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The Origin of Chondrules: Constraints from Matrix-Chondrule
Complementarity: One of the major unresolved problems in cosmochemistry is the origin of
chondrules, once molten, spherical silicate droplets with diameters of 0.2 to 2
mm. Chondrules are an essential component of primitive meteorites and perhaps
of all earl... | 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 |
AKARI/IRC Near-Infrared Asteroid Spectroscopic Survey: AcuA-spec: Knowledge of water in the solar system is important for understanding of a
wide range of evolutionary processes and the thermal history of the solar
system. To explore the existence of water in the solar system, it is
indispensable to investigate hydrate... | astro-ph_EP |
Transit of Exomoon Plasma Tori: New Diagnosis: In the solar system, moons largely exceed planets in number. The Kepler
database has been shown to be sensitive to exomoon detection down to the mass
of Mars, but the first search has been unsuccessful. Here, we use a
particles-in-cell code to predict the transit of the pl... | astro-ph_EP |
Tidal spin down rates of homogeneous triaxial viscoelastic bodies: We use numerical simulations to measure the sensitivity of the tidal spin
down rate of a homogeneous triaxial ellipsoid to its axis ratios by comparing
the drift rate in orbital semi-major axis to that of a spherical body with the
same mass, volume and ... | astro-ph_EP |
The secondary eclipse of the transiting exoplanet CoRoT-2b: We present a study of the light curve of the transiting exoplanet CoRoT-2b,
aimed at detecting the secondary eclipse and measuring its depth. The data were
obtained with the CoRoT satellite during its first run of more than 140 days.
After filtering the low fr... | astro-ph_EP |
Extreme asteroids in the Pan-STARRS 1 Survey: Using the first 18 months of the Pan-STARRS 1 survey we have identified 33
candidate high-amplitude objects for follow-up observations and carried out
observations of 22 asteroids. 4 of the observed objects were found to have
observed amplitude $A_{obs}\geq 1.0$ mag. We fin... | astro-ph_EP |
The late accretion and erosion of Vesta's crust recorded by eucrites and
diogenites as an astrochemical window into the formation of Jupiter and the
early evolution of the Solar System: For decades the limited thickness of Vesta's basaltic crust, revealed by the
link between the asteroid and the howardite-eucrite-d... | astro-ph_EP |
Turbulence in the TW Hya Disk: Turbulence is a fundamental parameter in models of grain growth during the
early stages of planet formation. As such, observational constraints on its
magnitude are crucial. Here we self-consistently analyze ALMA CO(2-1), SMA
CO(3-2), and SMA CO(6-5) observations of the disk around TW Hya... | astro-ph_EP |
A Substellar Companion in a 1.3 yr Nearly-circular Orbit of HD 16760: We report the detection of a substellar companion orbiting the G5 dwarf HD
16760 from the N2K sample. Precise Doppler measurements of the star from Subaru
and Keck revealed a Keplerian velocity variation with a period of 466.47+-0.35
d, a semiamplitu... | astro-ph_EP |
Performance of near-infrared high-contrast imaging methods with JWST
from commissioning: The James Webb Space Telescope (JWST) will revolutionize the field of
high-contrast imaging and enable both the direct detection of Saturn-mass
planets and the characterization of substellar companions in the mid-infrared.
While ... | astro-ph_EP |
The secondary eclipse of CoRoT-1b: The transiting planet CoRoT-1b is thought to belong to the pM-class of
planets, in which the thermal emission dominates in the optical wavelengths. We
present a detection of its secondary eclipse in the CoRoT white channel data,
whose response function goes from ~400 to ~1000 nm. We u... | astro-ph_EP |
A Lyman-alpha transit left undetected: the environment and atmospheric
behavior of K2-25b: K2-25b is a Neptune-sized exoplanet (3.45 Earth radii) that orbits its M4.5
host with a period of 3.48 days. Due to its membership in the Hyades Cluster,
the system has a known age (727 +/- 75 Myr). K2-25b's youth and its
simil... | astro-ph_EP |
Vital Signs: Seismology of ocean worlds: Ice-covered ocean worlds possess diverse energy sources and associated
mechanisms that are capable of driving significant seismic activity, but to
date no measurements of their seismic activity have been obtained. Such
investigations could probe their transport properties and ra... | astro-ph_EP |
Seismometer Detection of Dust Devil Vortices by Ground Tilt: We report seismic signals on a desert playa caused by convective vortices and
dust devils. The long-period (10-100s) signatures, with tilts of ~10$^{-7}$
radians, are correlated with the presence of vortices, detected with nearby
sensors as sharp temporary pr... | astro-ph_EP |
Asteroid 4 Vesta: dynamical and collisional evolution during the Late
Heavy Bombardment: Vesta is the only currently identified asteroid for which we possess samples,
which revealed us that the asteroid is differentiated and possesses a
relatively thin basaltic crust that survived to the evolution of the asteroid
bel... | astro-ph_EP |
Resonance locking in giant planets indicated by the rapid orbital
expansion of Titan: Tidal effects in planetary systems are the main driver in the orbital
migration of natural satellites. They result from physical processes occurring
deep inside celestial bodies, whose effects are rarely observable from surface
imag... | astro-ph_EP |
Four Small Planets Buried in K2 Systems: What Can We Learn for TESS?: The Kepler, K2, and Transiting Exoplanet Survey Satellite (TESS) missions
have provided a wealth of confirmed exoplanets, benefiting from a huge effort
from the planet-hunting and follow-up community. With careful systematics
mitigation, these missio... | astro-ph_EP |
NGTS-13b: A hot 4.8 Jupiter-mass planet transiting a subgiant star: We report the discovery of the massive hot Jupiter NGTS-13b by the Next
Generation Transit Survey (NGTS). The V = 12.7 host star is likely in the
subgiant evolutionary phase with log g$_{*}$ = 4.04 $\pm$ 0.05, T$_{eff}$ =
5819 $\pm$ 73 K, M$_{*}$ = 1.3... | astro-ph_EP |
The Complex History of Trojan Asteroids: The Trojan asteroids provide a unique perspective on the history of Solar
System. As a large population of small bodies, they record important
gravitational interactions and dynamical evolution of the Solar System. In the
past decade, significant advances have been made in under... | astro-ph_EP |
Radiation hydrodynamical models of the inner rim in protoplanetary disks: Many stars host planets orbiting within a few astronomical units (AU). The
occurrence rate and distributions of masses and orbits vary greatly with the
host stars mass. These close planets origins are a mystery that motivates
investigating protop... | astro-ph_EP |
The GAPS Programme at TNG XXXVIII. Five molecules in the atmosphere of
the warm giant planet WASP-69b detected at high spectral resolution: The field of exo-atmospheric characterisation is progressing at an
extraordinary pace. Atmospheric observations are now available for tens of
exoplanets, mainly hot and warm infl... | astro-ph_EP |
Preparing an unsupervised massive analysis of SPHERE high contrast data
with the PACO algorithm: We aim at searching for exoplanets on the whole ESO/VLT-SPHERE archive with
improved and unsupervised data analysis algorithm that could allow to detect
massive giant planets at 5 au. To prepare, test and optimize our app... | astro-ph_EP |
Super-Eccentric Migrating Jupiters: An important class of formation theories for hot Jupiters involves the
excitation of extreme orbital eccentricity (e=0.99 or even larger) followed by
tidal dissipation at periastron passage that eventually circularizes the
planetary orbit at a period less than 10 days. In a steady st... | astro-ph_EP |
Stellar wind effects on the atmospheres of close-in giants: a possible
reduction in escape instead of increased erosion: The atmospheres of highly irradiated exoplanets are observed to undergo
hydrodynamic escape. However, due to strong pressures, stellar winds can
confine planetary atmospheres, reducing their escape... | astro-ph_EP |
Meta-modelling the climate of dry tide locked rocky planets: Rocky planets hosted by close-in extrasolar systems are likely to be tidally
locked in 1:1 spin-orbit resonance, a configuration where they exhibit
permanent dayside and nightside. Because of the resulting day-night temperature
gradient, the climate and large... | astro-ph_EP |
Polarized microwave emission from space particles in the upper
atmosphere of the Earth: Tons of space particles enter the Earth atmosphere every year, being detected
when they produce fireballs, meteor showers, or when they impact the Earth
surface. Particle detection in the showers could also be attempted from space... | astro-ph_EP |
Complete Tidal Evolution of Pluto-Charon: Both Pluto and its satellite Charon have rotation rates synchronous with
their orbital mean motion. This is the theoretical end point of tidal evolution
where transfer of angular momentum has ceased. Here we follow Pluto's tidal
evolution from an initial state having the curren... | astro-ph_EP |
Statistical-likelihood Exo-Planetary Habitability Index (SEPHI): A new Statistical-likelihood Exo-Planetary Habitability Index (SEPHI) is
presented. It has been developed to cover the current and future features
required for a classification scheme disentangling whether any discovered
exoplanet is potentially habitable... | astro-ph_EP |
XX. CoRoT-20b: A very high density, high eccentricity transiting giant
planet: We report the discovery by the CoRoT space mission of a new giant planet,
CoRoT-20b. The planet has a mass of 4.24 +/- 0.23 MJ and a radius of 0.84 +/-
0.04 RJ. With a mean density of 8.87 +/- 1.10 g/cm^3, it is among the most
compact plan... | astro-ph_EP |
Impact Erosion Model for Gravity-Dominated Planetesimals: Disruptive collisions have been regarded as an important process for planet
formation, while non-disruptive, small-scale collisions (hereafter called
erosive collisions) have been underestimated or neglected by many studies.
However, recent studies have suggeste... | astro-ph_EP |
Listening to the gravitational wave sound of circumbinary exoplanets: To date more than 3500 exoplanets have been discovered orbiting a large
variety of stars. Due to the sensitivity limits of the currently used detection
techniques, these planets populate zones restricted either to the solar
neighbourhood or towards t... | astro-ph_EP |
Modeling Indications of Technology in Planetary Transit Light Curves --
Dark-side illumination: We analyze potential effects of an extraterrestrial civilization's use of
orbiting mirrors to illuminate the dark side of a synchronously rotating planet
on planetary transit light curves. Previous efforts to detect civili... | astro-ph_EP |
Constraining High Speed Winds in Exoplanet Atmospheres Through
Observations of Anomalous Doppler Shifts During Transit: Three-dimensional (3-D) dynamical models of hot Jupiter atmospheres predict
very strong wind speeds. For tidally locked hot Jupiters, winds at high
altitude in the planet's atmosphere advect heat fr... | 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 |
Where does Titan Sand Come From: Insight from Mechanical Properties of
Titan Sand Candidates: Extensive equatorial linear dunes exist on Titan, but the origin of the sand,
which appears to be organic, is unknown. We used nanoindentation to study the
mechanical properties of a few Titan sand candidates, several natura... | astro-ph_EP |
Computing Apparent Planetary Magnitudes for The Astronomical Almanac: Improved equations for computing planetary magnitudes are reported. These
formulas model V-band observations acquired from the time of the earliest
filter photometry in the 1950s up to the present era. The new equations
incorporate several terms that... | astro-ph_EP |
Q-type asteroids: Possibility of non-fresh weathered surfaces: Itokawa particles, which are the recovered samples from the S-complex
asteroid 25143 Itokawa by the Hayabusa spacecraft, demonstrate that S-complex
asteroids are parent bodies of ordinary chondrite meteorites. Furthermore, they
clarify that the space weathe... | astro-ph_EP |
An N-body Integrator for Gravitating Planetary Rings, and the Outer Edge
of Saturn's B Ring: A new symplectic N-body integrator is introduced, one designed to calculate
the global 360 degree evolution of a self-gravitating planetary ring that is in
orbit about an oblate planet. This freely-available code is called ep... | astro-ph_EP |
Gap carving by a migrating planet embedded in a massive debris disc: When considering gaps in debris discs, a typical approach is to invoke
clearing by an unseen planet within the gap, and derive the planet mass using
Wisdom overlap or Hill radius arguments. However, this approach can be invalid
if the disc is massive,... | astro-ph_EP |
Investigating the Temperature Distribution of Diatomic Carbon in Comets
using the Swan Bands: We present high spectral-resolution observations of comets 122P/de Vico and
153P/Ikeya-Zhang obtained with the Tull Coud\'{e} spectrograph on the 2.7m
Harlan J. Smith telescope of McDonald Observatory. We used these data to ... | astro-ph_EP |
Capture of interstellar objects II: by the Solar system: Capture of interstellar objects (ISOs) into the Solar system is dominated by
ISOs with asymptotic incoming speeds $v_\infty<4\,$km\,s$^{-1}$. The capture
rate is proportional to the ISO phase-space density in the Solar vicinity and
does not vary along the Sun's G... | astro-ph_EP |
Behaviour of electron content in the ionospheric D-region during solar
X-ray flares: One of the most important parameters in ionospheric plasma research also
having a wide practical application in wireless satellite telecommunications is
the total electron content (TEC) representing the columnal electron number
densi... | astro-ph_EP |
Layer formation in a stably-stratified fluid cooled from above. Towards
an analog for Jupiter and other gas giants: In 1D evolution models of gas giant planets, an outer convection zone
advances into the interior as the surface cools, and multiple convective layers
form beneath that convective front. To study layer f... | astro-ph_EP |
The Runaway Greenhouse Effect on Hycean Worlds: Hycean worlds are a proposed subset of sub-Neptune exoplanets with
substantial water inventories, liquid surface oceans and extended
hydrogen-dominated atmospheres that could be favourable for habitability. In
this work, we aim to quantitatively define the inner edge of t... | astro-ph_EP |
Effects of an eccentric inner Jupiter on the dynamical evolution of icy
body reservoirs in a planetary scattering scenario: We analyze the process of planetary scattering around M0-type stars. To do
this, we carry out N-body simulations with three Jupiter-mass planets close to
their instability limit together with an... | astro-ph_EP |
The abundance and thermal history of water ice in the disk surrounding
HD142527 from the DIGIT Herschel Key Program: The presence or absence of ice in protoplanetary disks is of great importance
for the formation of planets. By enhancing the solid surface density and
increasing the sticking efficiency, ice catalyzes ... | astro-ph_EP |
Migrating super-Earths in low-viscosity discs: unveiling the roles of
feedback, vortices, and laminar accretion flows: We present the highest resolution study to date of super-Earths migrating in
inviscid and low-viscosity discs, motivated by the connection to laminar,
wind-driven models of protoplanetary discs. Our ... | astro-ph_EP |
A photochemical model for the carbon-rich planet WASP-12b: The hot Jupiter WASP-12b is a heavily irradiated exoplanet in a short period
orbit around a G0-star with twice the metallicity of the Sun. A recent
thermochemical equilibrium analysis based on Spitzer and ground-based infrared
observations suggests that the pre... | astro-ph_EP |
Volatile transport on inhomogeneous surfaces: II. Numerical calculations
(VT3D): Several distant icy worlds have atmospheres that are in vapor-pressure
equilibrium with their surface volatiles, including Pluto, Triton, and,
probably, several large KBOs near perihelion. Studies of the volatile and
thermal evolution of... | astro-ph_EP |
Transmission Spectroscopy of the Hot-Jupiter WASP-12b from 0.7 to 5
microns: Since the first report of a potentially non-solar carbon-to-oxygen ratio
(C/O) in its dayside atmosphere, the highly irradiated exoplanet WASP-12b has
been under intense scrutiny and the subject of many follow-up observations.
Additionally, ... | astro-ph_EP |
A Framework for Prioritizing the TESS Planetary Candidates Most Amenable
to Atmospheric Characterization: A key legacy of the recently launched TESS mission will be to provide the
astronomical community with many of the best transiting exoplanet targets for
atmospheric characterization. However, time is of the essenc... | astro-ph_EP |
Combining astrometry and JUICE -- Europa Clipper radio science to
improve the ephemerides of the Galilean moons: The upcoming JUICE and Europa Clipper missions to Jupiter's Galilean
satellites will provide radio science tracking measurements of both spacecraft.
Such data are expected to significantly help estimating ... | astro-ph_EP |
Formation of dust-rich planetesimals from sublimated pebbles inside of
the snow line: Content: For up to a few millions of years, pebbles must provide a
quasi-steady inflow of solids from the outer parts of protoplanetary disks to
their inner regions. Aims: We wish to understand how a significant fraction of
the pebb... | astro-ph_EP |
Large eccentricity, low mutual inclination: the three-dimensional
architecture of a hierarchical system of giant planets: We establish the three-dimensional architecture of the Kepler-419 (previously
KOI-1474) system to be eccentric yet with a low mutual inclination. Kepler-419b
is a warm Jupiter at semi-major axis a... | astro-ph_EP |
Asteroid Photometry: Asteroid photometry has three major applications: providing clues about
asteroid surface physical properties and compositions, facilitating photometric
corrections, and helping design and plan ground-based and spacecraft
observations. The most significant advances in asteroid photometry in the past... | astro-ph_EP |
Electrostatic lofting of dust grains from the surfaces of Thebe and
Amalthea: Energetic electrons from the inner radiation belt provide significant
electric charging of the surfaces of Jupiter's moons Thebe and Amalthea whose
orbits are located within this radiation belt. We estimate theoretically the
electric fields... | astro-ph_EP |
Constraining the origin of the planetary debris surrounding ZTF
J0139+5245 through rotational fission of a triaxial asteroid: White dwarfs containing orbiting planetesimals or their debris represent
crucial benchmarks by which theoretical investigations of post-main-sequence
planetary systems may be calibrated. The p... | astro-ph_EP |
HAT-P-28b and HAT-P-29b: Two Sub-Jupiter Mass Transiting Planets: We present the discovery of two transiting exoplanets. HAT-P-28b orbits a
V=13.03 G3 dwarf star with a period P = 3.2572 d and has a mass of 0.63 +- 0.04
MJ and a radius of 1.21 + 0.11 -0.08 RJ yielding a mean density of 0.44 +- 0.09
g cm-3. HAT-P-29b or... | astro-ph_EP |
Constraining spatial pattern of early activity of comet 67P/C-G with 3D
modeling of the MIRO observations: Our aim is to investigate early activity (July 2014) of 67P/CG with 3D coma
and radiative transfer modeling of MIRO measurements, accounting for nucleus
shape, illumination, and orientation of the comet. We inve... | astro-ph_EP |
Detection of an atmosphere around the super-Earth 55 Cancri e: We report the analysis of two new spectroscopic observations of the
super-Earth 55 Cancri e, in the near infrared, obtained with the WFC3 camera
onboard the HST. 55 Cancri e orbits so close to its parent star, that
temperatures much higher than 2000 K are e... | astro-ph_EP |
Hypotheses for near-surface exchange of methane on Mars: The Curiosity rover recently detected a background of 0.7 ppb and spikes of 7
ppb of methane on Mars. This in situ measurement reorients our understanding of
the Martian environment and its potential for life, as the current theories do
not entail any geological ... | astro-ph_EP |
Insights into planet formation from debris disks: II. Giant impacts in
extrasolar planetary systems: Giant impacts refer to collisions between two objects each of which is
massive enough to be considered at least a planetary embryo. The putative
collision suffered by the proto-Earth that created the Moon is a prime e... | astro-ph_EP |
Outburst activity in comets: II. A multi-band photometric monitoring of
comet 29p/Schwassmann-Wachmann 1: We have carried out a continuous multi-band photometric monitoring of the
nuclear activity of comet 29P/Schwassmann-Wachmann 1 from 2008 to 2010. Our
main aim has been to study the outburst mechanism on the basis... | astro-ph_EP |
The Radial Distribution of Dust Particles in the HL Tau Disk from ALMA
and VLA Observations: Understanding planet formation requires to discern how dust grows in
protoplanetary disks. An important parameter to measure in disks is the maximum
dust grain size present. This is usually estimated through measurements of t... | astro-ph_EP |
Instantaneous Three-dimensional Thermal Structure of the South Polar
Vortex of Venus: The Venus thermal radiation spectrum exhibits the signature of $CO_2$
absorption bands. By means of inversion techniques, those bands enable the
retrieval of atmospheric temperature profiles. We have analyzed VIRTIS-M-IR
night-side ... | astro-ph_EP |
Gravito-turbulence in irradiated protoplanetary discs: Using radiation hydrodynamics simulations in a local stratified shearing box
with realistic equations of state and opacities, we explored the outcome of
self-gravity at 50 AU in a protoplanetary disc irradiated by the central star.
We found that gravito-turbulence ... | astro-ph_EP |
The Architecture of the V892 Tau System: the Binary and its Circumbinary
Disk: We present high resolution millimeter continuum and CO line observations for
the circumbinary disk around V892 Tau to constrain the stellar and disk
properties. The total mass of the two near-equal-mass A stars is estimated to
be $6.0\pm0.... | astro-ph_EP |
XO-2b: a Prograde Planet with a Negligible Eccentricity, and an
Additional Radial Velocity Variation: We present precise radial velocities of XO-2 taken with the Subaru HDS,
covering two transits of XO-2b with an interval of nearly two years. The data
suggest that the orbital eccentricity of XO-2b is consistent with ... | astro-ph_EP |
Particle transport in evolving protoplanetary disks: Implications for
results from Stardust: Samples returned from comet 81P/Wild 2 by Stardust confirm that substantial
quantities of crystalline silicates were incorporated into the comet at
formation. We investigate the constraints that this observation places upon
p... | astro-ph_EP |
Ground-based detections of thermal emission from CoRoT-1b and WASP-12b: We report a new detection of the H-band thermal emission of CoRoT-1b and two
confirmation detections of the Ks-band thermal emission of WASP-12b at
secondary eclipses. The H-band measurement of CoRoT-1b shows an eclipse depth
of 0.145%\pm0.049% wit... | astro-ph_EP |
Shedding Light on the Eccentricity Valley: Gap Heating and Eccentricity
Excitation of Giant Planets in Protoplanetary Disks: We show that the first order (non co-orbital) corotation torques are
significantly modified by entropy gradients in a non-barotropic protoplanetary
disk. Such non-barotropic torques can dramati... | astro-ph_EP |
Origin Scenarios for the Kepler 36 Planetary System: We explore scenarios for the origin of two different density planets in the
Kepler 36 system in adjacent orbits near the 7:6 mean motion resonance. We find
that fine tuning is required in the stochastic forcing amplitude, the migration
rate and planet eccentricities ... | astro-ph_EP |
Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter
Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar
Companions: Multi-star systems are common, yet little is known about a stellar
companion's influence on the formation and evolution of planetary systems. For
instance, stellar compa... | astro-ph_EP |
Identification of a new spectral signature at 3 $μ$m over Martian
northern high latitudes: implications for surface composition: Mars northern polar latitudes are known to harbor an enhanced 3 ${\mu}$m
spectral signature when observed from orbit. This may indicate a greater amount
of surface adsorbed or bound water, ... | astro-ph_EP |
Direct Imaging of Extra-solar Planets - Homogeneous Comparison of
Detected Planets and Candidates: Searching the literature, we found 25 stars with directly imaged planets and
candidates. We gathered photometric and spectral information for all these
objects to derive their luminosities in a homogeneous way, taking a... | astro-ph_EP |
On the co-orbital asteroids in the solar system: medium-term timescale
analysis of the quasi-coplanar objects: The focus of this work is the current distribution of asteroids in co-orbital
motion with Venus, Earth and Jupiter, under a quasi-coplanar configuration and
for a medium-term timescale of the order of 900 ye... | astro-ph_EP |
Giant Impact onto a Vesta-Like Asteroid and Formation of Mesosiderites
through Mixing of Metallic Core and Surface Crust: Mesosiderites are a type of stony-iron meteorites composed of a mixture of
silicates and Fe-Ni metals. The mesosiderite silicates and metals are
considered to have originated from the crust and me... | astro-ph_EP |
The giant nature of WD 1856 b implies that transiting rocky planets are
rare around white dwarfs: White dwarfs (WDs) have roughly Earth-sized radii - a fact long recognized to
facilitate the potential discovery of sub-Earth sized planets via transits, as
well atmospheric characterization including biosignatures. Desp... | astro-ph_EP |
Cometary glycolaldehyde as a source of pre-RNA molecules: Over 200 molecules have been detected in multiple extraterrestrial
environments, including glycolaldehyde (C2(H2O)2, GLA), a two-carbon sugar
precursor that has been detected in regions of the interstellar medium. Its
recent in situ detection on the nucleus of c... | astro-ph_EP |
Asteroseismology of iota Draconis and Discovery of an Additional
Long-Period Companion: Giant stars as known exoplanet hosts are relatively rare due to the potential
challenges in acquiring precision radial velocities and the small predicted
transit depths. However, these giant host stars are also some of the brighte... | astro-ph_EP |
Dynamic Limits on Planar Libration-Orbit Coupling Around an Oblate
Primary: This paper explores the dynamic properties of the planar system of an
ellipsoidal satellite in an equatorial orbit about an oblate primary. In
particular, we investigate the conditions for which the satellite is bound in
librational motion or... | astro-ph_EP |
Accessible Carbon on the Moon: Carbon is one of the most essential elements to support a sustained human
presence in space, and more immediately, several large-scale methalox-based
transport systems will begin operating in the near future. This raises the
question of whether indigenous carbon on the Moon is abundant an... | astro-ph_EP |
The Absence of Cold Dust around Warm Debris Disk Star HD 15407A: We report Herschel and AKARI photometric observations at far-infrared (FIR)
wavelengths of the debris disk around the F3V star HD 15407A, in which the
presence of an extremely large amount of warm dust (~500-600 K) has been
suggested by mid-infrared (MIR)... | astro-ph_EP |
Information Content Analysis for Selection of Optimal JWST Observing
Modes for Transiting Exoplanet Atmospheres: The James Webb Space Telescope (JWST) is nearing its launch date of 2018, and
will undoubtedly revolutionize our knowledge of exoplanet atmospheres. While
several studies have explored what the limits of t... | astro-ph_EP |
Collisional Grooming Models of the Kuiper Belt Dust Cloud: We modeled the 3-D structure of the Kuiper Belt dust cloud at four different
dust production rates, incorporating both planet-dust interactions and
grain-grain collisions using the collisional grooming algorithm. Simulated
images of a model with a face-on optic... | astro-ph_EP |
The EChO science case: The discovery of almost 2000 exoplanets has revealed an unexpectedly diverse
planet population. Observations to date have shown that our Solar System is
certainly not representative of the general population of planets in our Milky
Way. The key science questions that urgently need addressing are ... | astro-ph_EP |
The Rate of Planet-star Coalescences Due to Tides and Stellar Evolution: Orbits of close-in planets can shrink significantly due to dissipation of
tidal energy in a host star. This process can result in star-planet coalescence
within the Galactic lifetime. In some cases, such events can be accompanied by
an optical or/... | astro-ph_EP |
Global Calculations of Density Waves and Gap Formation in Protoplanetary
Disks using a Moving Mesh: We calculate the global quasi-steady state of a thin disk perturbed by a
low-mass protoplanet orbiting at a fixed radius using extremely high-resolution
numerical integrations of Euler's equations in two dimensions. Th... | astro-ph_EP |
Millimetre spectral indices of transition disks and their relation to
the cavity radius: Transition disks are protoplanetary disks with inner depleted dust cavities
and excellent candidates to investigate the dust evolution under the existence
of a pressure bump. A pressure bump at the outer edge of the cavity allows... | astro-ph_EP |
Debiasing the Minimum-Mass Extrasolar Nebula: On the Diversity of Solid
Disk Profiles: A foundational idea in the theory of in situ planet formation is the "minimum
mass extrasolar nebula" (MMEN), a surface density profile ($\Sigma$) of disk
solids that is necessary to form the planets in their present locations. Whi... | astro-ph_EP |
The Far-Ultraviolet "Continuum" in Protoplanetary Disk Systems I:
Electron-Impact H2 and Accretion Shocks: We present deep spectroscopic observations of the classical T Tauri stars DF
Tau and V4046 Sgr in order to better characterize two important sources of
far-ultraviolet continuum emission in protoplanetary disks.... | astro-ph_EP |
Water delivery to the TRAPPIST-1 planets: Three of the seven rocky planets (e, f, and g) in TRAPPIST-1 system orbit in
the habitable zone of the host star. Therefore, water can be in liquid state at
their surface being essential for life. Recent studies suggest that these
planets formed beyond the snow line in a water-... | astro-ph_EP |
Nebular history of an ultrarefractory phase bearing CAI from a reduced
type CV chondrite: Ultrarefractory (UR) phases in CAIs could have formed at higher T compared to
common CAI minerals and thus they potentially provide constraints on very
high-T processes in the solar nebula. We report a detailed characterization ... | astro-ph_EP |
LHS6343C: A Transiting Field Brown Dwarf Discovered by the Kepler
Mission: We report the discovery of a brown dwarf that transits one member of the M+M
binary system LHS6343AB every 12.71 days. The transits were discovered using
photometric data from the Kelper public data release. The LHS6343 stellar
system was prev... | astro-ph_EP |
Radiative transfer models of mid-infrared H2O lines in the
Planet-forming Region of Circumstellar Disks: The study of warm molecular gas in the inner regions of protoplanetary disks
is of key importance for the study of planet formation and especially for the
transport of H2O and organic molecules to the surfaces of ... | astro-ph_EP |
Improvements on analytic modelling of stellar spots: In this work we present the solution of the stellar spot problem using the
Kelvin-Stokes theorem. Our result is applicable for any given location and
dimension of the spots on the stellar surface. We present explicitely the
result up to the second degree in the limb ... | astro-ph_EP |
Reconstructing the photometric light curves of Earth as a planet along
its history: By utilizing satellite-based estimations of the distribution of clouds, we
have studied the Earth's large-scale cloudiness behavior according to latitude
and surface types (ice, water, vegetation and desert). These empirical
relations... | astro-ph_EP |
Following the TraCS of exoplanets with Pan-Planets: Wendelstein-1b and
Wendelstein-2b: Hot Jupiters seem to get rarer with decreasing stellar mass. The goal of the
Pan-Planets transit survey was the detection of such planets and a statistical
characterization of their frequency. Here, we announce the discovery and
va... | astro-ph_EP |
How initial and boundary conditions affect protoplanetary migration in a
turbulent sub-Keplerian accretion disc: 2D non viscous SPH simulations: Current theories on planetary formation establish that giant planet formation
should be contextual to their quick migration towards the central star due to
the protoplanets-... | astro-ph_EP |
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