conditions... | impact of exomoons in flux and polarization phase curves of starlight reflected by exoplanets |
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