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New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b,
WASP-3 b, and XO-2 b: We present new transit observations acquired between 2014 and 2018 for the
hot exoplanets GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b. New
mid-transit times extend the timespan covered by observations of these
exoplan... | astro-ph_EP |
The role of the general relativity on icy body reservoirs under the
effects of an inner eccentric Jupiter: Recent studies have analyzed the dynamical evolution of outer small body
populations under the effects of an eccentric inner massive perturber. Such
outer reservoirs are composed of particles on prograde and ret... | astro-ph_EP |
Properties of CO$_2$ clathrate hydrates formed in the presence of
MgSO$_4$ solutions with implications for icy moons: There is evidence to suggest that clathrate hydrates have a significant
effect on the surface geology of icy bodies in the Solar System. However the
aqueous environments believed to be present on thes... | astro-ph_EP |
A Bayesian Analysis of Technological Intelligence in Land and Oceans: Current research indicates that (sub)surface ocean worlds essentially devoid
of subaerial landmasses (e.g., continents) are common in the Milky Way, and
that these worlds could host habitable conditions, thence raising the
possibility that life and t... | astro-ph_EP |
RISTRETTO: high-resolution spectroscopy at the diffraction limit of the
VLT: RISTRETTO is a visible high-resolution spectrograph fed by an extreme
adaptive optics (XAO) system, to be proposed as a visitor instrument on ESO
VLT. The main science goal of RISTRETTO is the detection and atmospheric
characterization of ex... | astro-ph_EP |
Titan organic aerosols: molecular composition and structure of
laboratory analogues inferred from systematic pyrolysis gas chromatography
mass spectrometry analysis: Numerous studies have been carried out to characterize the chemical
composition of laboratory analogues of Titan aerosols (tholins), but their
molecul... | astro-ph_EP |
Atmospheres as a Window to Rocky Exoplanet Surfaces: As the characterization of exoplanet atmospheres proceeds, providing insights
into atmospheric chemistry and composition, a key question is how much deeper
into the planet we might be able to see from its atmospheric properties alone.
For small planets with modest at... | astro-ph_EP |
On the Low False Positive Probabilities of Kepler Planet Candidates: We present a framework to conservatively estimate the probability that any
particular planet-like transit signal observed by the Kepler mission is in fact
a planet, prior to any ground-based follow-up efforts. We use Monte Carlo
methods based on stell... | astro-ph_EP |
Bayesian Model Testing of Ellipsoidal Variations on Stars due to Hot
Jupiters: A massive planet closely orbiting its host star creates tidal forces that
distort the typically spherical stellar surface. These distortions, known as
ellipsoidal variations, result in changes in the photometric flux emitted by
the star, w... | astro-ph_EP |
Marginalising instrument systematics in HST WFC3 transit lightcurves: Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) infrared observations
at 1.1-1.7$\mu$m probe primarily the H$_2$O absorption band at 1.4$\mu$m, and
has provided low resolution transmission spectra for a wide range of
exoplanets. We present th... | astro-ph_EP |
Lunar eclipse induces disturbance in the lunar exosphere: Given the renewed scientific interest in lunar exploration missions, complete
understanding of lunar near surface environment and its exosphere under
different conditions is of paramount importance. Lunar exosphere has been
extensively studied by ground based ob... | astro-ph_EP |
Differences in the gas and dust distribution in the transitional disk of
a sun-like young star, PDS 70: We present ALMA 0.87 mm continuum, HCO+ J=4--3 emission line, and CO J=3--2
emission line data of the disk of material around the young, Sun-like star PDS
70. These data reveal the existence of a possible two compo... | astro-ph_EP |
No evidence for radius inflation in hot Jupiters from vertical advection
of heat: Understanding the radiative-dynamical coupling between upper photosphere and
deeper atmosphere is a key in understanding the abnormal large radii of hot
Jupiters. One needs very long integration times of 3D general circulation
models (G... | astro-ph_EP |
First Near-IR Spectroscopic Survey of Neptune Trojans with JWST:
Distinct Surface Compositions of Red vs Ultra-Red Neptune Trojans: Neptune's Trojan asteroids have been observed to have a variety of optical
colors, most notably red (g $-$ r < 0.75) vs. ultra-red (g $-$ r > 0.75), but
the underlying cause of these dif... | astro-ph_EP |
ExoMol line lists IV: The rotation-vibration spectrum of methane up to
1500 K: A new hot line list is calculated for $^{12}$CH$_4$ in its ground electronic
state. This line list, called 10to10, contains 9.8 billion transitions and
should be complete for temperatures up to 1500 K. It covers the wavelengths
longer than... | astro-ph_EP |
Asteroid models from generalised projections: Essential facts for
asteroid modellers and geometric inverse problem solvers: We present a review of the problem of asteroid shape and spin reconstruction
from generalised projections; i.e., from lightcurves, disk-resolved images,
occultation silhouettes, radar range-Dopp... | astro-ph_EP |
Trajectory Optimisation of a Swarm Orbiting 67P/Churyumov-Gerasimenko
Maximising Gravitational Signal: Proper modelling of the gravitational fields of irregularly shaped asteroids
and comets is an essential yet challenging part of any spacecraft visit and
flyby to these bodies. Accurate density representations provid... | astro-ph_EP |
Sub-Saturn Planet MOA-2008-BLG-310Lb: Likely To Be In The Galactic Bulge: We report the detection of sub-Saturn-mass planet MOA-2008-BLG-310Lb and
argue that it is the strongest candidate yet for a bulge planet. Deviations
from the single-lens fit are smoothed out by finite-source effects and so are
not immediately app... | astro-ph_EP |
Efficient Follow-Up of Exoplanet Transits Using Small Telescopes: This paper is to introduce an online tool for the prediction of exoplanet
transit light curves. Small telescopes can readily capture exoplanet transits
under good weather conditions when the combination of a bright star and a large
transiting exoplanet r... | astro-ph_EP |
Long-Term Stability of Tightly Packed Multi-Planet Systems in Prograde,
Coplanar, Circumstellar Orbits within the $α$ Centauri AB System: We perform long-term simulations, up to ten billion years, of closely-spaced
configurations of 2 -- 6 planets, each as massive as the Earth, traveling on
nested orbits about either... | astro-ph_EP |
The Magellan PFS Planet Search Program: Radial Velocity and Stellar
Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B: We present a new precision radial velocity (RV) dataset that reveals multiple
planets orbiting the stars in the $\sim$360 AU, G2$+$G2 "twin" binary HD
133131AB. Our 6 years o... | astro-ph_EP |
TOI-222: a single-transit TESS candidate revealed to be a 34-day
eclipsing binary with CORALIE, EulerCam and NGTS: We report the period, eccentricity, and mass determination for the TESS
single-transit event candidate TOI-222, which displayed a single 3000 ppm
transit in the TESS two-minute cadence data from Sector 2... | astro-ph_EP |
An ultra-short period rocky super-Earth orbiting the G2-star HD 80653: Ultra-short period (USP) planets are a class of exoplanets with periods
shorter than one day. The origin of this sub-population of planets is still
unclear, with different formation scenarios highly dependent on the composition
of the USP planets. A... | astro-ph_EP |
KMT-2018-BLG-1990Lb: A Nearby Jovian Planet From A Low-Cadence
Microlensing Field: We report the discovery and characterization of KMT-2018-BLG-1990Lb, a Jovian
planet $(m_p=0.57_{-0.25}^{+0.79}\,M_J)$ orbiting a late M dwarf
$(M=0.14_{-0.06}^{+0.20}\,M_\odot)$, at a distance
$(D_L=1.23_{-0.43}^{+1.06}\,\kpc)$, and p... | astro-ph_EP |
Correction to: Effect of the rotation and tidal dissipation history of
stars on the evolution of close-in planets: This is an erratum for the publication Bolmont & Mathis 2016 (Celestial
Mechanics and Dynamical Astronomy, 126, 275-296,
https://doi.org/10.1007/s10569-016-9690-3). There was a small mistake for the
spin... | astro-ph_EP |
Asteroid Surface Geophysics: The regolith-covered surfaces of asteroids preserve records of geophysical
processes that have occurred both at their surfaces and sometimes also in their
interiors. As a result of the unique micro-gravity environment that these
bodies posses, a complex and varied geophysics has given birth... | astro-ph_EP |
Circumbinary Chaos: Using Pluto's Newest Moon to Constrain the Masses of
Nix & Hydra: The Pluto system provides a unique local laboratory for the study of binaries
with multiple low mass companions. In this paper, we study the orbital
stability of P4, the most recently discovered moon in the Pluto system. This
newfou... | astro-ph_EP |
Spin and orbital dynamics of planets undergoing thermal atmospheric
tides using a vectorial approach: Earth-mass planets are expected to have atmospheres and experience thermal
tides raised by the host star. These tides transfer energy to the planet that
can counter the dissipation from bodily tides. Indeed, even a r... | astro-ph_EP |
Long-term Orbital Period Variation of Hot Jupiters from Transiting Time
Analysis using TESS Survey Data: Many hot Jupiters may experience orbital decays, which are manifested as
long-term transit timing variations. We have analyzed 7068 transits from the
Transiting Exoplanet Survey Satellite (TESS) for a sample of 32... | astro-ph_EP |
Breakup of the Synchronous State of Binary Asteroid Systems: This paper continues the authors' previous work and presents a coplanar
averaged ellipsoid-ellipsoid model of synchronous binary asteroid system (BAS)
plus thermal and tidal effects. Using this model, we analyze the breakup
mechanism of the synchronous BAS. D... | astro-ph_EP |
A condensed matter analogy of impact crater formation: Impact craters exist on various solid objects in the planetary system. A
simplified analogy of the process of their formation is here analyzed by
standard solid state physics and the so called dynamic quantized fracture
mechanics. An expression which links the crat... | astro-ph_EP |
Structure, variability, and origin of the low-latitude nightglow
continuum between 300 and 1,800 nm: Evidence for HO$_2$ emission in the
near-infrared: The Earth's mesopause region between about 75 and 105 km is characterised by
chemiluminescent emission from various lines of different molecules and atoms.
This emi... | astro-ph_EP |
Monitoring polarization in comet 46P/Wirtanen: We measure the degree of linear polarization of comet 46P/Wirtanen during two
months, embracing the perihelion passage in 2018 December with phase angles
ranging from {\alpha}=18.1 to 46.4 deg. The polarimetric response PQ obtained
resembles what was previously found in co... | astro-ph_EP |
Detection Efficiency of Asteroid Surveys: A comprehensive characterization of the detection efficiency of nine of the
major asteroid surveys that have been active over the past two decades is
presented. The detection efficiency is estimated on a nightly basis by
comparing the detected asteroids with the complete catalo... | astro-ph_EP |
On possible types of magnetospheres of hot Jupiters: We show that the orbits of exoplanets of the "hot Jupiter" type, as a rule,
are located close to the Alf\'{v}en point of the stellar wind of the parent
star. At this, many hot Jupiters can be located in the sub-Alf\'{v}en zone in
which the magnetic pressure of the st... | astro-ph_EP |
Solid accretion onto planetary cores in radiative disks: The solid accretion rate, necessary to grow gas giant planetary cores within
the disk lifetime, has been a major constraint for theories of planet
formation. We tested the solid accretion rate efficiency on planetary cores of
different masses embedded in their bi... | astro-ph_EP |
Combining Gaia and GRAVITY: Characterising Five New Directly Detected
Substellar Companions: Precise mass constraints are vital for the characterisation of brown dwarfs
and exoplanets. Here, we present how the combination of data obtained by Gaia
and GRAVITY can help enlarge the sample of substellar companions with m... | astro-ph_EP |
Valence-shell photoionization of chlorine-like Ar$^{+}$ ions: Absolute cross-section measurements for valence-shell photoionization of
Ar$^{+}$ ions are reported for photon energies ranging from 27.4 eV to 60.0 eV.
The data, taken by merging beams of ions and synchrotron radiation at a photon
energy resolution of 10 me... | astro-ph_EP |
Debris Disks in Multi-Planet Systems: Are Our Inferences Compromised by
Unseen Planets?: Resolved debris disk features (e.g., warps, offsets, edges and gaps,
azimuthal asymmetries, radially thickened rings, scale heights) contain
valuable information about the underlying planetary systems, such as the
posited planet'... | astro-ph_EP |
A new statistical method for characterizing the atmospheres of
extrasolar planets: By detecting light from extrasolar planets,we can measure their compositions
and bulk physical properties. The technologies used to make these measurements
are still in their infancy, and a lack of self-consistency suggests that
previo... | astro-ph_EP |
Computing Apparent Planetary Magnitudes for The Astronomical Almanac: Improved equations for computing planetary magnitudes are reported. These
formulas model V-band observations acquired from the time of the earliest
filter photometry in the 1950s up to the present era. The new equations
incorporate several terms that... | astro-ph_EP |
Modeling the Historical Flux of Planetary Impactors: The impact cratering record of the Moon and the terrestrial planets provides
important clues about the formation and evolution of the Solar System.
Especially intriguing is the epoch 3.8-3.9 Gyr ago (Ga), known as the Late
Heavy Bombardment (LHB), when the youngest l... | astro-ph_EP |
HAT-P-42b and HAT-P-43b. Two Inflated Transiting Hot Jupiters from the
HATNet Survey: First identified from the HATNet wide-field photometric survey, these
candidate transiting planets were then followed-up with a variety of
photometric observations. Determining the planetary nature of the objects and
characterizing ... | astro-ph_EP |
Capture of exocomets and the erosion of the Oort cloud due to stellar
encounters in the Galaxy: The Oort cloud (OC) probably formed more than 4$\,$Gyr ago and has been
moving with the Sun in the Galaxy since, exposed to external influences, most
prominently to the Galactic tide and passing field stars. Theories sugge... | astro-ph_EP |
Dynamics of Colombo's Top: Generating Exoplanet Obliquities from
Planet-Disk Interactions: Large planetary spin-orbit misalignments (obliquities) may strongly influence
atmospheric circulation and tidal heating in the planet. A promising avenue to
generate obliquities is via spin-orbit resonances, where the spin and ... | astro-ph_EP |
Chemically defining the building blocks of the Earth: Chondrites are undifferentiated sediments of material left over from the
earliest solar system and are widely considered as representatives of the
unprocessed building blocks of the terrestrial planets. The chondrites, along
with processed igneous meteorites, have b... | astro-ph_EP |
Mass transfer between debris discs during close stellar encounters: We study mass transfers between debris discs during stellar encounters. We
carried out numerical simulations of close flybys of two stars, one of which
has a disc of planetesimals represented by test particles. We explored the
parameter space of the en... | astro-ph_EP |
The architecture of multi-planet systems as a tracer of their formation
mechanisms: Exoplanets observed by the {\it Kepler} telescope exhibit a bi-modal, radius
distribution, which is known as the radius gap. We explore an origin of the
radius gap, focusing on multi-planet systems. Our simple theoretical argument
pre... | astro-ph_EP |
Activity of (2060) Chiron possibly caused by impacts?: The centaur 95P/(2060) Chiron is showing comet-like activity since its
discovery, but the mass-loss mechanisms triggering its activity remained
unexplained. Although the collision rates in the centaur region are expected to
be very low, and impacts are thought not ... | astro-ph_EP |
Inferring asymmetric limb cloudiness on exoplanets from transit light
curves: Clouds have been shown to be present in many exoplanetary atmospheres. Cloud
formation modeling predicts considerable inhomogeneities of cloud cover,
consistent with optical phase curve observations. However, optical phase curves
cannot res... | astro-ph_EP |
Fractional Order Analysis of the Polytropic Models Applied to Exoplanets: Physical conditions deep within planets and exoplanets have yet to be
measured directly, but indirect methods can calculate them. The polytropic
models are one possible solution to this problem. In the present paper, we
assume that the interiors ... | astro-ph_EP |
IR Spectroscopy of Synthetic Glasses with Mercury Surface Composition:
Analogs for Remote Sensing: In a study to provide ground truth data for mid infrared observations of the
surface of Mercury with the MERTIS (Mercury Radiometer and Thermal Infrared
Spectrometer) instrument onboard the ESA/JAXA BepiColombo mission,... | astro-ph_EP |
Absolute colours and phase coefficients of trans-Neptunian objects:
Correlations and Populations: The study of the visible colours of the trans-Neptunian objects opened a
discussion almost 20 years ago which, in spite of the increase in the amount of
available data, seems far from subside. Visible colours impose cons... | astro-ph_EP |
Tidal Dissipation and Obliquity Evolution in Hot Jupiter Systems: Two formation scenarios have been proposed to explain the tight orbits of hot
Jupiters. They could be formed in orbits with a small inclination (with respect
to the stellar spin) via disk migration, or in more highly inclined orbits via
high-eccentricity... | astro-ph_EP |
Understanding the atmospheric properties and chemical composition of the
ultra-hot Jupiter HAT-P-7b: III. Changing ionisation and the emergence of an
ionosphere: Ultra-hot Jupiters are the hottest close-in exoplanets discovered so far, and
present a unique possibility to explore hot and cold chemistry on one object... | astro-ph_EP |
The Architecture of the Cassini Division: The Cassini Division in Saturn's rings contains a series of eight named gaps,
three of which contain dense ringlets. Observations of stellar occultations by
the Visual and Infrared Mapping Spectrometer onboard the Cassini spacecraft
have yielded ~40 accurate and precise measure... | astro-ph_EP |
Hybrid methods in planetesimal dynamics (I) : Description of a new
composite algorithm: The formation and evolution of protoplanetary systems, the breeding grounds
of planet formation, is a complex dynamical problem that involves many orders
of magnitudes. To serve this purpose, we present a new hybrid algorithm that... | astro-ph_EP |
No hydrogen exosphere detected around the super-Earth HD97658 b: The exoplanet HD97658b provides a rare opportunity to probe the atmospheric
composition and evolution of moderately irradiated super-Earths. It transits a
bright K star at a moderate orbital distance of 0.08 au. Its low density is
compatible with a massiv... | astro-ph_EP |
Disk Accretion Driven by Spiral Shocks: Spiral density waves are known to exist in many astrophysical disks,
potentially affecting disk structure and evolution. We conduct a numerical
study of the effects produced by a density wave, evolving into a shock, on the
characteristics of the underlying disk. We measure the de... | astro-ph_EP |
Kepler's Orbits and Special Relativity in Introductory Classical
Mechanics: Kepler's orbits with corrections due to Special Relativity are explored using
the Lagrangian formalism. A very simple model includes only relativistic
kinetic energy by defining a Lagrangian that is consistent with both the
relativistic momen... | astro-ph_EP |
Evidence For A Vertical Dependence on the Pressure Structure in AS 209: We present an improved method to measure the rotation curves for disks with
non-axisymmetric brightness profiles initially published in Teague et al.
(2018a). Application of this method to the well studied AS$~$209 system shows
substantial deviatio... | astro-ph_EP |
The Old and New Meanings of Cloud 'Belt' and 'Zone': A Study of Jovian
and Saturnian Atmospheric Banding: The brightness of cloud bands on Jupiter and Saturn as a function of latitude
is reported. Bright Jovian bands near the equator are located in regions of
anti-cyclonic circulation of the atmosphere. By contrast, ... | astro-ph_EP |
Extreme trans-Neptunian objects and the Kozai mechanism: signalling the
presence of trans-Plutonian planets: The existence of an outer planet beyond Pluto has been a matter of debate for
decades and the recent discovery of 2012 VP113 has just revived the interest
for this controversial topic. This Sedna-like object h... | astro-ph_EP |
The Manifold Of Variations: impact location of short-term impactors: The interest in the problem of small asteroids observed shortly before a deep
close approach or an impact with the Earth has grown a lot in recent years.
Since the observational dataset of such objects is very limited, they deserve
dedicated orbit det... | astro-ph_EP |
Determining fireball fates using the $α$-$β$ criterion: As fireball networks grow, the number of events observed becomes unfeasible
to manage by manual efforts. Reducing and analysing big data requires automated
data pipelines. Triangulation of a fireball trajectory can swiftly provide
information on positions and, wit... | astro-ph_EP |
A Possible Mechanism for Overcoming the Electrostatic Barrier Against
Dust Growth in Protoplanetary disks: The coagulation of dust particles under the conditions in protoplanetary
disks is investigated. The study focuses on the repulsive electrostatic barrier
against growth of charged dust grains. Taking into account... | astro-ph_EP |
Lightcurve Survey of V-type Asteroids. I. Observations until Spring 2004: To examine the distribution of rotational rates for chips of asteroid 4
Vesta, lightcurve observation of seven V-type asteroids (2511 Patterson, 2640
Hallstorm, 2653 Principia, 2795 Lapage, 3307 Athabasca, 4147 Lennon, and 4977
Rauthgundis) were ... | astro-ph_EP |
Precise Dynamical Masses and Orbital Fits for $β$ Pic b and $β$
Pic c: We present a comprehensive orbital analysis to the exoplanets $\beta$
Pictoris b and c that resolves previously reported tensions between the
dynamical and evolutionary mass constraints on $\beta$ Pic b. We use the MCMC
orbit code orvara to fit fi... | astro-ph_EP |
Detecting extrasolar moons akin to solar system satellites with an
orbital sampling effect: Despite years of high accuracy observations, none of the available
theoretical techniques has yet allowed the confirmation of a moon beyond the
solar system. Methods are currently limited to masses about an order of
magnitude ... | astro-ph_EP |
Probing exoplanet clouds with optical phase curves: Kepler-7b is to date the only exoplanet for which clouds have been inferred
from the optical phase curve -- from visible-wavelength whole-disk brightness
measurements as a function of orbital phase. Added to this, the fact that the
phase curve appears dominated by ref... | astro-ph_EP |
Photoevaporative Dispersal of Protoplanetary Disks around Evolving
Intermediate-mass Stars: We aim to understand the effect of stellar evolution on the evolution of
protoplanetary disks. We focus in particular on the disk evolution around
intermediate-mass (IM) stars, which evolve more rapidly than low-mass ones. We
... | astro-ph_EP |
Spectroscopic Time-series Performance of JWST/NIRSpec from Commissioning
Observations: We report on JWST commissioning observations of the transiting exoplanet
HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the
NIRSpec instrument with the G395H/F290LP grating/filter combination
($3-5\mu$m). W... | astro-ph_EP |
Structured Distributions of Gas and Solids in Protoplanetary Disks: Recent spatially-resolved observations of protoplanetary disks revealed a
plethora of substructures, including concentric rings and gaps, inner cavities,
misalignments, spiral arms, and azimuthal asymmetries. This is the major
breakthrough in studies o... | astro-ph_EP |
Thermal properties of Rhea's Poles: Evidence for a Meter-Deep
Unconsolidated Subsurface Layer: Cassini's Composite Infrared Spectrometer (CIRS) observed both of Rhea's
polar regions during two flybys on 2013/03/09 and 2015/02/10. The results show
Rhea's southern winter pole is one of the coldest places directly obser... | astro-ph_EP |
A Planetary Companion around a Metal-Poor Star with Extragalactic Origin: We report the detection of a planetary companion around HIP 13044, a
metal-poor star on the red Horizontal Branch. The detection is based on radial
velocity observations with FEROS, a high-resolution spectrograph at the 2.2-m
MPG/ESO telescope, l... | astro-ph_EP |
New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b,
WASP-3 b, and XO-2 b: We present new transit observations acquired between 2014 and 2018 for the
hot exoplanets GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b. New
mid-transit times extend the timespan covered by observations of these
exoplan... | astro-ph_EP |
Autonomous Rapid Exploration in Close-Proximity of an Asteroid: The increasing number of space missions may overwhelm ground support
infrastructure, prompting the need for autonomous deep-space guidance,
navigation, and control (GN\&C) systems. These systems offer sustainable and
cost-effective solutions, particularly ... | astro-ph_EP |
Planet Shadows in Protoplanetary Disks. II: Observable Signatures: We calculate simulated images of disks perturbed by embedded small planets.
These 10-50 M_Earth bodies represent the growing cores of giant planets. We
examine scattered light and thermal emission from these disks over a range of
wavelengths, taking int... | astro-ph_EP |
Kepler-1656b's Extreme Eccentricity: Signature of a Gentle Giant: Highly eccentric orbits are one of the major surprises of exoplanets relative
to the Solar System and indicate rich and tumultuous dynamical histories. One
system of particular interest is Kepler-1656, which hosts a sub-Jovian planet
with an eccentricity... | astro-ph_EP |
Spectral signature of atmospheric winds in high resolution transit
observations: The study of exoplanet atmospheres showed large diversity compared to the
planets in our solar system. Especially Jupiter type exoplanets orbiting their
host star in close orbits, the so-called hot and ultra-hot Jupiters, have been
studi... | astro-ph_EP |
Possible formation pathways for the low density Neptune-mass planet
HAT-P-26b: We investigate possible pathways for the formation of the low density
Neptune-mass planet HAT-P-26b. We use two formation different models based on
pebbles and planetesimals accretion, and includes gas accretion, disk migration
and simple ... | astro-ph_EP |
Stochastic orbital migration of small bodies in Saturn's rings: Many small moonlets, creating propeller structures, have been found in
Saturn's rings by the Cassini spacecraft. We study the dynamical evolution of
such 20-50m sized bodies which are embedded in Saturn's rings. We estimate the
importance of various intera... | astro-ph_EP |
Vortex Formation and Survival in Protoplanetary Disks subject to
Vertical Shear Instability: Several protoplanetary disks observed by ALMA show dust concentrations
consistent with particle trapping in giant vortices. The formation and survival
of vortices is of major importance for planet formation, because vortices ... | astro-ph_EP |
Orbital structure of the GJ876 extrasolar planetary system, based on the
latest Keck and HARPS radial velocity data: We use full available array of radial velocity data, including recently
published HARPS and Keck observatory sets, to characterize the orbital
configuration of the planetary system orbiting GJ876. Firs... | astro-ph_EP |
Radial Drift of Dust in Protoplanetary Disks: The Evolution of Ice lines
and Dead zones: We have developed a new model for the astrochemical structure of a viscously
evolving protoplanetary disk that couples an analytic description of the disk's
temperature and density profile, chemical evolution, and an evolving dus... | astro-ph_EP |
Effect of Non-Adiabatic Thermal Profiles on the Inferred Compositions of
Uranus and Neptune: It has been a common assumption of interior models that the outer planets of
our solar system are convective, and that the internal temperature
distributions are therefore adiabatic. This assumption is also often applied to
e... | astro-ph_EP |
Predicting the magnetic vectors within coronal mass ejections arriving
at Earth: 1. Initial Architecture: The process by which the Sun affects the terrestrial environment on short
timescales is predominately driven by the amount of magnetic reconnection
between the solar wind and Earth's magnetosphere. Reconnection o... | astro-ph_EP |
Ground- and Space-based Detection of the Thermal Emission Spectrum of
the Transiting Hot Jupiter KELT-2Ab: We describe the detection of water vapor in the atmosphere of the transiting
hot Jupiter KELT-2Ab by treating the star-planet system as a spectroscopic
binary with high-resolution, ground-based spectroscopy. We ... | astro-ph_EP |
Multi-Output Random Forest Regression to Emulate the Earliest Stages of
Planet Formation: In the current paradigm of planet formation research, it is believed that the
first step to forming massive bodies (such as asteroids and planets) requires
that small interstellar dust grains floating through space collide with ... | astro-ph_EP |
Concentrating small particles in protoplanetary disks through the
streaming instability: Laboratory experiments indicate that direct growth of silicate grains via
mutual collisions can only produce particles up to roughly millimeters in size.
On the other hand, recent simulations of the streaming instability have sho... | astro-ph_EP |
KIC 8462852: Transit of a Large Comet Family: We investigate the plausibility of a cometary source of the unusual transits
observed in the KIC 8462852 light curve. A single comet of similar size to
those in our solar system produces a transit depth of the order of $10^{-3}$
lasting less than a day which is much smaller... | astro-ph_EP |
A grid of upper atmosphere models for 1--40 MEARTH planets: application
to CoRoT-7 b and HD219134 b,c: There is growing observational and theoretical evidence suggesting that
atmospheric escape is a key driver of planetary evolution. Commonly, planetary
evolution models employ simple analytic formulae (e.g., energy l... | astro-ph_EP |
Teegarden's Star revisited: A nearby planetary system with at least
three planets: The two known planets in the planetary system of Teegarden's Star are among
the most Earth-like exoplanets currently known. Revisiting this nearby
planetary system with two planets in the habitable zone aims at a more complete
census o... | astro-ph_EP |
Effects of Dust Evolution on the Vertical Shear Instability in the Outer
Regions of Protoplanetary Disks: The vertical shear instability (VSI) is a hydrodynamical instability that
requires rapid gas cooling and has been suggested to operate in outer regions
of protoplanetary disks. The VSI drives turbulence with stro... | astro-ph_EP |
High contrast imaging at 10 microns, a search for exoplanets around: Eps
Indi A, Eps Eri, Tau Ceti, Sirius A and Sirius B: The direct imaging of rocky exoplanets is one of the major science goals for
upcoming large telescopes. The contrast requirement for imaging such planets is
challenging. However, the mid-IR (Infr... | astro-ph_EP |
Tidal dissipation in a homogeneous spherical body. I. Methods: A formula for the tidal dissipation rate in a spherical body is derived from
first principles, to correct some mathematical inaccuracies found in the
literature. The development is combined with the Darwin-Kaula formalism for
tides. Our intermediate results... | astro-ph_EP |
Insights on the dynamical history of the Fomalhaut system -
Investigating the Fom c hypothesis: The eccentric shape of the debris disk observed around Fomalhaut was first
attributed to Fom b, a companion detected near the belt inner-edge, but new
constraints on its orbit revealed that it is belt-crossing, highly ecce... | astro-ph_EP |
A multiplicity study of transiting exoplanet host stars. I.
High-contrast imaging with VLT/SPHERE: We study the multiplicity of host stars to known transiting extra-solar
planets to test competing theories on the formation mechanisms of hot Jupiters.
We observed 45 exoplanet host stars using VLT/SPHERE/IRDIS to searc... | astro-ph_EP |
Dynamics of Planetary Systems Within Star Clusters: Aspects of the Solar
System's Early Evolution: Most planetary systems -- including our own -- are born within stellar
clusters, where interactions with neighboring stars can help shape the system
architecture. This paper develops an orbit-averaged formalism to chara... | astro-ph_EP |
ExoData: A python package to handle large exoplanet catalogue data: Exoplanet science often involves using the system parameters of real
exoplanets for tasks such as simulations, fitting routines, and target
selection for proposals. Several exoplanet catalogues are already well
established but often lack a version hist... | astro-ph_EP |
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