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A new analysis of the GJ581 extrasolar planetary system: We have done a new analysis of the available observations for the GJ581
exoplanetary system. Today this system is controversial due to choices that can
be done in the orbital determination. The main ones are the ocurrence of
aliases and the additional bodies - th... | astro-ph_EP |
Null transit detections of 68 radial velocity exoplanets observed by
TESS: In recent years the number of exoplanets has grown considerably. The most
successful techniques in these detections are the radial velocity (RV) and
planetary transits techniques, the latter significantly advanced by the Kepler,
K2 and, more r... | astro-ph_EP |
Reflected spectroscopy of small exoplanets III: probing the UV band to
measure biosignature gasses: Direct-imaging observations of terrestrial exoplanets will enable their
atmospheric characterization and habitability assessment. Considering the
Earth, the key atmospheric signatures for the biosphere is O$_2$ and the... | astro-ph_EP |
Isotope velocimetry: Experimental and theoretical demonstration of the
potential importance of gas flow for isotope fractionation during evaporation
of protoplanetary material: We use new experiments and a theoretical analysis of the results to show that
the isotopic fractionation associated with laser-heating aero... | astro-ph_EP |
CRISM south polar mapping: First Mars year of observations: We report on mapping of the south polar region of Mars using data from the
Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument. Our
observations have led to the following discoveries: 1. Water ice is present in
the form of pole-circling clo... | astro-ph_EP |
Nano dust impacts on spacecraft and boom antenna charging: High rate sampling detectors measuring the potential difference between the
main body and boom antennas of interplanetary spacecraft have been shown to be
efficient means to measure the voltage pulses induced by nano dust impacts on
the spacecraft body itself (... | astro-ph_EP |
Long term evolution of planetary systems with a terrestrial planet and a
giant planet: We study the long term orbital evolution of a terrestrial planet under the
gravitational perturbations of a giant planet. In particular, we are interested
in situations where the two planets are in the same plane and are relatively... | astro-ph_EP |
Fuzzy Characterization of Near-Earth-Asteroids: Due to close encounters with the inner planets, Near-Earth-Asteroids (NEAs)
can have very chaotic orbits. Because of this chaoticity, a statistical
treatment of the dynamical properties of NEAs becomes difficult or even
impossible. We propose a new way to classify NEAs by... | astro-ph_EP |
Observability of Debris Discs around M-stars: Debris discs are second generation dusty discs formed by collisions of
planetesimals. Many debris discs have been found and resolved around hot and
solar-type stars. However, only a handful have been discovered around M-stars,
and the reasons for their paucity remain unclea... | astro-ph_EP |
Super stellar abundances of alkali metals suggest significant migration
for Hot Jupiters: We investigate the origin of the measured over-abundance of alkali metals in
the atmospheres of hot gas giants, relative to both their host stars and their
atmospheric water abundances. We show that formation exterior to the wat... | astro-ph_EP |
Polarimetric Study of Near-Earth Asteroid (1566) Icarus: We conducted a polarimetric observation of the fast-rotating near-Earth
asteroid (1566) Icarus at large phase (Sun-asteroid-observer's) angles
$\alpha$= 57 deg--141deg around the 2015 summer solstice. We found that the
maximum values of the linear polarization de... | astro-ph_EP |
A Fireball and Potentially Hazardous Binary Near-Earth Asteroid (164121)
2003 YT$_1$: We present a fireball detected in the night sky over Kyoto, Japan on UT 2017
April 28 at ${\rm 15^{h}\,58^{m}\,19^{s}}$ by the SonotaCo Network. The
absolute visual magnitude is $M_{\rm v}$=$-$4.10$\pm$0.42mag. Luminous light
curves... | astro-ph_EP |
A 4565 Myr old andesite from an extinct chondritic protoplanet: The age of iron meteorites implies that accretion of protoplanets began
during the first millions of years of the solar system. Due to the heat
generated by 26Al decay, many early protoplanets were fully differentiated with
an igneous crust produced during... | astro-ph_EP |
Synchronous Satellites of Venus: Synchronous satellites of Venus have long been thought unstable, but we use
Poincare's surface of section technique to show that synchronous
quasi-satellites orbiting just outside Venus' Hill sphere are quite stable, at
least for centuries. Such synchrosats always remain within a few de... | astro-ph_EP |
Atomic iron and nickel in the coma of C/1996 B2 (Hyakutake): production
rates, emission mechanisms, and possible parents: Two papers recently reported the detection of gaseous nickel and iron in the
comae of over 20 comets from observations collected over two decades, including
interstellar comet 2I/Borisov. To evalu... | astro-ph_EP |
Solar wind dynamics around a comet - A 2D semi-analytical kinetic model: We aim at analytically modelling the solar wind proton trajectories during
their interaction with a partially ionised cometary atmosphere, not in terms of
bulk properties of the flow but in terms of single particle dynamics. We first
derive a gene... | astro-ph_EP |
Deep Pa$β$ Imaging of the Candidate Accreting Protoplanet AB Aur b: Giant planets grow by accreting gas through circumplanetary disks, but little
is known about the timescale and mechanisms involved in the planet assembly
process because few accreting protoplanets have been discovered. Recent visible
and infrared (IR) ... | astro-ph_EP |
Expected Fragment Distribution from the First Interstellar Meteor CNEOS
2014-01-08: In 2014, the fireball of the first interstellar meteor CNEOS 2014-01-08 (IM1)
(Siraj & Loeb 2019), was detected off the northern coast of Papua New Guinea. A
recently announced ocean expedition will retrieve any extant fragments by
to... | astro-ph_EP |
On the Earth's tidal perturbations for the LARES satellite: Frame dragging, one of the outstanding phenomena predicted by General
Relativity, is efficiently studied by means of the laser-ranged satellites
LARES, LAGEOS and LAGEOS 2. The accurate analysis of the orbital perturbations
of Earth's solid and ocean tides has... | astro-ph_EP |
Three faint-source microlensing planets detected via resonant-caustic
channel: We conducted a project of reinvestigating the 2017--2019 microlensing data
collected by the high-cadence surveys with the aim of finding planets that were
missed due to the deviations of planetary signals from the typical form of
short-ter... | astro-ph_EP |
An enhanced slope in the transmission spectrum of the hot Jupiter
WASP-104b: We present the optical transmission spectrum of the hot Jupiter WASP-104b
based on one transit observed by the blue and red channels of the DBSP
spectrograph at the Palomar 200-inch telescope and 14 transits observed by the
MuSCAT2 four-chan... | astro-ph_EP |
Theoretical transmission spectra of exoplanet atmospheres with
hydrocarbon haze: Effect of creation, growth, and settling of haze particles.
I. Model description and first results: Recently, properties of exoplanet atmospheres have been constrained via
multi-wavelength transit observation, which measures an apparen... | astro-ph_EP |
Aerosols optical properties in Titan's Detached Haze Layer before the
equinox: UV observations with Cassini ISS Narrow Angle Camera of Titan's detached haze
is an excellent tool to probe its aerosols content without being affected by
the gas or the multiple scattering. Unfortunately, its low extent in altitude
requir... | astro-ph_EP |
A Flat Inner Disk Model as an Alternative to the Kepler Dichotomy in the
Q1 to Q16 Planet Population: We use simulated planetary systems to model the planet multiplicity of Kepler
stars. Previous studies have underproduced single planet systems and invoked
the so called Kepler dichotomy, where the planet forming abil... | astro-ph_EP |
Defining the Flora Family: Orbital Properties, Reflectance Properties
and Age: The Flora family resides in the densely populated inner main belt, bounded in
semimajor axis by the $\nu_6$ secular resonance and the Jupiter 3:1 mean motion
resonance. The presence of several large families that overlap dynamically with
t... | astro-ph_EP |
HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and
Observational Evidence for the Re-Inflation of Close-In Giant Planets: We present the discovery of the transiting exoplanets HAT-P-65b and
HAT-P-66b, with orbital periods of 2.6055 d and 2.9721 d, masses of $0.527 \pm
0.083$ M$_{J}$ and $0.783 \pm 0.05... | astro-ph_EP |
Origin of the peculiar eccentricity distribution of the inner cold
Kuiper belt: Dawson and Murray-Clay (2012) pointed out that the inner part of the cold
population in the Kuiper belt (that with semi major axis a<43.5 AU) has orbital
eccentricities significantly smaller than the limit imposed by stability
constraints... | astro-ph_EP |
Stellar Spin-Orbit Alignment for Kepler-9, a Multi-transiting Planetary
system with Two Outer Planets Near 2:1 Resonance: We present spectroscopic measurements of the Rossiter-McLaughlin effect for
the planet b of Kepler-9 multi-transiting planet system. The resulting
sky-projected spin-orbit angle is $\lambda=-13^{\... | astro-ph_EP |
An Observational Diagnostic for Distinguishing Between Clouds and Haze
in Hot Exoplanet Atmospheres: The nature of aerosols in hot exoplanet atmospheres is one of the primary
vexing questions facing the exoplanet field. The complex chemistry, multiple
formation pathways, and lack of easily identifiable spectral featu... | astro-ph_EP |
Exoplanetary Spin-Orbit Alignment: Results from the Ensemble of
Rossiter-McLaughlin Observations: One possible diagnostic of planet formation, orbital migration, and tidal
evolution is the angle psi between a planet's orbital axis and the spin axis of
its parent star. In general, psi cannot be measured, but for trans... | astro-ph_EP |
Crowding Out of Giants by Dwarfs: An Origin for the Lack of Companion
Planets in Hot Jupiter Systems: We investigate formation of close-in terrestrial planets from planetary
embryos under the influence of a hot Jupiter (HJ) using gravitational N-body
simulations that include gravitational interactions between the gas... | astro-ph_EP |
Transit detections of extrasolar planets around main-sequence stars - I.
Sky maps for hot Jupiters: The findings of more than 350 extrasolar planets, most of them nontransiting
Hot Jupiters, have revealed correlations between the metallicity of the
main-sequence (MS) host stars and planetary incidence. This connectio... | astro-ph_EP |
Neptune on tiptoes: dynamical histories that preserve the cold classical
Kuiper belt: The current dynamical structure of the Kuiper belt was shaped by the orbital
evolution of the giant planets, especially Neptune, during the era following
planet formation, when the giant planets may have undergone planet-planet
scat... | astro-ph_EP |
Gran Telescopio Canarias OSIRIS Transiting Exoplanet Atmospheric Survey:
Detection of potassium in XO-2b from narrowband spectrophotometry: We present Gran Telescopio Canarias (GTC) optical transit narrow-band
photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This
unique instrument has the ca... | astro-ph_EP |
Vertically resolved magma ocean-protoatmosphere evolution: H$_2$,
H$_2$O, CO$_2$, CH$_4$, CO, O$_2$, and N$_2$ as primary absorbers: The earliest atmospheres of rocky planets originate from extensive volatile
release during magma ocean epochs that occur during assembly of the planet.
These establish the initial distr... | astro-ph_EP |
A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets: Kepler has discovered hundreds of systems with multiple transiting exoplanets
which hold tremendous potential both individually and collectively for
understanding the formation and evolution of planetary systems. Many of these
systems consist of m... | astro-ph_EP |
2001 QR322: a dynamically unstable Neptune Trojan?: Since early work on the stability of the first Neptunian Trojan, 2001 QR322,
suggested that it was a dynamically stable, primordial body, it has been
assumed this applies to both that object, and its more recently discovered
brethren. However, it seems that things are... | astro-ph_EP |
Expanding Mars Climate Modeling: Interpretable Machine Learning for
Modeling MSL Relative Humidity: For the past several decades, numerous attempts have been made to model the
climate of Mars with extensive studies focusing on the planet's dynamics and
the understanding of its climate. While physical modeling and dat... | astro-ph_EP |
Mass-Radius Relation for Rocky Planets based on PREM: Several small dense exoplanets are now known, inviting comparisons to Earth
and Venus. Such comparisons require translating their masses and sizes to
composition models of evolved multi-layer-interior planets. Such theoretical
models rely on our understanding of the... | astro-ph_EP |
Orbit injection of planet-crossing asteroids: Solar system Centaurs originate in transneptunian space from where planet
orbit crossing events inject their orbits inside the giant planets' domain.
Here, we examine this injection process in the three-body problem by studying
the orbital evolution of transneptunian astero... | astro-ph_EP |
On a Possible Giant Impact Origin for the Colorado Plateau: It is proposed and substantiated that an extraterrestrial object of the
approximate size and mass of Planet Mars, impacting the Earth in grazing
incidence along an approximately N-NE to S-SW route with respect to the current
orientation of the North America co... | astro-ph_EP |
TraMoS project III: Improved physical parameters, timing analysis, and
star-spot modelling of the WASP-4b exoplanet system from 38 transit
observations: We report twelve new transit observations of the exoplanet WASP-4b from the
Transit Monitoring in the South Project (TraMoS) project. These transits are
combined w... | astro-ph_EP |
Very wide companion fraction from Gaia DR2: a weak or no enhancement for
hot jupiter hosts, and a strong enhancement for contact binaries: There is an ongoing debate on whether hot jupiter hosts are more likely to be
found in wide binaries with separations of $\gtrsim 100$ AU. In this paper, we
search for comoving, v... | astro-ph_EP |
NELIOTA Lunar Impact Flash Detection and Event Validation: NELIOTA (NEO Lunar Impacts and Optical TrAnsients) is an ESA-funded lunar
monitoring project, which aims to determine the size-frequency distribution of
small Near-Earth Objects (NEOs) via detection of impact flashes on the surface
of the Moon. A prime focus, h... | astro-ph_EP |
The impact of the Kasatochi eruption on the Moon's illumination during
the August 2008 lunar eclipse: The Moon's changeable aspect during a lunar eclipse is largely attributable
to variations in the refracted unscattered sunlight absorbed by the terrestrial
atmosphere that occur as the satellite crosses the Earth's s... | astro-ph_EP |
TESS Input Catalog versions 8.1 and 8.2: Phantoms in the 8.0 Catalog and
How to Handle Them: We define various types of "phantom" stars that may appear in the TESS Input
Catalog (TIC), and provide examples and lists of currently known cases. We
present a methodology that can be used to check for phantoms around any o... | astro-ph_EP |
Tidal Heating Models for the Radii of the Inflated Transiting Giant
Planets WASP-4b, WASP-6b, WASP-12b, and TrES-4: In order to explain the inflated radii of some transiting extrasolar giant
planets, we investigate a tidal heating scenario for the inflated planets
WASP-4b, WASP-6b, WASP-12b, WASP-15b, and TrES-4. To ... | astro-ph_EP |
The Solar Twin Planet Search. V. Close-in, low-mass planet candidates
and evidence of planet accretion in the solar twin HIP 68468: [Methods]. We obtained high-precision radial velocities with HARPS on the ESO
3.6 m telescope and determined precise stellar elemental abundances (~0.01 dex)
using MIKE spectra on the Ma... | astro-ph_EP |
A Twilight Search for Atiras, Vatiras and Co-orbital Asteroids:
Preliminary Results: Near-Earth Objects (NEOs) that orbit the Sun on or within Earth's orbit are
tricky to detect for Earth-based observers due to their proximity to the Sun in
the sky. These small bodies hold clues to the dynamical history of the inner
... | astro-ph_EP |
Gaussian Processes and Nested Sampling Applied to Kepler's Small
Long-period Exoplanet Candidates: There are more than 5000 confirmed and validated planets beyond the solar
system to date, more than half of which were discovered by NASA's Kepler
mission. The catalog of Kepler's exoplanet candidates has only been exte... | astro-ph_EP |
Transit Timing Observations from Kepler: VI. Potentially interesting
candidate systems from Fourier-based statistical tests: We analyze the deviations of transit times from a linear ephemeris for the
Kepler Objects of Interest (KOI) through Quarter six (Q6) of science data. We
conduct two statistical tests for all KO... | astro-ph_EP |
The first super-Earth Detection from the High Cadence and High Radial
Velocity Precision Dharma Planet Survey: The Dharma Planet Survey (DPS) aims to monitor about 150 nearby very bright
FGKM dwarfs (within 50 pc) during 2016$-$2020 for low-mass planet detection and
characterization using the TOU very high resolution... | astro-ph_EP |
Dust Ejection from Planetary Bodies by Temperature Gradients: Laboratory
Experiments: Laboratory experiments show that dusty bodies in a gaseous environment eject
dust particles if they are illuminated. We find that even more intense dust
eruptions occur when the light source is turned off. We attribute this to a
com... | astro-ph_EP |
EPIC247098361b: a transiting warm Saturn on an eccentric $P=11.2$ days
orbit around a $V=9.9$ star: We report the discovery of EPIC247098361b using photometric data of the
Kepler K2 satellite coupled with ground-based spectroscopic observations.
EPIC247098361b has a mass of M$_{P}=0.397\pm 0.037$ M$_J$, a radius of
R... | astro-ph_EP |
Identification and characterization of the host stars in planetary
microlensing with ELTs: Microlensing offers a unique opportunity to probe exoplanets that are
temperate and beyond the snow line, as small as Jovian satellites, at
extragalactic distance, and even free floating exoplanets, regimes where the
sensitivit... | astro-ph_EP |
Meteorites and the RNA World: A Thermodynamic Model of Nucleobase
Synthesis within Planetesimals: The possible meteorite parent body origin of Earth's pregenetic nucleobases
is substantiated by the guanine (G), adenine (A) and uracil (U) measured in
various meteorites. Cytosine (C) and thymine (T) however are absent ... | astro-ph_EP |
Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN$_{35}$ Across
a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid: Studying small near-Earth asteroids is important to understand their
dynamical histories and origins as well as to mitigate the damage of the
asteroid impact to the Earth.... | astro-ph_EP |
On the Method to Infer an Atmosphere on a Tidally-Locked Super Earth
Exoplanet and Upper limits to GJ 876d: We develop a method to infer or rule out the presence of an atmosphere on a
tidally-locked hot super Earth. The question of atmosphere retention is a
fundamental one, especially for planets orbiting M stars due... | astro-ph_EP |
Orbit determination methods for interplanetary missions: development and
use of the Orbit14 software: In the last years, a new generation of interplanetary space missions have
been designed for the exploration of the solar system. At the same time,
radio-science instrumentation has reached an unprecedented level of a... | astro-ph_EP |
Hints on the origins of particle traps in protoplanetary disks given by
the $M_{\rm{dust}}-M_{\star}$ relation: Demographic surveys of protoplanetary disks, carried out mainly with ALMA,
have provided access to a large range of disk dust masses ($M_{\rm{dust}}$)
around stars with different stellar types and in differ... | astro-ph_EP |
Disintegration of Long-Period Comet C/2021 A1 (Leonard): We present imaging observations of the disintegrating long-period comet
C/2021 A1 (Leonard). High resolution observations with Hubble Space Telescope
show no evidence for surviving fragments, and place a 3 sigma upper limit to
their possible radius about 60 m (al... | astro-ph_EP |
Photophoresis in the circumjovian disk and its impact on the orbital
configuration of the Galilean satellites: Jupiter has four large regular satellites called the Galilean satellites: Io,
Europa, Ganymede, and Callisto. The inner three of the Galilean satellites
orbit in a 4:2:1 mean motion resonance; therefore thei... | astro-ph_EP |
Obliquities of "Top-Shaped" Asteroids May Not Imply Reshaping by YORP
Spin-up: The timescales over which the YORP effect alters the rotation period and the
obliquity of a small asteroid can be very different, because the corresponding
torques couple to different aspects of the object's shape. For nearly
axisymmetric,... | astro-ph_EP |
Probable Spin-Orbit Aligned Super-Earth Planet Candidate KOI-2138.01: We use rotational gravity darkening in the disk of \emph{Kepler} star
KOI-2138 to show that the orbit of $2.1-R_\oplus$ transiting planet candidate
KOI-2138.01 has a low projected spin-orbit alignment of $\lambda=1^\circ\pm13$.
KOI-2138.01 is just th... | astro-ph_EP |
Interplanetary Laser Tri-lateration Network: simulation with INPOP
planetary ephemerides: This study is done in the context of the project titled Interplanetary Laser
Tri-lateration Network (ILTN) proposed by \cite{2018P&SS..153..127S} and
investigated more in details by \cite{2022P&SS..21405415B} and
\cite{2022P&SS.... | astro-ph_EP |
Microlensed Radio Emission from Exoplanets: In this paper, we investigate the detectability of radio emission from
exoplanets, especially hot Jupiters, which are magnified by gravitational
microlensing. Because hot Jupiters have orbital periods much shorter than the
characteristic timescale of microlensing, the magnifi... | astro-ph_EP |
Earth as an Exoplanet. III. Using Empirical Thermal Emission Spectra as
Input for Atmospheric Retrieval of an Earth-Twin Exoplanet: In this study, we treat Earth as an exoplanet and investigate our home planet
by means of a potential future mid-infrared (MIR) space mission called the
Large Interferometer For Exoplane... | astro-ph_EP |
A Potential Aid in the Target Selection for the Comet Interceptor
Mission: The upcoming Comet Interceptor mission involves a parking phase around the
Sun-Earth L2 point before transferring to intercept the orbit of a long period
comet, interstellar object or a back-up target in the form of a short-period
comet. The t... | astro-ph_EP |
Reduced atmospheres of post-impact worlds: The early Earth: Impacts may have had a significant effect on the atmospheric chemistry of the
early Earth. Reduced phases in the impactor (e.g., metallic iron) can reduce
the planet's H$_2$O inventory to produce massive atmospheres rich in H$_2$.
Whilst previous studies have ... | astro-ph_EP |
Composition of Terrestrial Exoplanet Atmospheres from Meteorite
Outgassing Experiments: Terrestrial exoplanets likely form initial atmospheres through outgassing
during and after accretion, although there is currently no first-principles
understanding of how to connect a planet's bulk composition to its early
atmosph... | astro-ph_EP |
Is there a background population of high-albedo objects in
geosynchronous orbits around Earth?: Old, digitized astronomical images taken before the human spacefaring age
offer a unique view of the sky devoid of known artificial satellites. In this
paper, we have carried out the first optical searches ever for non-ter... | astro-ph_EP |
Short-term variability on the surface of (1) Ceres. A changing amount of
water ice?: Context: The dwarf planet (1) Ceres - next target of the NASA Dawn mission -
is the largest body in the asteroid main belt; although several observations of
this body have been performed so far, the presence of surface water ice is
s... | astro-ph_EP |
Spin Evolution and Cometary Interpretation of the Interstellar Minor
Object 1I/2017 'Oumuamua: Observations of the first interstellar minor object 1I/2017 'Oumuamua did not
reveal direct signs of outgassing that would have been natural if it had
volatile-rich composition. However, a recent measurement by Micheli et a... | astro-ph_EP |
Probing the inner boundaries of Saturn's A ring with the Iapetus -1:0
nodal bending wave: The Iapetus -1:0 nodal bending wave, the first spiral wave ever described in
Saturn's rings, has been seen again for the first time in 29 years. We
demonstrate that it is in fact the nodal bending wave, not the 1:0 apsidal
densi... | astro-ph_EP |
The International Deep Planet Survey II: The frequency of directly
imaged giant exoplanets with stellar mass: Radial velocity and transit methods are effective for the study of short
orbital period exoplanets but they hardly probe objects at large separations
for which direct imaging can be used. We carried out the i... | astro-ph_EP |
Modeling of the zodiacal emission for the AKARI/IRC mid-infrared all-sky
diffuse maps: The zodiacal emission, which is the thermal infrared (IR) emission from the
interplanetary dust (IPD) in our Solar System, has been studied for a long
time. Nevertheless, accurate modeling of the zodiacal emission has not been
succ... | astro-ph_EP |
The 8 Micron Phase Variation of the Hot Saturn HD 149026b: We monitor the star HD 149026 and its Saturn-mass planet at 8.0 micron over
slightly more than half an orbit using the Infrared Array Camera (IRAC) on the
Spitzer Space Telescope. We find an increase of 0.0227% +/- 0.0066% (3.4 sigma
significance) in the combin... | astro-ph_EP |
VUV-absorption cross section of carbon dioxide from 150 to 800 K and
applications to warm exoplanetary atmospheres: Most exoplanets detected so far have atmospheric T significantly higher than
300K. Often close to their star, they receive an intense UV photons flux that
triggers important photodissociation processes.... | astro-ph_EP |
Saturn Ring Seismology: Evidence for Stable Stratification in the Deep
Interior of Saturn: Seismology allows for direct observational constraints on the interior
structures of stars and planets. Recent observations of Saturn's ring system
have revealed the presence of density waves within the rings excited by
oscilla... | astro-ph_EP |
Uranus at equinox: Cloud morphology and dynamics: As the 7 December 2007 equinox of Uranus approached, ring and atmosphere
observers produced a substantial collection of observations using the 10-m Keck
telescope and the Hubble Space Telescope. Those spanning the period from 7 June
2007 through 9 September 2007 we used... | astro-ph_EP |
Constraining the oblateness of transiting planets with photometry and
spectroscopy: Rapid planetary rotation can cause the equilibrium shape of a planet to be
oblate. While planetary oblateness has mostly been probed by examining the
subtle ingress and egress features in photometric transit light curves, we
investiga... | astro-ph_EP |
The Dynamics of Co-orbital Giant Exomoons -- Applications for the
Kepler-1625 b and Kepler-1708 b Satellite Systems: Exomoons are a missing piece of exoplanetary science. Recently, two promising
candidates were proposed, Kepler-1625 b-I and Kepler-1708 b-I. While the latter
still lacks a dynamical analysis of its sta... | astro-ph_EP |
Desorption Kinetics and Binding Energies of Small Hydrocarbons: Small hydrocarbons are an important organic reservoir in protostellar and
protoplanetary environments. Constraints on desorption temperatures and binding
energies of such hydrocarbons are needed for accurate predictions of where
these molecules exist in th... | 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 |
Lie-series for orbital elements -- I. The planar case: Lie-integration is one of the most efficient algorithms for numerical
integration of ordinary differential equations if high precision is needed for
longer terms. The method is based on the computation of the Taylor-coefficients
of the solution as a set of recurren... | astro-ph_EP |
Radial Velocity Discovery of an Eccentric Jovian World Orbiting at 18 au: Based on two decades of radial velocity (RV) observations using Keck/HIRES
and McDonald/Tull, and more recent observations using the Automated Planet
Finder, we found that the nearby star HR 5183 (HD 120066) hosts a 3$M_J$
minimum mass planet wit... | astro-ph_EP |
Galactic tide and secular orbital evolution: Equation of motion for the galactic tide is treated for the case of a comet
situated in the Oort cloud of comets. We take into account that galactic
potential and mass density depend on a distance from the galactic equator and
on a distance from the rotational axis of the Ga... | astro-ph_EP |
Mony a Mickle Maks a Muckle: Minor Body Observations with Optical
Telescopes of All Sizes: I review the current capabilities of small, medium and large telescopes in
the study of minor bodies of the Solar System (MBOSS), with the goal of
identifying those areas where the next generation of Extremely Large Telescopes
... | 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 |
Andrade rheology in time-domain. Application to Enceladus' dissipation
of energy due to forced libration: The main purpose of this work is to present a time-domain implementation of
the Andrade rheology, instead of the traditional expansion in terms of a
Fourier series of the tidal potential. This approach can be use... | astro-ph_EP |
Understanding the Planetary Formation and Evolution in Star
Clusters(UPiC)-I: Evidence of Hot Giant Exoplanets Formation Timescales: Planets in young star clusters could shed light on planet formation and
evolution since star clusters can provide accurate age estimation. However, the
number of transiting planets dete... | astro-ph_EP |
A Survey of CO, CO2, and H2O in Comets and Centaurs: CO and CO$_2$ are the two dominant carbon-bearing molecules in comae and have
major roles in driving activity. Their relative abundances also provide strong
observational constraints to models of solar system formation and evolution but
have never been studied togeth... | astro-ph_EP |
The PHOENIX Exoplanet Retrieval Algorithm and Using H$^{-}$ Opacity as a
Probe in Ultra-hot Jupiters: Atmospheric retrievals are now a standard tool to analyze observations of
exoplanet atmospheres. This data-driven approach quantitatively compares
atmospheric models to observations in order to estimate atmospheric p... | astro-ph_EP |
Effect of near-earth thunderstorms electric field on the intensity of
ground cosmic ray positrons/electrons in Tibet: Monte Carlo simulations are performed to study the correlation between the
ground cosmic ray intensity and near-earth thunderstorms electric field at YBJ
(4300 m a.s.l., Tibet, China). The variations ... | astro-ph_EP |
ALMA Images the Eccentric HD 53143 Debris Disk: We present ALMA 1.3 mm observations of the HD~53143 debris disk - the first
infrared or millimeter image produced of this ~1 Gyr-old solar-analogue.
Previous HST STIS coronagraphic imaging did not detect flux along the minor
axis of the disk which could suggest a face-on ... | astro-ph_EP |
Two Strengths of Ordinary Chondritic Meteoroids as Derived from their
Atmospheric Fragmentation Modeling: The internal structure and strength of small asteroids and large meteoroids
is poorly known. Observation of bright fireballs in the Earth's atmosphere can
prospect meteoroid structure by studying meteoroid fragme... | astro-ph_EP |
Planet Occurrence Rate Correlated to Stellar Dynamical History: Evidence
from Kepler and Gaia: The dynamical history of stars influences the formation and evolution of
planets significantly. To explore the influence of dynamical history on planet
formation and evolution from observations, we assume that stars who exp... | astro-ph_EP |
A roadmap to the efficient and robust characterization of temperate
terrestrial planet atmospheres with JWST: Ultra-cool dwarf stars are abundant, long-lived, and uniquely suited to
enable the atmospheric study of transiting terrestrial companions with JWST.
Amongst them, the most prominent is the M8.5V star TRAPPIST... | astro-ph_EP |
Thermal structure of circumbinary discs: Circumbinary planets should be
icy not rocky: The process of forming a circumbinary planet is thought to be intimately
related to the structure of the nascent circumbinary disc. It has been shown
that the structure of a circumbinary disc depends strongly on 3-dimensional
effec... | astro-ph_EP |
Astrometric follow-up observations of directly imaged sub-stellar
companions to young stars and brown dwarfs: The formation of massive planetary or brown dwarf companions at large
projected separations from their host star is not yet well understood. In order
to put constraints on formation scenarios we search for si... | astro-ph_EP |
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