text stringlengths 89 2.49k | category stringclasses 19
values |
|---|---|
An ATCA survey of debris disks at 7 millimeters: We present ATCA continuum observations at a wavelength of 6.8 mm of five
debris disks: $\beta$ Pictoris, q$^1$ Eridani, HD 107146, HD 181327, and HD
95086. These observations provide the detection at the longest wavelengths
obtained to date for all these debris disks. By... | astro-ph_EP |
Refined stellar, orbital and planetary parameters of the eccentric
HAT-P-2 planetary system: We present refined parameters for the extrasolar planetary system HAT-P-2
(also known as HD 147506), based on new radial velocity and photometric data.
HAT-P-2b is a transiting extrasolar planet that exhibits an eccentric orb... | astro-ph_EP |
Searching for the HR 8799 Debris Disk with HST/STIS: We present a new algorithm for space telescope high contrast imaging of
close-to-face-on planetary disks called Optimized Spatially Filtered (OSFi)
normalization. This algorithm is used on HR 8799 Hubble Space Telescope (HST)
coronagraphic archival data, showing an o... | astro-ph_EP |
High precision Symplectic Integrators for the Solar System: Using a Newtonian model of the Solar System with all 8 planets, we perform
extensive tests on various symplectic integrators of high orders, searching for
the best splitting scheme for long term studies in the Solar System. These
comparisons are made in Jacobi... | astro-ph_EP |
Collision detection for N-body Kepler systems: In a Keplerian system, a large number of bodies orbit a central mass.
Accretion disks, protoplanetary disks, asteroid belts, and planetary rings are
examples. Simulations of these systems require algorithms that are
computationally efficient. The inclusion of collisions in... | astro-ph_EP |
Revisiting the Full Sets of Orbital Parameters for the XO-3 System: No
evidence for Temporal Variation of the Spin-Orbit Angle: We present 12 new transit light curves and 16 new out-of-transit radial
velocity measurements for the XO-3 system. By modelling our newly collected
measurements together with archival photom... | astro-ph_EP |
Multiband Optical Observation of P/2010 A2 Dust Tail: An inner main-belt asteroid, P/2010 A2, was discovered on January 6th, 2010.
Based on its orbital elements, it is considered that the asteroid belongs to
the Flora collisional family, where S-type asteroids are common, whilst showing
a comet-like dust tail. Although... | astro-ph_EP |
Coupling thermal evolution of planets and hydrodynamic atmospheric
escape in MESA: The long-term evolution of hydrogen-dominated atmospheres of sub-Neptune-like
planets is mostly controlled by two factors: a slow dissipation of the
gravitational energy acquired at the formation (known as thermal evolution) and
atmosp... | astro-ph_EP |
A Giant Planet Around a Metal-poor Star of Extragalactic Origin: Stars in their late stage of evolution, such as Horizontal Branch stars, are
still largely unexplored for planets. We report the detection of a planetary
companion around HIP 13044, a very metal-poor star on the red Horizontal
Branch, based on radial velo... | astro-ph_EP |
Aqueous alteration on main belt primitive asteroids: results from
visible spectroscopy: This work focuses on the study of the aqueous alteration process which acted
in the main belt and produced hydrated minerals on the altered asteroids. The
aqueous alteration is particularly important for unraveling the processes
o... | astro-ph_EP |
Molecular Outgassing in Centaur 29P/Schwassmann-Wachmann 1 During Its
Exceptional 2021 Outburst: Coordinated Multi-Wavelength Observations Using
nFLASH at APEX and iSHELL at the NASA-IRTF: The extraordinary 2021 September-October outburst of Centaur
29P/Schwassmann-Wachmann 1 afforded an opportunity to test the com... | astro-ph_EP |
Cooling-Induced Vortex Decay in Keplerian Disks: Vortices are readily produced by hydrodynamical instabilities, such as the
Rossby wave instability, in protoplanetary disks. However, large-scale
asymmetries indicative of dust-trapping vortices are uncommon in sub-millimeter
continuum observations. One possible explanat... | astro-ph_EP |
An analytic solution to measure the gas size in protoplanetary discs in
the viscous self-similar scenario: In order to understand which mechanism is responsible for accretion in
protoplanetary discs, a robust knowledge of the observed disc radius using gas
tracers such as $^{12}$CO and other CO isotopologues is pivot... | astro-ph_EP |
Physical Characterization of Metal-rich Near-Earth Asteroids 6178 (1986
DA) and 2016 ED85: Metal-rich near-Earth asteroids (NEAs) represent a small fraction of the NEA
population that is mostly dominated by S- and C-type asteroids. Because of
this, their identification and study provide us with a unique opportunity t... | astro-ph_EP |
A dearth of small particles in the transiting material around the white
dwarf WD 1145+017: White dwarf WD 1145+017 is orbited by several clouds of dust, possibly
emanating from actively disintegrating bodies. These dust clouds reveal
themselves through deep, broad, and evolving transits in the star's light
curve. Her... | astro-ph_EP |
Ks band secondary eclipses of WASP-19b and WASP-43b with the
Anglo-Australian Telescope: We report new Ks band secondary eclipse observations for the hot-Jupiters
WASP-19b and WASP-43b. Using the IRIS2 infrared camera on the Anglo-Australian
Telescope (AAT), we measured significant secondary eclipses for both planets... | astro-ph_EP |
Asteroid thermal modeling in the presence of reflected sunlight with an
application to WISE/NEOWISE observational data: This study addresses thermal modeling of asteroids with a new derivation of
the Near Earth Asteroid Thermal (NEATM) model which correctly accounts for the
presence of reflected sunlight in short wav... | astro-ph_EP |
Early formation of planetary building blocks inferred from Pb isotopic
ages of chondrules: The most abundant components of primitive meteorites (chondrites) are
millimeter-sized glassy spherical chondrules formed by transient melting events
in the solar protoplanetary disk. Using Pb-Pb dates of 22 individual
chondrul... | astro-ph_EP |
Kepler-91b: a planet at the end of its life. Planet and giant host star
properties via light-curve variations: The evolution of planetary systems is intimately linked to the evolution of
their host star. Our understanding of the whole planetary evolution process is
based on the large planet diversity observed so far.... | astro-ph_EP |
The Habitable Zones of Pre-Main-Sequence Stars: We calculate the pre-main-sequence HZ for stars of spectral classes F to M.
The spatial distribution of liquid water and its change during the
pre-main-sequence phase of protoplanetary systems is important in understanding
how planets become habitable. Such worlds are int... | astro-ph_EP |
Phase Diagram for the Methane-Ethane System and its Implications for
Titan's Lakes: On Titan, methane (CH4) and ethane (C2H6) are the dominant species found in
the lakes and seas. In this study, we have combined laboratory work and
modeling to refine the methane-ethane binary phase diagram at low temperatures
and pro... | astro-ph_EP |
A Northern Ecliptic Survey for Solar System Science: Making an inventory of the Solar System is one of the four fundamental
science requirements for the Large Synoptic Survey Telescope (LSST). The
current baseline footprint for LSST's main Wide-Fast-Deep (WFD) Survey observes
the sky below 0$^\circ$ declination, which ... | astro-ph_EP |
The multi-wavelength phase curves of small bodies: Phase coloring: Context. Small bodies change their brightness due to different motives:
Rotation along their axis or axes, combined with irregular shapes and/or
changing surface properties, or changes in the geometry of observations. In
this work, we tackle the problem... | astro-ph_EP |
Meteor observations with Mini-MegaTORTORA wide-field monitoring system: Here we report on the results of meteor observations with 9-channel
Mini-MegaTORTORA (MMT-9) wide-field optical monitoring system with high
temporal resolution. During first 1.5 years of operation more than 90 thousands
of meteors have been detecte... | astro-ph_EP |
Precession due to a close binary system: An alternative explanation for
ν-Octantis?: We model the secular evolution of a star's orbit when it has a nearby binary
system. We assume a hierarchical triple system where the inter-binary distance
is small in comparison with the distance to the star. We show that the major
... | astro-ph_EP |
Detection of He I $\lambda10830$ Å absorption on HD 189733 b with
CARMENES high-resolution transmission spectroscopy: We present three transit observations of HD 189733 b obtained with the
high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal
is detected in the near-infrared He I triplet at ... | astro-ph_EP |
ACCESS: An optical transmission spectrum of the high-gravity, hot
Jupiter HAT-P-23b: We present a new ground-based visible transmission spectrum of the
high-gravity, hot Jupiter HAT-P-23b, obtained as part of the ACCESS project. We
derive the spectrum from five transits observed between 2016 and 2018, with
combined w... | astro-ph_EP |
Protons in the near-lunar wake observed by the Sub-keV Atom Reflection
Analyzer on board Chandrayaan-1: Significant proton fluxes were detected in the near wake region of the Moon
by an ion mass spectrometer on board Chandrayaan-1. The energy of these
nightside protons is slightly higher than the energy of the solar ... | astro-ph_EP |
Making hot Jupiters in stellar clusters II: efficient formation in
binary systems: Observations suggested that the occurrence rate of hot Jupiters (HJs) in open
clusters is largely consistent with the field ($\sim1\%$) but in the
binary-rich cluster M67, the rate is $\sim5\%$. How does the cluster
environment boost H... | astro-ph_EP |
X-ray irradiation and evaporation of the four young planets around V1298
Tau: Planets around young stars are thought to undergo atmospheric evaporation due
to the high magnetic activity of the host stars. Here we report on X-ray
observations of V1298 Tau, a young star with four transiting exoplanets. We use
X-ray obs... | astro-ph_EP |
Thermosphere and exosphere of Hot-Jupiters: Here we describe the observations and the resulting constraints on the upper
atmosphere (thermosphere and exosphere) of the "Hot-Jupiters". In particular,
observations and theoretical modeling of Hot-Jupiter evaporation are described.
The observations allowed the discovery th... | astro-ph_EP |
Applying the perturbative integral in aeromaneuvers around Mars to
calculate the cost: The perturbative integral method was applied to quantify the contribution of
external forces during a specific interval of time in trajectories of
spacecraft around asteroids and under the Luni-solar influence. However, this
method... | astro-ph_EP |
Methane on Mars: New insights into the sensitivity of CH4 with the
NOMAD/ExoMars spectrometer through its first in-flight calibration: The Nadir and Occultation for MArs Discovery instrument (NOMAD), onboard the
ExoMars Trace Gas Orbiter (TGO) spacecraft was conceived to observe Mars in
solar occultation, nadir, and ... | astro-ph_EP |
A census of $ρ$ Oph candidate members from Gaia DR2: The Ophiuchus cloud complex is one of the best laboratories to study the
earlier stages of the stellar and protoplanetary disc evolution. The wealth of
accurate astrometric measurements contained in the Gaia Data Release 2 can be
used to update the census of Ophiuchu... | astro-ph_EP |
Bayesian constraints on the origin and geology of exo-planetary material
using a population of externally polluted white dwarfs: White dwarfs that have accreted planetary bodies are a powerful probe of the
bulk composition of exoplanetary material. In this paper, we present a Bayesian
model to explain the abundances ... | astro-ph_EP |
Cool Jupiters greatly outnumber their toasty siblings: Occurrence rates
from the Anglo-Australian Planet Search: Our understanding of planetary systems different to our own has grown
dramatically in the past 30 years. However, our efforts to ascertain the degree
to which the Solar system is abnormal or unique have be... | astro-ph_EP |
Six newly-discovered hot Jupiters transiting F/G stars: WASP-87b,
WASP-108b, WASP-109b, WASP-110b, WASP-111b & WASP-112b: We present the discoveries of six transiting hot Jupiters: WASP-87b,
WASP-108b, WASP-109b, WASP-110b, WASP-111b and WASP-112b. The planets have
masses of 0.51--2.2 $M_{\rm Jup}$ and radii of 1.19-... | astro-ph_EP |
Some Comments on Possible Preferred Directions for the SETI Search: The search for extraterrestrial intelligence by looking for signals from
advanced technological civilizations has been ongoing for some decades. We
suggest that it could possibly be made more efficient by focusing on stars from
which the solar system c... | astro-ph_EP |
Physical Characterization of Warm Spitzer-observed Near-Earth Objects: Near-infrared spectroscopy of Near-Earth Objects (NEOs) connects diagnostic
spectral features to specific surface mineralogies. The combination of
spectroscopy with albedos and diameters derived from thermal infrared
observations can increase the sc... | astro-ph_EP |
New and updated convex shape models of asteroids based on optical data
from a large collaboration network: Asteroid modeling efforts in the last decade resulted in a comprehensive
dataset of almost 400 convex shape models and their rotation states. This
amount already provided a deep insight into physical properties ... | astro-ph_EP |
An Early Look of Comet C/2013 A1 (Siding Spring): Breathtaker or
Nightmare?: The dynamically new comet, C/2013 A1 (Siding Spring), is to make a close
approach to Mars on 2014 October 19 at 18:30 UT at a distance of 40+/-1 Martian
radius. Such extremely rare event offers a precious opportunity for the
spacecrafts on M... | astro-ph_EP |
A Hibonite-Pyroxene Spherule in Allan Hills 77307 (CO3.03): Petrography
and Mineralogy: Hibonite-pyroxene spherules are an extremely rare kind of refractory
inclusion that show a wide range of exotic isotopic properties despite their
defining similarity and simplicity in morphology and mineralogy. One such,
relativel... | astro-ph_EP |
Forthcoming mutual events of planets and astrometric radio sources: Radio astronomy observations of close approaches of the Solar system planets
to compact radio sources as well as radio source occultations by planets may be
of large interest for planetary sciences, dynamical astronomy, and testing
gravity theories. In... | astro-ph_EP |
WEIRD: Wide-orbit Exoplanet search with InfraRed Direct imaging: We report results from the Wide-orbit Exoplanet search with InfraRed Direct
imaging (WEIRD), a survey designed to search for Jupiter-like companions on
very wide orbits (1000 to 5000 AU) around young stars ($<$120 Myr) that are
known members of moving gro... | astro-ph_EP |
Trace Elemental Behavior in the Solar Nebula: Synchrotron X-ray
Fluorescence Analyses of CM and CR Chondritic Iron Sulfides and Associated
Metal: We have performed a coordinated focused ion beam (FIB)-scanning and
transmission electron microscopy (S/TEM), electron probe microanalysis
(EMPA)-synchrotron X-ray fluore... | astro-ph_EP |
AMD-stability in presence of first order Mean Motion Resonances: The AMD-stability criterion allows to discriminate between a-priori stable
planetary systems and systems for which the stability is not granted and needs
further investigations. AMD-stability is based on the conservation of the
Angular Momentum Deficit (A... | astro-ph_EP |
Lunar-like silicate material forms the Earth quasisatellite (469219)
2016 HO3 Kamo`oalewa: Little is known about Earth quasi-satellites, a class of near-Earth small
solar system bodies that orbit the sun but remain close to the Earth, because
they are faint and difficult to observe. Here we use the Large Binocular
Te... | astro-ph_EP |
Modeling the flyby anomalies with dark matter scattering: update with
additional data and further predictions: We continue our exploration of whether the flyby anomalies can be explained
by scattering of spacecraft nucleons from dark matter gravitationally bound to
the earth, with the addition of data from five new f... | astro-ph_EP |
Direct Imaging Search for Extrasolar Planets in the Pleiades: We carried out an imaging survey for extrasolar planets around stars in the
Pleiades (125 Myr, 135 pc) in the $H$ and $K_{S}$ bands using HiCIAO combined
with the adaptive optics, AO188, on the Subaru telescope. We found 13 companion
candidates fainter than ... | astro-ph_EP |
Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy: We obtained spectra, in the wavelength range \lambda = 995 - 1769 nm, of all
four known planets orbiting the star HR 8799. Using the suite of
instrumentation known as Project 1640 on the Palomar 5-m Hale Telescope, we
acquired data at two epochs. Th... | astro-ph_EP |
Evidence of fast pebble growth near condensation fronts in the HL Tau
protoplanetary disk: Water and simple organic molecular ices dominate the mass of solid materials
available for planetesimal and planet formation beyond the water snow line.
Here we analyze ALMA long baseline 2.9, 1.3 and 0.87 mm continuum images o... | astro-ph_EP |
The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b,
WASP-38b and HAT-P-8b from Rossiter-McLaughlin observations: We present observations of the Rossiter-McLaughlin effect for the transiting
exoplanet systems WASP-1, WASP-24, WASP-38 and HAT-P-8, and deduce the
orientations of the planetary orbits wi... | astro-ph_EP |
The CORALIE survey for southern extrasolar planets XIX. Brown dwarfs and
stellar companions unveiled by radial velocity and astrometry: A historical planet-search on a sample of 1647 nearby southern main sequence
stars has been ongoing since 1998 with the CORALIE spectrograph at La Silla
Observatory, with a backup su... | astro-ph_EP |
Transiting Planet Candidates Beyond the Snow Line Detected by Visual
Inspection of 7557 Kepler Objects of Interest: We visually inspected the light curves of 7557 Kepler Objects of Interest
(KOIs) to search for single transit events (STEs) possibly due to long-period
giant planets. We identified 28 STEs in 24 KOIs, a... | astro-ph_EP |
Moderate-Resolution $K$-Band Spectroscopy of Substellar Companion
$κ$ Andromedae b: We present moderate-resolution ($R\sim4000$) $K$ band spectra of the
"super-Jupiter," $\kappa$ Andromedae b. The data were taken with the OSIRIS
integral field spectrograph at Keck Observatory. The spectra reveal resolved
molecular li... | astro-ph_EP |
Non-adiabatic tidal oscillations induced by a planetary companion: We calculate the dynamical tides raised by a close planetary companion on
non-rotating stars of $1$ $\text{M}_{\odot}$ and $1.4$ $\text{M}_{\odot}$.
Using the Henyey method, we solve the fully non-adiabatic equations throughout
the star. The horizontal ... | astro-ph_EP |
Asteroid 2017 FZ2 et al.: signs of recent mass-shedding from YORP?: The first direct detection of the asteroidal YORP effect, a phenomenon that
changes the spin states of small bodies due to thermal reemission of sunlight
from their surfaces, was obtained for (54509) YORP 2000 PH5. Such an alteration
can slowly increas... | astro-ph_EP |
The birth environment of the solar system constrained by the relative
abundances of the solar radionuclides: The relative abundances of the radionuclides in the solar system at the time
of its birth are crucial arbiters for competing hypotheses regarding the birth
environment of the Sun. The presence of short-lived r... | astro-ph_EP |
ALMA Observations of the DART Impact: Characterizing the Ejecta at
Sub-Millimeter Wavelengths: We report observations of the Didymos-Dimorphos binary asteroid system using
the Atacama Large Millimeter/Submillimeter Array (ALMA) and the Atacama Compact
Array (ACA) in support of the Double Asteroid Redirection Test (DA... | astro-ph_EP |
Sending a Spacecraft to Interstellar Comet 2I/Borisov: In August 2019, a second interstellar object 2I/Borisov was discovered 2
years after the discovery of the first known interstellar object, 1I/'Oumuamua.
Can we send a spacecraft to this object, using existing technologies? In this
paper we assess the technical feas... | astro-ph_EP |
Hydrogen Greenhouse Planets Beyond the Habitable Zone: We show that collision-induced absorption allows molecular hydrogen to act as
an incondensible greenhouse gas, and that bars or tens of bars of primordial
H2-He mixtures can maintain surface temperatures above the freezing point of
water well beyond the "classical"... | astro-ph_EP |
Peering into the formation history of beta Pictoris b with VLTI/GRAVITY
long baseline interferometry: Our objective is to estimate the C/O ratio in the atmosphere of beta Pictoris
b and obtain an estimate of the dynamical mass of the planet, as well as to
refine its orbital parameters using high-precision astrometry.... | astro-ph_EP |
Chemical consequences of the C/O ratio on hot Jupiters: Examples from
WASP-12b,CoRoT-2b, XO-1b, and HD 189733b: Motivated by recent spectroscopic evidence for carbon-rich atmospheres on
some transiting exoplanets, we investigate the influence of the C/O ratio on
the chemistry, composition, and spectra of extrasolar g... | astro-ph_EP |
On the frequency of planetary systems around G-dwarfs: We determine the fraction of G-dwarf stars that could host stable planetary
systems based on the observed properties of binaries in the Galactic field, and
in various postulated primordial binary populations, which assume that the
primordial binary fraction is high... | astro-ph_EP |
High-temperature Dust Condensation around an AGB Star: Evidence from a
Highly Pristine Presolar Corundum: Corundum ($\alpha$-Al$_{2}$O$_{3}$) and amorphous or metastable
Al$_{2}$O$_{3}$ are common components of circumstellar dust observed around
O-rich asymptotic giant branch (AGB) stars and found in primitive meteor... | astro-ph_EP |
Detection of Na in WASP-21b's lower and upper atmosphere: Optical transmission spectroscopy provides crucial constraints on the
reference pressure levels and scattering properties for hot Jupiter
atmospheres. For certain planets, where alkali atoms are detected in the
atmosphere, their line profiles could serve as a go... | astro-ph_EP |
Orbital evolution of potentially habitable planets of tidally
interacting binary stars: We simulate the coupled stellar and tidal evolution of short-period binary
stars (orbital period $P_{orb} \lsim$8 days) to investigate the orbital
oscillations, instellation cycles, and orbital stability of circumbinary
planets (C... | astro-ph_EP |
The DRAKE mission: finding the frequency of life in the Cosmos: In the search for life in the Universe, exoplanets represent numerous natural
experiments in planet formation, evolution, and the emergence of life. This
raises the fascinating prospect of evaluating cosmic life on a statistical
basis. One key statistic is... | astro-ph_EP |
TOI-1468: A system of two transiting planets, a super-Earth and a
mini-Neptune, on opposite sides of the radius valley: We report the discovery and characterization of two small transiting planets
orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913), whose transit
signals were detected in the photometric time se... | astro-ph_EP |
The fragmentation criteria in local vertically stratified
self-gravitating disk simulations: Massive circumstellar disks are prone to gravitational instabilities, which
trigger the formation of spiral arms that can fragment into bound clumps under
the right conditions. Two dimensional simulations of self-gravitating ... | astro-ph_EP |
Korean-Japanese Planet Search Program: Substellar Companions around
Intermediate-Mass Giants: A Korean-Japanese planet search program has been carried out using the 1.8m
telescope at Bohyunsan Optical Astronomy Observatory (BOAO) in Korea, and the
1.88m telescope at Okayama Astrophysical Observatory (OAO) in Japan to... | astro-ph_EP |
HAT-P-54b: A hot jupiter transiting a 0.64 Msun star in field 0 of the
K2 mission: We report the discovery of HAT-P-54b, a planet transiting a late K dwarf star
in field 0 of the NASA K2 mission. We combine ground-based photometric light
curves with radial velocity measurements to determine the physical parameters
of... | astro-ph_EP |
The Formation Mechanism of Gas Giants on Wide Orbits: The recent discoveries of massive planets on ultra-wide orbits of HR 8799
(Marois et al. 2008) and Fomalhaut (Kalas et al. 2008) present a new challenge
for planet formation theorists. Our goal is to figure out which of three giant
planet formation mechanisms--core ... | astro-ph_EP |
Circular periodic orbits, resonance capture and inclination excitation
during type II migration: We consider planetary systems evolving under the effect of a Stokes-type
dissipative force mimicking the outcome of a type II migration process. As
inward migration proceeds and the planets follow the circular family (the... | astro-ph_EP |
The Atmosphere and Interior Structure of HAT-P-13b from Spitzer
Secondary Eclipses: We present {\em Spitzer} secondary-eclipse observations of the hot Jupiter
HAT-P-13 b in the 3.6 {\micron} and 4.5 {\micron} bands. HAT-P-13 b inhabits a
two-planet system with a configuration that enables constraints on the planet's
... | astro-ph_EP |
An extensive radial velocity survey toward NGC 6253: The old and metal rich open cluster NGC 6253 was observed with the FLAMES
multi-object spectrograph during an extensive radial velocity campaign
monitoring 317 stars with a median of 15 epochs per object. All the targeted
stars are located along the upper main sequen... | astro-ph_EP |
A sub-Neptune sized planet transiting the M2.5-dwarf G 9-40: Validation
with the Habitable-zone Planet Finder: We validate the discovery of a 2 Earth radii sub-Neptune-size planet around
the nearby high proper motion M2.5-dwarf G 9-40 (EPIC 212048748), using
high-precision near-infrared (NIR) radial velocity (RV) obs... | astro-ph_EP |
HIFI Observations of Water in the Atmosphere of Comet C/2008 Q3
(Garradd): High-resolution far-infrared and sub-millimetre spectroscopy of water lines
is an important tool to understand the physical and chemical properties of
cometary atmospheres. We present observations of several rotational ortho- and
para-water tr... | astro-ph_EP |
Exoplanets Beyond the Solar Neighbourhood: Galactic Tidal Perturbations: The majority of Milky Way extrasolar planets likely reside within a few kpc
of the Galactic centre. The Galactic tidal forces acting on planets scale
inversely with radius in the Galaxy and so are much greater in the inner Galaxy
than in the Solar... | astro-ph_EP |
Silicon isotopes reveal recycled altered oceanic crust in the mantle
sources of Ocean Island Basalts: The study of silicon (Si) isotopes in ocean island basalts (OIB) has the
potential to discern between different models for the origins of geochemical
heterogeneities in the mantle. Relatively large (several per mil p... | astro-ph_EP |
A linear distribution of orbits in compact planetary systems?: We report a linear ordering of orbits in a sample of multiple extrasolar
planetary systems with super-Earth planets. We selected 20 cases, mostly
discovered by the Kepler mission, hosting at least four planets within \sim 0.5
au. The semi-major axis a_n of ... | astro-ph_EP |
Detecting Transits of Planetary Companions to Giant Stars: Of the approximately 350 extrasolar planets currently known, of order 10%
orbit evolved stars with radii R >~ 2.5 R_sun. These planets are of particular
interest because they tend to orbit more massive hosts, and have been subjected
to variable stellar insolati... | astro-ph_EP |
Formation of eccentric gas discs from sublimating or partially disrupted
asteroids orbiting white dwarfs: Of the 21 known gaseous debris discs around white dwarfs, a large fraction of
them display observational features that are well described by an eccentric
distribution of gas. In the absence of embedded objects or... | astro-ph_EP |
A possible flyby anomaly for Juno at Jupiter: In the last decades there have been an increasing interest in improving the
accuracy of spacecraft navigation and trajectory data. In the course of this
plan some anomalies have been found that cannot, in principle, be explained in
the context of the most accurate orbital m... | astro-ph_EP |
Excitation Properties of Photopigments and Their Possible Dependence on
the Host Star: Photosynthesis is a plausible pathway for the sustenance of a substantial
biosphere on an exoplanet. In fact, it is also anticipated to create
distinctive biosignatures detectable by next-generation telescopes. In this
work, we exp... | astro-ph_EP |
Mineralogical Characterization and Phase Angle Study of Two Binary
Near-Earth Asteroids, Potential Targets for NASA's Janus Mission: Ground-based characterization of spacecraft targets prior to mission
operations is critical to properly plan and execute measurements. Understanding
surface properties, like mineralogic... | astro-ph_EP |
Twenty years of SpeX: Accuracy limits of spectral slope measurements in
asteroid spectroscopy: We examined two decades of SpeX/NASA Infrared Telescope Facility observations
from the Small Main-Belt Asteroid Spectroscopic Survey (SMASS) and the
MIT-Hawaii Near-Earth Object Spectroscopic Survey (MITHNEOS) to investigat... | astro-ph_EP |
Elliptical instability in terrestrial planets and moons: The presence of celestial companions means that any planet may be subject to
three kinds of harmonic mechanical forcing: tides, precession/nutation, and
libration. These forcings can generate flows in internal fluid layers, such as
fluid cores and subsurface ocea... | astro-ph_EP |
Forward and Inverse Modeling of the Emission and Transmission Spectrum
of GJ 436b: Investigating Metal Enrichment, Tidal Heating, and Clouds: The Neptune-mass GJ 436b is one of the most-studied transiting exoplanets
with repeated measurements of both its thermal emission and transmission
spectra. We build on previous... | astro-ph_EP |
MOA-2010-BLG-073L: An M-Dwarf with a Substellar Companion at the
Planet/Brown Dwarf Boundary: We present an analysis of the anomalous microlensing event, MOA-2010-BLG-073,
announced by the Microlensing Observations in Astrophysics survey on
2010-03-18.
This event was remarkable because the source was previously kno... | astro-ph_EP |
Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS)
VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b: WASP-127b is one of the puffiest exoplanets found to date, with a mass only
$3.4$ Neptune masses, but a radius larger than Jupiter. It is also located at
the border of t... | astro-ph_EP |
Hydrothermal formation of Clay-Carbonate alteration assemblages in the
Nili Fossae region of Mars: The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) has returned
observations of the Nili Fossae region indicating the presence of Mg- carbonate
in small (<10km sq2), relatively bright rock units that are c... | astro-ph_EP |
Discovery and characterization of the exoplanets WASP-148b and c. A
transiting system with two interacting giant planets: We present the discovery and characterization of WASP-148, a new extrasolar
system that includes at least two giant planets. The host star is a slowly
rotating inactive late-G dwarf with a V=12 ma... | astro-ph_EP |
The Role of Disc Self-Gravity in Circumbinary Planet Systems: II. Planet
Evolution: We present the results of hydrodynamic simulations examining migration and
growth of planets embedded in self-gravitating circumbinary discs. The binary
star parameters are chosen to mimic those of the Kepler-16, -34 and -35
systems; ... | astro-ph_EP |
Alfnoor: assessing the information content of Ariel's low resolution
spectra with planetary population studies: The ARIEL Space Telescope will provide a large and diverse sample of
exoplanet spectra, performing spectroscopic observations of about 1000
exoplanets in the wavelength range $0.5 \to 7.8 \; \mu m$. In this... | astro-ph_EP |
The Great Saturn Storm of 2010-2011: In December 2010, a major storm erupted in Saturn's northern hemisphere near
37 degree planetographic latitude. This rather surprising event, occurring at
an unexpected latitude and time, is the sixth "Great White Spot" (GWS) storm
observed over the last century and a half. Such GWS... | astro-ph_EP |
Resolved near-UV hydrogen emission lines at 40-Myr super-Jovian
protoplanet Delorme 1 (AB)b: Indications of magnetospheric accretion: We have followed up on our observations of the ~ 40-Myr, and still accreting,
PMC Delorme 1 (AB)b. We used high-resolution spectroscopy to characterise the
accretion process further by... | astro-ph_EP |
Solving the Alhazen-Ptolemy Problem: Determining Specular Points on
Spherical Surfaces for Radiative Transfer of Titan's Seas: Given a light source, a spherical reflector, and an observer, where on the
surface of the sphere will the light be directly reflected to the observer,
i.e. where is the the specular point? Th... | astro-ph_EP |
Dynamical effects on the classical Kuiper Belt during the
excited-Neptune model: The link between the dynamical evolution of the giant planets and the Kuiper
Belt orbital structure can provide clues and insight about the dynamical
history of the Solar System. The classical region of the Kuiper Belt has two
population... | astro-ph_EP |
OGLE-2017-BLG-1434Lb: Confirmation of a Cold Super-Earth using Keck
Adaptive Optics: The microlensing event OGLE-2017-BLG-1434 features a cold super-Earth planet
which is one of eleven microlensing planets with a planet-host star mass ratio
$q < 1 \times 10^{-4}$. We provide an additional mass-distance constraint on
... | astro-ph_EP |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.