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On the Need for a Classification System for Consistent Characterization
of the Composition of Planetary Bodies: A classification system is presented for characterizing the composition of
planetary bodies. From mass-radius and mass-density relationships, planets may
be broadly grouped into five composition classes ide... | astro-ph_EP |
A shortcut to calculate SPAM limb-darkening coefficients: We release a new grid of stellar limb-darkening coefficients (LDCs, using the
quadratic, power-2 and claret-4 laws) and intensity profiles for the Kepler, U,
B, V and R passbands, based on STAGGER model atmospheres. The data can be
downloaded from Zenodo (doi:10... | astro-ph_EP |
The Oblique Orbit of WASP-107b from K2 Photometry: Observations of nine transits of WASP-107 during the {\it K2} mission reveal
three separate occasions when the planet crossed in front of a starspot. The
data confirm the stellar rotation period to be 17 days --- approximately three
times the planet's orbital period --... | astro-ph_EP |
Shape models and spin states of Jupiter Trojans: Testing the streaming
instability formation scenario: The leading theory for the origin of Jupiter Trojans (JTs) assumes that JTs
were captured to their orbits near the Lagrangian points of Jupiter during the
early reconfiguration of the giant planets. The natural sour... | astro-ph_EP |
Debris disks as signposts of terrestrial planet formation: Circumstantial evidence suggests that most known extra-solar planetary
systems are survivors of violent dynamical instabilities. Here we explore how
giant planet instabilities affect the formation and survival of terrestrial
planets. We simulate planetary syste... | astro-ph_EP |
Radial Transport of Large-Scale Magnetic Fields in Accretion Disks. I.
Steady Solutions and an Upper Limit on the Vertical Field Strength: Large-scale magnetic fields are key ingredients of magnetically driven disk
accretion. We study how large-scale poloidal fields evolve in accretion disks,
with the primary aim of ... | astro-ph_EP |
Composition of Massive Giant Planets: The two current models for giant planet formation are core accretion and disk
instability. We discuss the core masses and overall planetary enrichment in
heavy elements predicted by the two formation models, and show that both models
could lead to a large range of final composition... | astro-ph_EP |
3D shape of asteroid (6)~Hebe from VLT/SPHERE imaging: Implications for
the origin of ordinary H chondrites: Context. The high-angular-resolution capability of the new-generation
ground-based adaptive-optics camera SPHERE at ESO VLT allows us to assess, for
the very first time, the cratering record of medium-sized (D... | astro-ph_EP |
Binary planetesimals and their role in planet formation: One of the main evolutionary stages of planet formation is the dynamical
evolution of planetesimal disks. These disks are thought to evolve through
gravitational encounters and physical collisions between single planetesimals.
In recent years, many binary planete... | 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 |
The DEdicated MONitor of EXotransits (DEMONEX): Seven Transits of XO-4b: The DEdicated MONitor of EXotransits (DEMONEX) was a 20 inch robotic and
automated telescope to monitor bright stars hosting transiting exoplanets to
discover new planets and improve constraints on the properties of known
transiting planetary syst... | astro-ph_EP |
Collisional Charging in the Low Pressure Range of Protoplanetary Disks: In recent years, collisional charging has been proposed to promote the growth
of pebbles in early phases of planet formation. Ambient pressure in
protoplanetary disks spans a wide range from below $10^{-9}$ mbar up to way
beyond mbar. Yet, experime... | astro-ph_EP |
Near-Ultraviolet Absorption Distribution of Primitive Asteroids from
Spectrophotometric Surveys: Aims: Our objectives were first to evaluate the possibility for using the NUV
absorption as diagnostics of hydrated minerals based on the recent datasets of
primitive asteroids and hydrated carbonaceous chondrites, and se... | astro-ph_EP |
Coplanar circumbinary planets can be unstable to large tilt oscillations
in the presence of an inner polar planet: Mutually misaligned circumbinary planets may form in a warped or broken gas
disc or from later planet-planet interactions. With numerical simulations and
analytic estimates we explore the dynamics of two... | astro-ph_EP |
Transmission spectroscopy of the inflated exoplanet WASP-52b, and
evidence for a bright region on the stellar surface: We have measured the transmission spectrum of the extremely inflated hot
Jupiter WASP-52b using simultaneous photometric observations in SDSS u', g' and
a filter centred on the sodium doublet (NaI) w... | astro-ph_EP |
HATS-4b: A Dense Hot-Jupiter Transiting a Super Metal-Rich G Star: We report the discovery by the HATSouth survey of HATS-4b, an extrasolar
planet transiting a V=13.46 mag G star. HATS-4b has a period of P = 2.5167 d,
mass of Mp = 1.32 Mj, radius of Rp = 1.02 Rj and density of rho_p = 1.55 +-
0.16 g/cm^3 ~ 1.24 rhoj. T... | astro-ph_EP |
WASP-180Ab: Doppler tomography of an hot Jupiter orbiting the primary
star in a visual binary: We report the discovery and characterisation of WASP-180Ab, a hot Jupiter
confirmed by the detection of its Doppler shadow and by measuring its mass
using radial velocities. We find the 0.9 $\pm$ 0.1 $M_{\rm Jup}$, 1.24 $\p... | astro-ph_EP |
Kepler's Earth-like Planets Should Not Be Confirmed Without Independent
Detection: The Case of Kepler-452b: We show that the claimed confirmed planet Kepler-452b (a.k.a. K07016.01, KIC
8311864) can not be confirmed using a purely statistical validation approach.
Kepler detects many more periodic signals from instrume... | astro-ph_EP |
Interior Models of Saturn: Including the Uncertainties in Shape and
Rotation: The accurate determination of Saturn's gravitational coefficients by Cassini
could provide tighter constrains on Saturn's internal structure. Also,
occultation measurements provide important information on the planetary shape
which is often... | astro-ph_EP |
The Exomoon Corridor: Half of all exomoons exhibit TTV frequencies
within a narrow window due to aliasing: Exomoons are expected to produce potentially detectable transit timing
variations (TTVs) upon their parent planet. Unfortunately, distinguishing
moon-induced TTVs from other sources, in particular planet-planet ... | astro-ph_EP |
Can Ground-based Telescopes Detect The Oxygen 1.27 Micron Absorption
Feature as a Biomarker in Exoplanets ?: The oxygen absorption line imprinted in the scattered light from the
Earth-like planets has been considered the most promising metabolic biomarker
of the exo-life. We examine the feasibility of the detection o... | astro-ph_EP |
Dusty tails of evaporating exoplanets. II. Physical modelling of the KIC
12557548b light curve: Evaporating rocky exoplanets, such as KIC 12557548b, eject large amounts of
dust grains, which can trail the planet in a comet-like tail. When such objects
occult their host star, the resulting transit signal contains info... | astro-ph_EP |
Gamma Ray Bursts: Not so Much Deadlier than We Thought: We analyze the additional effect on planetary atmospheres of recently
detected gamma-ray burst afterglow photons in the range up to 1 TeV. For an
Earth-like atmosphere we find that there is a small additional depletion in
ozone versus that modeled for only prompt ... | astro-ph_EP |
Accretion onto a binary from a polar circumbinary disc: We present hydrodynamical simulations to model the accretion flow from a
polar circumbinary disc onto a high eccentricity ($e=0.78$) binary star system
with near unity mass ratio ($q=0.83$), as a model for binary HD 98800 BaBb. We
compare the polar circumbinary di... | astro-ph_EP |
Analytical determination of orbital elements using Fourier analysis. II.
Gaia astrometry and its combination with radial velocities: The ESA global astrometry space mission Gaia has been monitoring the position
of a billion stars since 2014. The analysis of such a massive dataset is
challenging in terms of the data p... | astro-ph_EP |
The Atmosphere: These notes contain everything necessary to run a flipped course on "The
Atmosphere" at an introductory undergraduate level. There are notes for the
students to read before each course meeting and problems for them to work on in
small groups during course meetings. Topics include (1) atmospheric
composi... | astro-ph_EP |
A Near-coplanar Stellar Flyby of the Planet Host Star HD 106906: We present an investigation into the kinematics of HD 106906 using the newly
released Gaia DR2 catalog to search for close encounters with other members of
the Scorpius-Centaurus (Sco-Cen) association. HD 106906 is an eccentric
spectroscopic binary that h... | astro-ph_EP |
Formation of Regular Satellites from Ancient Massive Rings in the Solar
System: When a planetary tidal disk -like Saturn's rings- spreads beyond the Roche
radius (inside which planetary tides prevent aggregation), satellites form and
migrate away. Here, we show that most regular satellites in the solar system
probabl... | astro-ph_EP |
Planetesimals Around Stars with TESS (PAST): I. Transient Dimming of a
Binary Solar Analog at the End of the Planet Accretion Era: We report detection of quasi-periodic (1.5 day) dimming of HD 240779, the
solar-mass primary in a 5" visual binary (also TIC 284730577), by the
Transiting Exoplanet Survey Satellite. This... | astro-ph_EP |
What are little worlds made of? Stellar abundances and the building
blocks of planets: If the photospheres of solar-type stars represent the composition of
circumstellar disks from which any planets formed, spectroscopic determinations
of stellar elemental abundances offer information on the composition of those
plan... | astro-ph_EP |
Condensation of Rocky Material in Astrophysical Environments: Volatility-dependent fractionation of the rock-forming elements at high
temperatures is an early, widespread process during formation of the earliest
solids in protoplanetary disks. Equilibrium condensation calculations allow
prediction of the identities and... | astro-ph_EP |
The effect of Poynting-Robertson drag on the triangular Lagrangian
points: We investigate the stability of motion close to the Lagrangian equilibrium
points L4 and L5 in the framework of the spatial, elliptic, restricted three-
body problem, subject to the radial component of Poynting-Robertson drag. For
this reason ... | astro-ph_EP |
Neptune's resonances in the Scattered Disk: The Scattered Disk Objects (SDOs) are thought to be a small fraction of the
ancient population of leftover planetesimals in the outer solar system that
were gravitationally scattered by the giant planets and have managed to survive
primarily by capture and sticking in Neptune... | astro-ph_EP |
Cooling Requirements for the Vertical Shear Instability in
Protoplanetary Disks: The vertical shear instability (VSI) offers a potential hydrodynamic
mechanism for angular momentum transport in protoplanetary disks (PPDs). The
VSI is driven by a weak vertical gradient in the disk's orbital motion, but
must overcome v... | astro-ph_EP |
Predicting Exoplanets Mass and Radius: A Nonparametric Approach: A fundamental endeavor in exoplanetary research is to characterize the bulk
compositions of planets via measurements of their masses and radii. With future
sample sizes of hundreds of planets to come from TESS and PLATO, we develop a
statistical method th... | astro-ph_EP |
Normal forms for the Laplace resonance: We describe a comprehensive model for systems locked in the Laplace
resonance. The framework is based on the simplest possible dynamical structure
provided by the Keplerian problem perturbed by the resonant coupling truncated
at second order in the eccentricities. The reduced Ham... | astro-ph_EP |
Spin Axes and Shape Models of Asteroid Pairs: Fingerprints of YORP and a
Path to the Density of Rubble Piles: An asteroid pair consists of two unbound objects with almost identical
heliocentric orbital elements that were formed when a single "rubble pile"
asteroid failed to remain bound against an increasing rotation... | astro-ph_EP |
Extreme Climate Variations from Milankovitch-like Eccentricity
Oscillations in Extrasolar Planetary Systems: Although our solar system features predominantly circular orbits, the
exoplanets discovered so far indicate that this is the exception rather than
the rule. This could have crucial consequences for exoplanet c... | astro-ph_EP |
Modeling Self-Subtraction in Angular Differential Imaging: Application
to the HD 32297 Debris Disk: We present a new technique for forward-modeling self-subtraction of spatially
extended emission in observations processed with angular differential imaging
(ADI) algorithms. High-contrast direct imaging of circumstella... | astro-ph_EP |
Using HCO$^+$ isotopologues as tracers of gas depletion in
protoplanetary disk gaps: The widespread rings and gaps seen in the dust continuum in protoplanetary
disks are sometimes accompanied by similar substructures seen in molecular line
emission. One example is the outer gap at 100 au in AS 209, which shows that
t... | astro-ph_EP |
A Methane Extension to the Classical Habitable Zone: The habitable zone (HZ) is the circumstellar region where standing bodies of
liquid water could exist on the surface of a rocky planet. Conventional
definitions assume that CO2 and H2O are the only greenhouse gases. The outer
edge of this classical N2-CO2-H2O HZ exte... | astro-ph_EP |
Observational evidence for a metal rich atmosphere on the super-Earth
GJ1214b: We report observations of two consecutive transits of the warm super-Earth
exoplanet GJ1214b at 3.6 and 4.5 microns with the Infrared Array Camera
instrument on-board the Spitzer Space Telescope. The two transit light curves
allow for the ... | astro-ph_EP |
The Effect of Composition on the Evolution of Giant and
Intermediate-Mass Planets: We model the evolution of planets with various masses and compositions. We
investigate the effects of the composition and its depth dependence on the
long-term evolution of the planets. The effects of opacity and stellar
irradiation ar... | astro-ph_EP |
Model atmospheres of irradiated exoplanets: The influence of stellar
parameters, metallicity, and the C/O ratio: Many parameters constraining the spectral appearance of exoplanets are still
poorly understood. We therefore study the properties of irradiated exoplanet
atmospheres over a wide parameter range including m... | astro-ph_EP |
Detection of Earth-mass and Super-Earth Trojan Planets Using Transit
Timing Variation Method: We have carried out an extensive study of the possibility of the detection of
Earth-mass and super-Earth Trojan planets using transit timing variation method
with the Kepler space telescope. We have considered a system consi... | astro-ph_EP |
New Nomenclature Rules for Meteor Showers Adopted: The Shower Database (SD) of the Meteor Data Center (MDC) had been operating
on the basis of stream-naming rules which were too complex and insufficiently
precise for 15 years. With a gradual increase in the number of discovered
meteor showers, the procedure for submitt... | astro-ph_EP |
The weird and the wonderful in our Solar System: Searching for
serendipity in the Legacy Survey of Space and Time: We present a novel method for anomaly detection in Solar System object data,
in preparation for the Legacy Survey of Space and Time. We train a deep
autoencoder for anomaly detection and use the learned ... | astro-ph_EP |
A Comprehensive Dust Model Applied to the Resolved Beta Pictoris Debris
Disk from Optical to Radio Wavelengths: We investigate whether varying the dust composition (described by the optical
constants) can solve a persistent problem in debris disk modeling--the
inability to fit the thermal emission without over-predic... | astro-ph_EP |
TEM analyses of in situ presolar grains from unequilibrated ordinary
chondrite LL3.0 Semarkona: We investigated six presolar grains from very primitive regions of the matrix
in the unequilibrated ordinary chondrite Semarkona with TEM. These grains
include one SiC, one oxide (Mg-Al spinel), and four silicates. Structu... | astro-ph_EP |
Synergies between Asteroseismology and Exoplanetary Science: Over the past decade asteroseismology has become a powerful method to
systematically characterize host stars and dynamical architectures of exoplanet
systems. In this contribution I review current key synergies between
asteroseismology and exoplanetary scienc... | astro-ph_EP |
Studying wave optics in the light curve of exoplanet microlensing: We study the wave optics features of gravitational microlensing by a binary
lens composed of a planet and a parent star. In this system, the source star
near the caustic line produces a pair of images in which they can play the role
of secondary sources... | astro-ph_EP |
Finding Long Lost Lexell's Comet: The Fate of the First Discovered
Near-Earth Object: Jupiter-family Comet D/1770 L1 (Lexell) was the first discovered Near-Earth
Object (NEO), and passed the Earth on 1770 Jul 1 at a recorded distance of
0.015 au. The comet was subsequently lost due to unfavorable observing
circumstan... | astro-ph_EP |
A Wideband Self-Consistent Disk-Averaged Spectrum of Jupiter Near 30 GHz
and Its Implications for NH$_{3}$ Saturation in the Upper Troposphere: We present a new set of measurements obtained with the Combined Array for
Research in Millimeter-wave Astronomy (CARMA) of Jupiter's microwave thermal
emission near the 1.3 c... | astro-ph_EP |
Astrometry of the main satellites of Uranus: 18 years of observations: We determine accurate positions of the main satellites of Uranus: Miranda,
Ariel, Umbriel, Titania, and Oberon. Positions of Uranus, as derived from those
of these satellites, are also determined. The observational period spans from
1992 to 2011. Al... | astro-ph_EP |
HADES RV program with HARPS-N at TNG. IX. A super-Earth around the M
dwarf Gl686: The HArps-n red Dwarf Exoplanet Survey is providing a major contribution to
the widening of the current statistics of low-mass planets, through the
in-depth analysis of precise radial velocity measurements in a narrow range of
spectral ... | astro-ph_EP |
Imaging polarimetry of Comet C/2012 L2 (LINEAR): We present the polarimetric results and analysis of comet C/2012 L2 (LINEAR)
observed at 31$^\circ$.1 phase angle before perihelion passage. The
observations of the comet were carried out using ARIES Imaging Polarimeter
(AIMPOL) mounted on the 1.04-m Sampurnanand telesco... | astro-ph_EP |
Bouncing on Titan: Motion of the Huygens Probe in the Seconds After
Landing: While landing on Titan, several instruments onboard Huygens acquired
measurements that indicate the probe did not immediately come to rest. Detailed
knowledge of the probe's motion can provide insight into the nature of Titan's
surface. Comb... | astro-ph_EP |
Detection of acoustic-gravity waves in lower ionosphere by VLF radio
waves: We present a new method to study harmonic waves in the low ionosphere (60 -
90 km) by detecting their effects on reflection of very low frequency (VLF)
radio waves. Our procedure is based on amplitude analysis of reflected VLF
radio waves rec... | astro-ph_EP |
Proton and antiproton modulation in the heliosphere for different solar
conditions and AMS-02 measurements prediction: Galactic Cosmic Rays (GCRs) are mainly protons confined in the galactic
magnetic field to form an isotropic flux inside the galaxy. Before reaching the
Earth orbit they enter the Heliosphere and unde... | astro-ph_EP |
Particle-Particle Particle-Tree: A Direct-Tree Hybrid Scheme for
Collisional N-Body Simulations: In this paper, we present a new hybrid algorithm for the time integration of
collisional N-body systems. In this algorithm, gravitational force between two
particles is divided into short-range and long-range terms, using... | astro-ph_EP |
Hydrodynamic outcomes of planet scattering in transitional discs: A significant fraction of unstable multiple planet systems likely scatter
during the transitional disc phase as gas damping becomes ineffectual. Using an
ensemble of FARGO hydrodynamic simulations and MERCURY n-body integrations, we
directly follow plane... | astro-ph_EP |
Apsidal asymmetric-alignment of Jupiter Trojans: The most distant Kuiper belt objects exhibit the clustering in their orbits,
and this anomalous architecture could be caused by Planet 9 with large
eccentricity and high inclination. We then suppose that the orbital clustering
of minor planets may be observed somewhere e... | astro-ph_EP |
K2-106, a system containing a metal-rich planet and a planet of lower
density: Planets in the mass range from 2 to 15 MEarth are very diverse. Some of them
have low densities, while others are very dense. By measuring the masses and
radii, the mean densities, structure, and composition of the planets are
constrained.... | astro-ph_EP |
Molecular abundances and C/O ratios in chemically evolving
planet-forming disk midplanes: (Abridged) Exoplanet atmospheres are thought be built up from accretion of
gas as well as pebbles and planetesimals in the midplanes of planet-forming
disks. The chemical composition of this material is usually assumed to be
unc... | astro-ph_EP |
Ephemeris Updates for Seven Selected HATNet Survey Transiting Exoplanets: We refined the ephemeris of seven transiting exoplanets HAT-P-6b, HAT-P-12b,
HAT-P-18b, HAT-P-22b, HAT-P-32b, HAT-P-33b, and HAT-P-52b. We observed 11
transits from eight observatories in different filters for HAT-P-6b and
HAT-P-32b. Also, the Ex... | astro-ph_EP |
Turbulence-Induced Relative Velocity of Dust particles IV: the Collision
Kernel: Motivated by its importance for modeling dust particle growth in
protoplanetary disks, we study turbulence-induced collision statistics of
inertial particles as a function of the particle friction time, tau_p. We show
that turbulent clus... | astro-ph_EP |
Formation of the warped debris disc around $β$ Pictoris: In light of the recent confirmation of an eccentric orbit giant planet,
$\beta$ Pic c, I revisit the formation and evolution of the warped debris disc
in the system. $\beta$ Pic c is interior to $\beta$ Pic b, and the debris disc
is exterior to both planets. Prev... | astro-ph_EP |
Corotation torques experienced by planets embedded in weakly magnetized
turbulent discs: The migration of low-mass planets is driven by the differential Lindblad
torque and the corotation torque in non-magnetic viscous models of
protoplanetary discs. The corotation torque has recently received detailed
attention as i... | astro-ph_EP |
Formation and dynamics of water clouds on temperate sub-Neptunes: The
example of K2-18b: Hubble (HST) spectroscopic transit observations of the temperate sub-Neptune
K2-18b were interpreted as the presence of water vapour with potential water
clouds. 1D modelling studies also predict the formation of water clouds at ... | 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 |
Molecules with ALMA at Planet-forming Scales (MAPS) V: CO gas
distributions: Here we present high resolution (15-24 au) observations of CO isotopologue
lines from the Molecules with ALMA on Planet-forming Scales (MAPS) ALMA Large
Program. Our analysis employs $^{13}$CO and C$^{18}$O ($J$=2-1), (1-0), and
C$^{17}$O (1... | astro-ph_EP |
The Formation of the Cold Classical Kuiper Belt by a Short Range
Transport Mechanism: The Classical Kuiper Belt is populated by a group of objects with low
inclination orbits, reddish colors and usually belonging to a binary system.
This so called Cold Classical Kuiper Belt is considered to have been formed in
situ f... | astro-ph_EP |
Star Hoppers: Planet Instability and Capture in Evolving Binary Systems: Many planets are observed in stellar binary systems, and their frequency may
be comparable to that of planetary systems around single stars. Binary stellar
evolution in such systems influences the dynamical evolution of the resident
planets. Here ... | astro-ph_EP |
The future lifespan of Earth's oxygenated Atmosphere: Earth's modern atmosphere is highly oxygenated and is a remotely detectable
signal of its surface biosphere. However, the lifespan of oxygen-based
biosignatures in Earth's atmosphere remains uncertain, particularly for the
distant future. Here we use a combined biog... | astro-ph_EP |
Effects of primitive photosynthesis on Earth's early climate system: The evolution of different forms of photosynthetic life has profoundly
altered the activity level of the biosphere, radically reshaping the
composition of Earth's oceans and atmosphere over time. However, the
mechanistic impacts of a primitive photosy... | astro-ph_EP |
Observability of molecular species in a nitrogen dominated atmosphere
for 55 Cancri e: One of the key goals of exoplanet science is the atmospheric characterisation
of super-Earths. Atmospheric abundances provide insight on the formation and
evolution of those planets and help to put our own rocky planets in context.... | astro-ph_EP |
Detectability of biosignatures in anoxic atmospheres with the James Webb
Space Telescope: A TRAPPIST-1e case study: The James Webb Space Telescope (JWST) may be capable of finding biogenic
gases in the atmospheres of habitable exoplanets around low mass stars.
Considerable attention has been given to the detectabilit... | astro-ph_EP |
Can Moons Have Moons?: Each of the giant planets within the Solar System has large moons but none of
these moons have their own moons (which we call ${\it submoons}$). By analogy
with studies of moons around short-period exoplanets, we investigate the
tidal-dynamical stability of submoons. We find that 10 km-scale subm... | astro-ph_EP |
On the observed clustering of major bodies in solar and extrasolar
subsystems: Major (exo)planetary and satellite bodies seem to concentrate at intermediate
areas of the radial distributions of all the objects present in each
(sub)system. We prove rigorously that the secular evolution of (exo)planets and
satellites n... | astro-ph_EP |
Bouncing on Titan: Motion of the Huygens Probe in the Seconds After
Landing: While landing on Titan, several instruments onboard Huygens acquired
measurements that indicate the probe did not immediately come to rest. Detailed
knowledge of the probe's motion can provide insight into the nature of Titan's
surface. Comb... | astro-ph_EP |
A statistical search for a population of Exo-Trojans in the Kepler
dataset: Trojans are small bodies in planetary Lagrangian points. In our solar system,
Jupiter has the largest number of such companions. Their existence is assumed
for exoplanetary systems as well, but none has been found so far. We present an
analys... | astro-ph_EP |
A Detailed Investigation of the Proposed NN Serpentis Planetary System: The post-main sequence eclipsing binary NN Serpentis was recently announced
as the potential host of at least two massive planetary companions. In that
work, the authors put forward two potential architectures that fit the
observations of the eclip... | astro-ph_EP |
Planets Around Low-Mass Stars (PALMS). IV. The Outer Architecture of M
Dwarf Planetary Systems: We present results from a high-contrast adaptive optics imaging search for
giant planets and brown dwarfs (>1 MJup) around 122 newly identified nearby
(<40 pc) young M dwarfs. Half of our targets are younger than 135 Myr a... | astro-ph_EP |
Determination of uncertainty profiles in neutral atmospheric properties
measured by radio occultation experiments: Radio occultations are commonly used to assess remotely the thermodynamic
properties of planets or satellites' atmospheres within the solar system. The
data processing usually involves the so-called Abel... | 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 |
The Atmospheres of Earth-like Planets after Giant Impact Events: It is now understood that the accretion of terrestrial planets naturally
involves giant collisions, the moon-forming impact being a well known example.
In the aftermath of such collisions the surface of the surviving planet is very
hot and potentially det... | astro-ph_EP |
Habitable Zones with Stable Orbits for Planets around Binary Systems: A general formulation to compute habitable zones (HZ) around binary stars is
presented. A HZ in this context must satisfy two separate conditions: a
radiative one and one of dynamical stability. For the case of single stars, the
usual concept of circ... | astro-ph_EP |
The Dynamics of Dust Grains in the Outer Solar System: We study the dynamics of large dust grains >1 micron with orbits outside of
the heliosphere (beyond 250 AU). Motion of the Solar System through the
interstellar medium (ISM) at a velocity of 26 km/s subjects these particles to
gas and Coulomb drag (grains are expec... | astro-ph_EP |
ALMA constraints on assembly of Core Accretion planets: Resolved dust continuum and CO line ALMA imaging, and in some cases detection
of H$\alpha$ emission, hint that young massive planets are abundant at wide
separations in protoplanetary discs. Here, we show how these observations can
probe the runaway phase of plane... | astro-ph_EP |
Evolution of the Dust Coma in Comet 67P/Churyumov-Gerasimenko Before
2009 Perihelion: Comet 67P/Churyumov-Gerasimenko is the main target of ESA's Rosetta mission
and will be encountered in May 2014. As the spacecraft shall be in orbit the
comet nucleus before and after release of the lander {\it Philae}, it is
necess... | astro-ph_EP |
The periodic and chaotic regimes of motion in the exoplanet 2/1
mean-motion resonance: We present the dynamical structure of the phase space of the planar planetary
2/1 mean-motion resonance (MMR). Inside the resonant domain, there exist two
families of periodic orbits, one associated to the librational motion of the... | astro-ph_EP |
The Rossiter-McLaughlin effect of CoRoT-3b & HD189733b: We present radial-velocity sequences acquired during three transits of the
exoplanet HD 189733b and one transit of the CoRoT-3b. We applied a combined
Markov-Chain Monte Carlo analysis of spectroscopic and photometric data on
these stars, to determine a full set o... | astro-ph_EP |
Planetary Orbital Equations in Externally-Perturbed Systems: Position
and Velocity-Dependent Forces: The increasing number and variety of extrasolar planets illustrates the
importance of characterizing planetary perturbations. Planetary orbits are
typically described by physically intuitive orbital elements. Here, we... | astro-ph_EP |
BEAST detection of a brown dwarf and a low-mass stellar companion around
the young bright B star HIP 81208: Recent observations from B-star Exoplanet Abundance Study (BEAST) have
illustrated the existence of sub-stellar companions around very massive stars.
In this paper, we present the detection of two lower mass co... | astro-ph_EP |
Discovery of the first Earth-sized planets orbiting a star other than
our Sun in the Kepler-20 system: Discovering other worlds the size of our own has been a long-held dream of
astronomers. The transiting planets Kepler-20e and Kepler-20f, which belong to
a multi-planet system, hold a very special place among the ma... | astro-ph_EP |
Incomplete cooling down of Saturn's A ring at solar equinox: Implication
for seasonal thermal inertia and internal structure of ring particles: At the solar equinox in August 2009, the Composite Infrared Spectrometer
(CIRS) onboard Cassini showed the lowest Saturn's ring temperatures ever
observed. Detailed radiative... | astro-ph_EP |
Extrasolar planets and brown dwarfs around A--F type stars. VIII. A
giant planet orbiting the young star HD113337: In the frame of the search for extrasolar planets and brown dwarfs around
early-type main-sequence stars, we present the detection of a giant planet
around the young F-type star HD113337. We estimated th... | astro-ph_EP |
Transit least-squares survey IV. Earth-like transiting planets expected
from the PLATO mission: In its long-duration observation phase, the PLATO satellite will observe two
non-overlapping fields for a total of 4 yr. The exact duration of each pointing
will be determined 2 yr before launch. Previous estimates of PLAT... | astro-ph_EP |
Hydrodynamics of Embedded Planets' First Atmospheres. II. A Rapid
Recycling of Atmospheric Gas: Following Paper I we investigate the properties of atmospheres that form
around small protoplanets embedded in a protoplanetary disc by conducting
hydrodynamical simulations. These are now extended to three dimensions,
emp... | astro-ph_EP |
The optical transmission spectrum of the hot Jupiter HAT-P-32b: clouds
explain the absence of broad spectral features?: We report Gemini-North GMOS observations of the inflated hot Jupiter
HAT-P-32b during two primary transits. We simultaneously observed two
comparison stars and used differential spectro-photometry t... | astro-ph_EP |
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