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The impact of intrinsic magnetic field on the absorption signatures of
elements probing the upper atmosphere of HD209458b: The signs of an expanding atmosphere of HD209458b have been observed with
far-ultraviolet transmission spectroscopy and in the measurements of transit
absorption by metastable HeI. These observat... | astro-ph_EP |
The determination of the trajectory of Chelyabinsk bolide according to
the records of the drive cams and the simulation of the fragments motion in
the atmosphere: The determination of the trajectory of Chelyabinsk bolide according to the
video records is performed and the results of the simulation of the fragment
m... | astro-ph_EP |
Extrasolar planet population synthesis I: Method, formation tracks and
mass-distance distribution: With the high number of extrasolar planets discovered by now, it becomes
possible to constrain theoretical formation models in a statistical sense. This
paper is the first in a series in which we carry out a large numbe... | astro-ph_EP |
Spectral and orbital characterisation of the directly imaged giant
planet HIP 65426 b: HIP 65426 b is a recently discovered exoplanet imaged during the course of
the SPHERE-SHINE survey. Here we present new $L'$ and $M'$ observations of the
planet from the NACO instrument at the VLT from the NACO-ISPY survey, as well... | astro-ph_EP |
Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet
atmosphere: We present a primary transit observation for the ultra hot (Teq~2400K) gas
giant expolanet WASP-121b, made using the Hubble Space Telescope Wide Field
Camera 3 in spectroscopic mode across the 1.12-1.64 micron wavelength range.
The 1.4 mic... | astro-ph_EP |
The habitable zone for Earthlike exomoons orbiting Kepler-1625b: The recent announcement of a Neptune-sized exomoon candidate orbiting the
Jupiter-sized object Kepler-1625b has forced us to rethink our assumptions
regarding both exomoons and their host exoplanets. In this paper I describe
calculations of the habitable ... | astro-ph_EP |
The Influence of Age on the Relative Frequency of Super-Earths and
Sub-Neptunes: There is growing evidence that the population of close-in planets discovered
by the Kepler mission was sculpted by atmospheric loss, though the typical
timescale for this evolution is not well-constrained. Among a highly complete
sample ... | astro-ph_EP |
An Unprecedented Constraint on Water Content in the Sunlit Lunar
Exosphere Seen by Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission: The content of $\mathrm{OH/H_2O}$ molecules in the tenuous exosphere of the
Moon is still an open issue at present. We here report an unprecedented upper
limit of the content of t... | astro-ph_EP |
Global Chemistry and Thermal Structure Models for the Hot Jupiter
WASP-43b and Predictions for JWST: The James Webb Space Telescope (JWST) is expected to revolutionize the field
of exoplanets. The broad wavelength coverage and the high sensitivity of its
instruments will allow characterization of exoplanetary atmosph... | astro-ph_EP |
Pre-LHB Evolution of the Earth's Obliquity: The Earth's obliquity is stabilized by the Moon, which facilitates a rapid
precession of the Earth's spin-axis, de-tuning the system away from resonance
with orbital modulation. It is however, likely that the architecture of the
Solar System underwent a dynamical instability-... | astro-ph_EP |
TRAPPIST-1h as an Exo-Titan. I. The Role of Assumptions about
Atmospheric Parameters in Understanding an Exoplanet Atmosphere: The TRAPPIST-1 system is home to at least seven terrestrial planets and is a
target of interest for future James Webb Space Telescope (JWST) observations.
Additionally, these planets will be ... | astro-ph_EP |
Yearly and seasonal variations of low albedo surfaces on Mars in the
OMEGA/MEx dataset: Constraints on aerosols properties and dust deposits: The time variations of spectral properties of dark martian surface features
are investigated using the OMEGA near-IR dataset. The analyzed period covers
two Mars years, spannin... | astro-ph_EP |
Deep exploration of $ε$ Eridani with Keck Ms-band vortex
coronagraphy and radial velocities: mass and orbital parameters of the giant
exoplanet: We present the most sensitive direct imaging and radial velocity (RV)
exploration of $\epsilon$ Eridani to date. $\epsilon$ Eridani is an adolescent
planetary system, remi... | astro-ph_EP |
NEMESIS: Exoplanet Transit Survey of Nearby M-Dwarfs in TESS FFIs I: In this work, we present the analysis of 33,054 M-dwarf stars located within
100 parsecs in the Transiting Exoplanet Survey Satellite (TESS) Full Frame
Images (FFIs) of the observed sectors 1 to 5. We present a new pipeline called
NEMESIS which was de... | astro-ph_EP |
H2-Induced Pressure Broadening and Pressure Shift in the P-Branch of the
v3 Band of CH4 from 300 to 700 K: For accurate modelling of observations of exoplanet atmospheres,
quantification of the pressure broadening of infrared absorption lines for and
by a variety of gases at elevated temperatures is needed. High-reso... | astro-ph_EP |
High-resolution transmission spectroscopy of ultra-hot Jupiter WASP-33b
with NEID: We report an attempt to detect molecular and atomic species in the atmosphere
of the ultra-hot Jupiter WASP-33b using the high-resolution echelle
spectrograph NEID with a wavelength coverage of 380$-$930 nm. By analyzing the
transmissi... | astro-ph_EP |
Global Models of Runaway Accretion in White Dwarf Debris Disks: A growing sample of white dwarfs (WDs) with metal-enriched atmospheres are
accompanied by excess infrared emission, indicating that they are encircled by
a compact dusty disk of solid debris. Such `WD debris disks' are thought to
originate from the tidal d... | astro-ph_EP |
EOS: Atmospheric Radiative Transfer in Habitable Worlds with HELIOS: We present EOS, a procedure for determining the Outgoing Longwave Radiation
(OLR) and top-of-atmosphere (TOA) albedo for a wide range of conditions
expected to be present in the atmospheres of rocky planets with temperate
conditions. EOS is based on H... | astro-ph_EP |
A Circumbinary Debris Disk in a Polluted White Dwarf System: Planetary systems commonly survive the evolution of single stars, as
evidenced by terrestrial-like planetesimal debris observed orbiting and
polluting the surfaces of white dwarfs. This letter reports the identification
of a circumbinary dust disk surrounding... | astro-ph_EP |
Jupiter's Ammonia Distribution Derived from VLA Maps at 3--37 GHz: We observed Jupiter four times over a full rotation (10 hrs) with the
upgraded Karl G. Jansky Very Large Array (VLA) between December 2013 and
December 2014. Preliminary results at 4-17 GHz were presented in de Pater et
al. (2016); in the present paper ... | astro-ph_EP |
Titan-Hyperion Resonance and the Tidal Q of Saturn: Lainey et al. (2012), by re-analyzing long-baseline astrometry of Saturn's
moons, have found that the moons' tidal evolution is much faster than
previously thought, implying an order of magnitude stronger tidal dissipation
within Saturn. This result is controversial a... | astro-ph_EP |
An upper limit on late accretion and water delivery in the Trappist-1
exoplanet system: The Trappist-1 system contains seven roughly Earth-sized planets locked in a
multi-resonant orbital configuration, which has enabled precise measurements of
the planets' masses and constrained their compositions. Here we use the
s... | astro-ph_EP |
Olivine-Carbonate Mineralogy of Jezero Crater: A well-preserved, ancient delta deposit, in combination with ample exposures
of Mg-carbonate rich materials, make Jezero Crater in Nili Fossae a compelling
astrobiological site and a top candidate for future landed missions to Mars. We
use CRISM observations to characteriz... | astro-ph_EP |
The extrasolar planet Gliese 581 d: a potentially habitable planet?
(Corrigendum to arXiv:1009.5814): We report here that the equation for H2O Rayleigh scattering was incorrectly
stated in the original paper [arXiv:1009.5814]. Instead of a quadratic
dependence on refractivity r, we accidentally quoted an r^4 dependen... | astro-ph_EP |
Detection of water absorption in the day side atmosphere of HD 189733 b
using ground-based high-resolution spectroscopy at 3.2 microns: We report a 4.8 sigma detection of water absorption features in the day side
spectrum of the hot Jupiter HD 189733 b. We used high-resolution (R~100,000)
spectra taken at 3.2 microns... | astro-ph_EP |
An automated procedure for the detection of the Yarkovsky effect and
results from the ESA NEO Coordination Centre: Context: The measurement of the Yarkovsky effect on near-Earth asteroids
(NEAs) is common practice in orbit determination today, and the number of
detections will increase with the developments of new an... | astro-ph_EP |
Water ice in the Kuiper belt: We examine a large collection of low resolution near-infrared spectra of
Kuiper belt objects and centaurs in an attempt to understand the presence of
water ice in the Kuiper belt. We find that water ice on the surface of these
objects occurs in three separate manners: (1) Haumea family mem... | astro-ph_EP |
The Sizes and Albedos of Centaurs 2014 YY $_{49}$ and 2013 NL $_{24}$
from Stellar Occultation Measurements by RECON: In 2019, the Research and Education Collaborative Occultation Network (RECON)
obtained multiple-chord occultation measurements of two centaur objects: 2014
YY$_{49}$ on 2019 January 28 and 2013 NL$_{2... | astro-ph_EP |
Coupling between corotation and Lindblad resonances in the elliptic
planar three-body problem: We investigate the dynamics of two satellites with masses $\mu_s$ and
$\mu'_s$ orbiting a massive central planet in a common plane, near a first
order mean motion resonance $m$+1:$m$ ($m$ integer). We consider only the
reso... | astro-ph_EP |
Exoplanet Atmospheres at High Spectral Resolution: The spectrum of an exoplanet reveals the physical, chemical, and biological
processes that have shaped its history and govern its future. However,
observations of exoplanet spectra are complicated by the overwhelming glare of
their host stars. This review chapter focus... | astro-ph_EP |
The timeline of the Lunar bombardment - revisited: The timeline of the lunar bombardment in the first Gy of the Solar System
remains unclear. Some basin-forming impacts occurred 3.9-3.7Gy ago. Many other
basins formed before, but their exact ages are not precisely known. There are
two possible interpretations of the da... | astro-ph_EP |
Scattered light images of spiral arms in marginally gravitationally
unstable discs with an embedded planet: Scattered light images of transition discs in the near-infrared often show
non-axisymmetric structures in the form of wide-open spiral arms in addition to
their characteristic low-opacity inner gap region. We s... | astro-ph_EP |
On the origin and composition of Theia: Constraints from new models of
the Giant Impact: Knowing the isotopic composition of Theia, the proto-planet which collided
with the Earth in the Giant Impact that formed the Moon, could provide
interesting insights on the state of homogenization of the inner solar system
at th... | astro-ph_EP |
Planet Packing in Circumbinary Systems: The recent discovery of planets orbiting main sequence binaries will provide
crucial constraints for theories of binary and planet formation. The formation
pathway for these planets is complicated by uncertainties in the formation
mechanism of the host stars. In this paper, we co... | astro-ph_EP |
The vertical structure of Jupiter's equatorial zonal wind above the
cloud deck, derived using mesoscale gravity waves: Data from the Galileo Probe, collected during its descent into Jupiter's
atmosphere, is used to obtain a vertical profile of the zonal wind from
$\mathbf{\sim 0.5}$ bar (upper troposphere) to $\mathb... | astro-ph_EP |
55 Cancri: A Coplanar Planetary System that is Likely Misaligned with
its Star: Although the 55 Cnc system contains multiple, closely packed planets that are
presumably in a coplanar configuration, we use numerical simulations to
demonstrate that they are likely to be highly inclined to their parent star's
spin axis.... | astro-ph_EP |
Observability of substructures in planet-forming disk in (sub)cm
wavelength with SKA and ngVLA: Current imaging observations of protoplanetary disks using ALMA primarily
focus on the sub-millimeter wavelength, leaving a gap in effective
observational approaches for centimeter-sized dust, which is crucial to the
issue... | astro-ph_EP |
Persephone: A Pluto-System Orbiter and Kuiper Belt Explorer: Persephone is a NASA concept mission study that addresses key questions
raised by New Horizons' encounters with Kuiper Belt objects (KBOs), with
arguably the most important being "Does Pluto have a subsurface ocean?". More
broadly, Persephone would answer fou... | astro-ph_EP |
Chemical abundances of neutron capture elements in exoplanet-hosting
stars: To understand the formation and composition of planetary systems it is
important to study their host stars composition since both are formed in the
same stellar nebula. In this work we analyze the behaviour of chemical
abundances of Cu, Zn, S... | astro-ph_EP |
Tidal dissipation in multi-planet systems and constraints to
orbit-fitting: We present here in full details the linear secular theory with tidal damping
that was used to constraint the fit of the HD10180 planetary system in (Lovis
et al. 2011). The theory is very general and can provide some intuitive
understanding o... | astro-ph_EP |
Telling twins apart: Exo-Earths and Venuses with transit spectroscopy: The planned launch of the James Webb Space Telescope in 2018 will herald a
new era of exoplanet spectroscopy. JWST will be the first telescope sensitive
enough to potentially characterize terrestrial planets from their transmission
spectra. In this ... | astro-ph_EP |
Obliquity evolution of the minor satellites of Pluto and Charon: New Horizons mission observations show that the small satellites Styx, Nix,
Kerberos and Hydra, of the Pluto-Charon system, have not tidally spun-down to
near synchronous spin states and have high obliquities with respect to their
orbit about the Pluto-Ch... | astro-ph_EP |
Growth and Evolution of Secondary Volcanic Atmospheres: II. The
Importance of Kinetics: Volcanism is a major and long-term source of volatile elements such as C and
H to Earth's atmosphere, likely has been to Venus's atmosphere, and may be for
exoplanets. Models simulating volcanic growth of atmospheres often make on... | astro-ph_EP |
A Gaussian process framework for modelling instrumental systematics:
application to transmission spectroscopy: Transmission spectroscopy, which consists of measuring the
wavelength-dependent absorption of starlight by a planet's atmosphere during a
transit, is a powerful probe of atmospheric composition. However, the... | astro-ph_EP |
Physical Parameters of Asteroids Estimated from the WISE 3 Band Data and
NEOWISE Post-Cryogenic Survey: Enhancements to the science data processing pipeline of NASA's Wide-field
Infrared Explorer (WISE) mission, collectively known as NEOWISE, resulted in
the detection of $>$158,000 minor planets in four infrared wave... | astro-ph_EP |
Millimeter Gap Contrast as a Probe for Turbulence Level in
Protoplanetary Disks: Turbulent motions are believed to regulate angular momentum transport and
influence dust evolution in protoplanetary disks. Measuring the strength of
turbulence is challenging through gas line observations because of the
requirement for ... | astro-ph_EP |
Common 0.1 bar Tropopause in Thick Atmospheres Set by Pressure-Dependent
Infrared Transparency: A minimum atmospheric temperature, or tropopause, occurs at a pressure of
around 0.1 bar in the atmospheres of Earth, Titan, Jupiter, Saturn, Uranus and
Neptune, despite great differences in atmospheric composition, gravit... | astro-ph_EP |
Submillimeter Array Observations of the RX J1633.9-2442 Transition Disk:
Evidence for Multiple Planets in the Making: We present continuum high resolution Submillimeter Array (SMA) observations
of the transition disk object RX J1633.9-2442, which is located in the
Ophiuchus molecular cloud and has recently been ident... | astro-ph_EP |
Combining high-dispersion spectroscopy (HDS) with high contrast imaging
(HCI): Probing rocky planets around our nearest neighbors: Aims: In this work, we discuss a way to combine High Dispersion Spectroscopy
and High Contrast Imaging (HDS+HCI). For a planet located at a resolvable
angular distance from its host star,... | astro-ph_EP |
High-precision photometry by telescope defocussing. I. The transiting
planetary system WASP-5: We present high-precision photometry of two transit events of the extrasolar
planetary system WASP-5, obtained with the Danish 1.54m telescope at ESO La
Silla. In order to minimise both random and flat-fielding errors, we d... | astro-ph_EP |
A LOOK at Outbursts of Comet C/2014 UN$_{271}$ (Bernardinelli-Bernstein)
Near 20 au: Cometary activity may be driven by ices with very low sublimation
temperatures, such as carbon monoxide ice, which can sublimate at distances
well beyond 20 au. This point is emphasized by the discovery of Oort cloud
comet C/2014 UN$... | astro-ph_EP |
Constraints on Planet Occurrence around Nearby Mid-to-Late M Dwarfs from
the MEarth Project: The MEarth Project is a ground-based photometric survey to find planets
transiting the closest and smallest main-sequence stars. In its first four
years, MEarth discovered one transiting exoplanet, the 2.7 Earth radius planet... | astro-ph_EP |
Formation of giant planets with large metal masses and metal fractions
via giant impacts in a rapidly dissipating disk: According to planetary interior models, some giant planets contain large
metal masses with large metal-mass fractions. HD 149026b and TOI-849b are
characteristic examples of these giant planets. It ... | astro-ph_EP |
The Hubble PanCET program: An extensive search for metallic ions in the
exosphere of GJ 436 b: (Abridged) The quiet M2.5 star GJ 436 hosts a warm Neptune that displays an
extended atmosphere that dwarfs its own host star. Predictions of atmospheric
escape in such planets state that H atoms escape from the upper atmos... | astro-ph_EP |
Five Special Types of Orbits Around Mars: The abstract is additional with repect to the paper published in JGCD.
Ordinary Earth satellites are usually placed into five categories of special
orbits: sun-synchronous orbits, orbits at the critical inclination, frozen
orbits, repeating ground track orbits, and geostationar... | astro-ph_EP |
Wind-Enhanced Interaction of Radiation and Dust (WEIRD) and the Growth
and Maintenance of Local Dust Storms on Mars: A radiative-dynamic positive feedback mechanism (Wind Enhanced Interaction of
Radiation and Dust: WEIRD) for localized Mars dust disturbances was previously
found to operate in highly idealized numeric... | astro-ph_EP |
Deserts and pile-ups in the distribution of exoplanets due to
photoevaporative disc clearing: We present models of giant planet migration in evolving protoplanetary discs.
We show that disc clearing by EUV photoevaporation can have a strong effect on
the distribution of giant planet semi-major axes. During disc clear... | astro-ph_EP |
Long-Term Cycling of Kozai-Lidov Cycles: Extreme Eccentricities and
Inclinations Excited by a Distant Eccentric Perturber: Kozai-Lidov oscillations of Jupiter-mass planets, excited by comparable
planetary or brown dwarf mass perturbers were recently shown in numerical
experiments to be slowly modulated and to exhibit... | astro-ph_EP |
Refined Parameters of Chelyabinsk and Tunguska Meteoroids and their
Explosion Modes: This paper describes application of mathematical model that establishes
relationship between parameters of celestial bodies motion in the spheres of
activity of the Sun and the Earth with mass-energy characteristics of these
objects ... | astro-ph_EP |
Elimination of a virtual impactor of 2006 QV89 via deep non-detection: As a consequence of the large (and growing) number of near-Earth objects
discovered, some of them are lost before their orbit can be firmly established
to ensure long-term recovery. A fraction of these present non-negligible
chances of impact with t... | astro-ph_EP |
Misaligned And Alien Planets From Explosive Death Of Stars: Exoplanets whose orbit is misaligned with the spin of their host star could
have originated from high-speed gas blobs, which are observed in multitudes in
nearby supernova remnants and planetary nebulae. These blobs grow in mass and
slow down in the interstell... | astro-ph_EP |
Dust Formation in Astrophysical Environments: The Importance of Kinetics: Astronomical observations and analysis of stardust isolated from meteorites
have revealed a highly diverse interstellar and circumstellar grain inventory,
including a wide range of amorphous materials and crystalline compounds
(silicates and carb... | astro-ph_EP |
Tidal dissipation and the formation of Kepler near-resonant planets: Multi-planetary systems detected by the Kepler mission present an excess of
planets close to first-order mean-motion resonances (2:1 and 3:2) but with a
period ratio slightly higher than the resonant value. Several mechanisms have
been proposed to exp... | astro-ph_EP |
29P/Schwassmann-Wachmann: A Rosetta Stone for Amorphous Water Ice and CO
<-> CO2 Conversion in Centaurs and Comets?: Centaur 29P/Schwassmann-Wachmann 1 (SW1) is a highly active object orbiting
in the transitional Gateway region (Sarid et al. 2019) between the Centaur and
Jupiter Family Comet regions. SW1 is unique am... | astro-ph_EP |
Using Deep Neural Networks to compute the mass of forming planets: Computing the mass of planetary envelopes and the critical mass beyond which
planets accrete gas in a runaway fashion is important when studying planet
formation, in particular for planets up to the Neptune mass range. This
computation requires in princ... | astro-ph_EP |
Determination of the Interior Structure of Transiting Planets in
Multiple-Planet Systems: Tidal dissipation within a short-period transiting extrasolar planet
perturbed by a companion object can drive orbital evolution of the system to a
so-called tidal fixed point, in which the apsidal lines of the transiting
planet... | astro-ph_EP |
Stability Constrained Characterization of Multiplanet Systems: Many discovered multiplanet systems are tightly packed. This implies that
wide parameter ranges in masses and orbital elements can be dynamically
unstable and ruled out. We present a case study of Kepler-23, a compact
three-planet system where constraints f... | astro-ph_EP |
New insights into temperature-dependent ice properties and their effect
on ice shell convection for icy ocean worlds: Ice shell dynamics are an important control on the habitability of icy ocean
worlds. Here we present a systematic study evaluating the effect of
temperature-dependent material properties on these dyna... | astro-ph_EP |
Revisiting fundamental properties of TiO$_2$ nanoclusters as
condensation seeds in astrophysical environments: The formation of inorganic cloud particles takes place in several atmospheric
environments including those of warm, hot, rocky and gaseous exoplanets, brown
dwarfs, and AGB stars. The cloud particle formatio... | astro-ph_EP |
p-winds: an open-source Python code to model planetary outflows and
upper atmospheres: Atmospheric escape is considered to be one of the main channels for evolution
in sub-Jovian planets, particularly in their early lives. While there are
several hypotheses proposed to explain escape in exoplanets, testing them with
... | astro-ph_EP |
Multiple Spiral Arms in Protoplanetary Disks: Linear Theory: Recent observations of protoplanetary disks, as well as simulations of
planet-disk interaction, have suggested that a single planet may excite
multiple spiral arms in the disk, in contrast to the previous expectations
based on linear theory (predicting a one-... | astro-ph_EP |
Cosmic History and a Candidate Parent Asteroid for the
Quasicrystal-bearing Meteorite Khatyrka: The unique CV-type meteorite Khatyrka is the only natural sample in which
"quasicrystals" and associated crystalline Cu,Al-alloys, including khatyrkite
and cupalite, have been found. They are suspected to have formed in th... | astro-ph_EP |
Physical, spectral, and dynamical properties of asteroid (107) Camilla
and its satellites: The population of large asteroids is thought to be primordial and they are
the most direct witnesses of the early history of our Solar System. Those
satellites allow study of the mass, and hence density and internal structure.
... | astro-ph_EP |
Jupiter's Para-H$_2$ Distribution from SOFIA/FORCAST and Voyager/IRIS
17-37 $μ$m Spectroscopy: Spatially resolved maps of Jupiter's far-infrared 17-37 $\mu$m
hydrogen-helium collision-induced spectrum were acquired by the FORCAST
instrument on the Stratospheric Observatory for Infrared Astronomy (SOFIA) in
May 2014. ... | astro-ph_EP |
Using Dust Shed from Asteroids as Microsamples to Link Remote
Measurements with Meteorite Classes: Given the compositional diversity of asteroids, and their distribution in
space, it is impossible to consider returning samples from each one to
establish their origin. However, the velocity and molecular composition of... | astro-ph_EP |
Application of the MEGNO technique to the dynamics of Jovian irregular
satellites: We apply the MEGNO (Mean Exponential Growth of Nearby Orbits) technique to
the dynamics of Jovian irregular satellites. We demonstrate the efficiency of
applying the MEGNO indicator to generate a mapping of relevant phase-space
regions... | astro-ph_EP |
Evidence for H$_{2}$ Dissociation and Recombination Heat Transport in
the Atmosphere of KELT-9b: Phase curve observations provide an opportunity to study the full energy
budgets of exoplanets by quantifying the amount of heat redistributed from
their daysides to their nightsides. Theories explaining the properties of... | astro-ph_EP |
Polarimetric and Photometric Observations of NEAs; (422699) 2000 PD3 and
(3200) Phaethon with the 1.6m Pirka Telescope: We report on optical polarimetric observations of two Apollo type near-Earth
asteroids, (422699) 2000 PD3 and (3200) Phaethon, and BVRI photometric
observations of 2000 PD3 using the 1.6m Pirka tele... | astro-ph_EP |
Orbital evolution under the action of fast interstellar gas flow with
non-constant drag coefficient: The acceleration of a spherical dust particle caused by an interstellar gas
flow depends on the drag coefficient which is, for the given particle and flow
of interstellar gas, a specific function of the relative speed... | astro-ph_EP |
Tilting Uranus via Secular Spin-Orbit Resonance with Planet 9: Uranus' startlingly large obliquity of 98 degrees has yet to admit a
satisfactory explanation. The most widely accepted hypothesis involving a giant
impactor that tipped Uranus onto its side encounters several difficulties with
regards to the Uranus' spin r... | astro-ph_EP |
Prospects for detecting decreasing exoplanet frequency with main
sequence age using PLATO: The space mission PLATO will usher in a new era of exoplanetary science by
expanding our current inventory of transiting systems and constraining host
star ages, which are currently highly uncertain. This capability might allow... | astro-ph_EP |
Higher Martian atmospheric temperatures at all altitudes increase the
D/H fractionation factor and water loss: Much of the water that once flowed on the surface of Mars was lost to space
long ago, and the total amount lost remains unknown. Clues to the amount lost
can be found by studying hydrogen (H) and its isotope... | astro-ph_EP |
Investigating Thermal Contrasts Between Jupiter's Belts, Zones, and
Polar Vortices with VLT/VISIR: Using images at multiple mid-infrared wavelengths, acquired in May 2018 using
the VISIR instrument on ESO's Very Large Telescope (VLT), we study Jupiter's
pole-to-pole thermal, chemical and aerosol structure in the trop... | astro-ph_EP |
The Direct Detectability of Giant Exoplanets in the Optical: Motivated by the possibility that a coronagraph will be put on WFIRST/AFTA,
we explore the direct detectability of extrasolar giant planets (EGPs) in the
optical. We quantify a planet's detectability by the fraction of its orbit for
which it is in an observab... | astro-ph_EP |
Tidal Distortions as a Bottleneck on Constraining Exoplanet Compositions: Improvements in the number of confirmed planets and the precision of
observations imply a need to better understand subtle effects that may bias
interpretations of exoplanet observations. One such effect is the distortion of
a short period planet... | astro-ph_EP |
Space based microlensing planet searches: The discovery of extra-solar planets is arguably the most exciting
development in astrophysics during the past 15 years, rivalled only by the
detection of dark energy. Two projects unite the communities of exoplanet
scientists and cosmologists: the proposed ESA M class mission ... | astro-ph_EP |
Comparison of different exoplanet mass detection limit methods using a
sample of main-sequence intermediate-type stars: The radial velocity (RV) technique is a powerful tool for detecting
extrasolar planets and deriving mass detection limits that are useful for
constraining planet pulsations and formation models. Det... | astro-ph_EP |
Equilibrium Configurations of Synchronous Binaries: Numerical Solutions
and Application to Kuiper-Belt Binary 2001 QG298: We present numerical computations of the equilibrium configurations of
tidally-locked homogeneous binaries, rotating in circular orbits. Unlike the
classical Roche approximations, we self-consiste... | astro-ph_EP |
Origin of craters on Phoebe: comparison with Cassini's data: Phoebe is one of the irregular satellites of Saturn; the images taken by
Cassini-Huygens spacecraft allowed us to analyze its surface and the craters on
it. We study the craters on Phoebe produced by Centaur objects from the
Scattered Disk (SD) and plutinos e... | astro-ph_EP |
Probing the Protosolar Disk Using Dust Filtering at Gaps in the Early
Solar System: Jupiter and Saturn formed early, before the gas disk dispersed. The presence
of gap-opening planets affects the dynamics of the gas and embedded solids and
halts the inward drift of grains above a certain size. A drift barrier can
exp... | astro-ph_EP |
Giant planets around two intermediate-mass evolved stars and
confirmation of the planetary nature of HIP67851 c: Precision radial velocities are required to discover and characterize planets
orbiting nearby stars. Optical and near infrared spectra that exhibit many
hundreds of absorption lines can allow the m/s preci... | astro-ph_EP |
A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest
Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud
Formation: We present the first exoplanet phase curve measurement made with the JWST
NIRSpec instrument, highlighting the exceptional stability of this
newly-commissioned... | astro-ph_EP |
Phosphine on Venus Cannot be Explained by Conventional Processes: The recent candidate detection of ~1 ppb of phosphine in the middle
atmosphere of Venus is so unexpected that it requires an exhaustive search for
explanations of its origin. Phosphorus-containing species have not been
modelled for Venus' atmosphere befo... | astro-ph_EP |
HATS-19b, HATS-20b, HATS-21b: Three Transiting Hot-Saturns Discovered by
the HATSouth Survey: We report the discovery by the HATSouth exoplanet survey of three hot-Saturn
transiting exoplanets: HATS-19b, HATS-20b, and HATS-21b. The planet host
HATS-19 is a slightly evolved V = 13.0 G0 star with [Fe/H] = 0.240, a mass... | astro-ph_EP |
Light Curve Analysis of Ground-Based Data from Exoplanets Transit
Database: Photometric observations of exoplanet transits can be used to derive the
orbital and physical parameters of an exoplanet. We analyzed several transit
light curves of exoplanets that are suitable for ground-based observations
whose complete in... | astro-ph_EP |
GJ 1252b: A Hot Terrestrial Super-Earth With No Atmosphere: The increasing numbers of rocky, terrestrial exoplanets known to orbit nearby
stars (especially M dwarfs) has drawn increased attention to the possibility of
studying these planets' surface properties, and atmospheric compositions &
escape histories. Here we r... | astro-ph_EP |
The role of planetary formation and evolution in shaping the composition
of exoplanetary atmospheres: Over the last twenty years, the search for extrasolar planets revealed us the
rich diversity of the outcomes of the formation and evolution of planetary
systems. In order to fully understand how these extrasolar plan... | astro-ph_EP |
Planetesimal fragmentation and giant planet formation: the role of
planet migration: In the standard model of core accretion, the cores of the giant planets form
by the accretion of planetesimals. In this scenario, the evolution of the
planetesimal population plays an important role in the formation of massive
cores.... | astro-ph_EP |
OSSOS: IV. Discovery of a dwarf planet candidate in the 9:2 resonance
with Neptune: We report the discovery and orbit of a new dwarf planet candidate, 2015
RR$_{245}$, by the Outer Solar System Origins Survey (OSSOS). 2015 RR$_{245}$'s
orbit is eccentric ($e=0.586$), with a semi-major axis near 82 au, yielding a
peri... | astro-ph_EP |
A New Desalination Pump Help Define the pH of Ocean Worlds: We study ocean exoplanets, for which the global surface ocean is separated
from the rocky interior by a high-pressure ice mantle. We describe a mechanism
that can pump salts out of the ocean, resulting in oceans of very low salinity.
Here we focus on the H2O-N... | astro-ph_EP |
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