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19922026
Showing 2021 · astro-ph.EPShow all

27 papers · 2 filters

astro-ph.EP2021★ 124 cited

Planetesimal rings as the cause of the Solar System's planetary architecture

Andre Izidoro, Rajdeep Dasgupta, Sean N. Raymond +3

Astronomical observations reveal that protoplanetary disks around young stars commonly have ring- and gap-like structures in their dust distributions. These features are associated…

astro-ph.EP2021★ 102 cited

A rich population of free-floating planets in the Upper Scorpius young stellar association

Núria Miret-Roig, Hervé Bouy, Sean N. Raymond +9

The nature and origin of free-floating planets (FFPs) are still largely unconstrained because of a lack of large homogeneous samples to enable a statistical analysis of their prope…

astro-ph.EP2021★ 1 cited

Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging

Xiao-Jia Xie, Subo Dong, Yossi Shvartzvald +10

We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of…

astro-ph.EP2021★ 43 cited

An upper limit on late accretion and water delivery in the Trappist-1 exoplanet system

Sean N. Raymond, Andre Izidoro, Emeline Bolmont +9

The Trappist-1 system contains seven roughly Earth-sized planets locked in a multi-resonant orbital configuration, which has enabled precise measurements of the planets' masses and…

astro-ph.EP2021

The Onset of a Globally Ice-covered State for a Land Planet

T. Kodama, H. Genda, J. Leconte +1

The climates of terrestrial planets with a small amount of water on their surface, called land planets, are significantly different from the climates of planets having a large amou…

astro-ph.EP2021★ 19 cited

How does the background atmosphere affect the onset of the runaway greenhouse ?

G. Chaverot, M. Turbet, E. Bolmont +1

As the insolation of an Earth-like (exo)planet with a large amount of water increases, its surface and atmospheric temperatures also increase, eventually leading to a catastrophic…

astro-ph.EP2021★ 25 cited

Toward a multidimensional analysis of transmission spectroscopy. Part I: Computation of transmission spectra using a 1D, 2D, or 3D atmosphere structure

Aurélien Falco, Tiziano Zingales, William Pluriel +1

Considering the relatively high precision that will be reached by future observatories, it has recently become clear that one dimensional (1D) atmospheric models, in which the atmo…

astro-ph.EP2021★ 26 cited

The "Breaking The Chains" migration model for super-Earths formation: the effect of collisional fragmentation

Leandro Esteves, André Izidoro, Bertram Bitsch +4

Planets between 1-4 Earth radii with orbital periods <100 days are strikingly common. The migration model proposes that super-Earths migrate inwards and pile up at the disk inner e…

astro-ph.EP2021★ 56 cited

ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides

A. Kokori, A. Tsiaras, B. Edwards +102

The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency. Th…

astro-ph.EP2021★ 38 cited

Towards multi-dimensional analysis of transmission spectroscopy. Part II: Day-night induced biases in retrievals from hot to ultra-hot Jupiters

William Pluriel, Jeremy Leconte, Vivien Parmentier +4

Hot Jupiters are very good targets for transmission spectroscopy analysis. Their atmospheres have a large scale height implying a high signal to noise ratio. As these planets orbit…

astro-ph.EP2021★ 145 cited

Day-night cloud asymmetry prevents early oceans on Venus but not on Earth

Martin Turbet, Emeline Bolmont, Guillaume Chaverot +3

Earth has had oceans for nearly four billion years and Mars had lakes and rivers 3.5-3.8 billion years ago. However, it is still unknown whether water has ever condensed on the sur…

astro-ph.EP2021★ 80 cited

A Jovian analogue orbiting a white dwarf star

J. W. Blackman, J-P. Beaulieu, D. P. Bennett +13

Studies have shown that remnants of destroyed planets and debris-disk planetesimals can survive the volatile evolution of their host stars into white dwarfs, but detection of intac…

astro-ph.EP2021★ 18 cited

Vertical settling of pebbles in turbulent circumbinary discs and the in situ formation of circumbinary planets

Arnaud Pierens, Richard P. Nelson, Colin P. McNally

The inner-most regions of circumbinary discs are unstable to a parametric instability whose non-linear evolution is hydrodynamical turbulence. This results in significant particle…

astro-ph.EP2021★ 15 cited

Discovery of Molecular Line Polarization in the Disk of TW Hya

Richard Teague, Chat L. H. Hull, Stéphane Guilloteau +7

We report observations of polarized line and continuum emission from the disk of TW~Hya using the Atacama Large Millimeter/submillimeter Array. We target three emission lines, $^{1…

astro-ph.EP2021★ 14 cited

Mapping the zonal winds of Jupiter's stratospheric equatorial oscillation

B. Benmahi, T. Cavalié, T. K. Greathouse +5

Since the 1950s, quasi-periodic oscillations have been studied in the terrestrial equatorial stratosphere. Other planets of the solar system present (or are expected to present) su…

astro-ph.EP2021★ 15 cited

Revealing asymmetrical dust distribution in the inner regions of HD 141569

Garima Singh, Trisha Bhowmik, Anthony Boccaletti +42

We obtained polarimetric differential imaging of a gas-rich debris disk around HD 141569A with SPHERE in the H-band to compare the scattering properties of the innermost ring at 44…

astro-ph.EP2021★ 3 cited

OGLE-2017-BLG-1434Lb: Confirmation of a Cold Super-Earth using Keck Adaptive Optics

J. W. Blackman, J. -P. Beaulieu, A. A. Cole +5

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 .…

astro-ph.EP2021★ 6 cited

Uncovering the ultimate planet impostor. An eclipsing brown dwarf in a hierarchical triple with two evolved stars

J. Lillo-Box, Á. Ribas, B. Montesinos +14

Exoplanet searches through space-based photometric time series have shown to be very efficient in recent years. However, follow-up efforts on the detected planet candidates have be…

astro-ph.EP2021★ 18 cited

The early instability scenario: Mars' mass explained by Jupiter's orbit

Matthew S. Clement, Nathan A. Kaib, Sean N. Raymond +1

The formation of the solar system's giant planets predated the ultimate epoch of massive impacts that concluded the process of terrestrial planet formation. Following their formati…

astro-ph.EP2021★ 20 cited

Born extra-eccentric: A broad spectrum of primordial configurations of the gas giants that match their present-day orbits

Matthew S. Clement, Rogerio Deienno, Nathan A. Kaib +3

In a recent paper we proposed that the giant planets' primordial orbits may have been eccentric (~0.05), and used a suite of dynamical simulations to show outcomes of the giant pla…

astro-ph.EP2021★ 54 cited

Dry or water world? How the water contents of inner sub-Neptunes constrain giant planet formation and the location of the water ice line

Bertram Bitsch, Sean N. Raymond, Lars A. Buchhave +3

In the pebble accretion scenario, the pebbles that form planets drift inward from the outer disk regions, carrying water ice with them. At the water ice line, the water ice on the…

astro-ph.EP2021★ 62 cited

ARES V: No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b

Lorenzo V. Mugnai, Darius Modirrousta-Galian, Billy Edwards +25

We present a study on the spatially scanned spectroscopic observations of the transit of GJ 1132 b, a warm (500 K) Super-Earth (1.13 R) that was obtained with the G1…

astro-ph.EP2021★ 8 cited

Orbital stability of compact three-planet systems, II: Post-instability impact behaviour

Peter Bartram, Alexander Wittig, Jack J. Lissauer +2

Recent observational missions have uncovered a significant number of compact multi-exoplanet systems. The tight orbital spacing of these systems has led to much effort being applie…

astro-ph.EP2021★ 17 cited

Orbital stability of compact three-planet systems, I: Dependence of system lifetimes on initial orbital separations and longitudes

Jack J. Lissauer, Sacha Gavino

We explore the orbital dynamics of systems consisting of three planets, each as massive as the Earth, on coplanar, initially circular, orbits about a star of one solar mass. The in…