Showing 2022 · astro-ph.EPShow all

109 papers · 2 filters

astro-ph.EP2022★ 8 cited

Discovery of TOI-1260d and the characterisation of the multi-planet system

Kristine W. F. Lam, J. Cabrera, M. J. Hooton +83

We report the discovery of a third planet transiting the star TOI-1260, previously known to host two transiting sub-Neptune planets with orbital periods of 3.127 and 7.493 days, re…

astro-ph.EP2022★ 15 cited

Dynamics of the Great Oxidation Event from a 3D photochemical-climate model

Adam Yassin Jaziri, Benjamin Charnay, Franck Selsis +2

From the Archean toward the Proterozoic, the Earth's atmosphere underwent a major shift from anoxic to oxic conditions, around 2.4 to 2.1 Gyr, known as the Great Oxidation Event (G…

astro-ph.EP2022★ 19 cited

Effect of a magnetosphere compression on Jovian radio emissions: in situ case study using Juno data

C. K. Louis, C. M. Jackman, G. Hospodarsky +13

During its 53-day polar orbit around Jupiter, Juno often crosses the boundaries of the Jovian magnetosphere (namely the magnetopause and bow shock). From the boundary locations, th…

astro-ph.EP2022★ 14 cited

An efficient Monte Carlo model for the slowing down of photoelectrons. Application to H- in exoplanet atmospheres

Antonio García Muñoz

Photoelectrons, the fast electrons produced in the photoionization of planetary atmospheres, drive transformations in the atmospheric gas that are often inhibited by energy conside…

astro-ph.EP2022★ 54 cited

Solubility of water in peridotite liquids and the prevalence of steam atmospheres on rocky planets

Paolo A. Sossi, Peter M. E. Tollan, James Badro +1

Atmospheres are products of time-integrated mass exchange between the surface of a planet and its interior. On Earth and other planetary bodies, magma oceans likely marked signific…

astro-ph.EP2022★ 9 cited

Saturn's Seasonal Variability from Four Decades of Ground-Based Mid-Infrared Observations

James S. D. Blake, Leigh N. Fletcher, Glenn S. Orton +8

A multi-decade record of ground-based mid-infrared (7-25 m) images of Saturn is used to explore seasonal and non-seasonal variability in thermal emission over more than a Saturn…

astro-ph.EP2022★ 232 cited

Early Release Science of the exoplanet WASP-39b with JWST NIRISS

Adina D. Feinstein, Michael Radica, Luis Welbanks +86

Transmission spectroscopy provides insight into the atmospheric properties and consequently the formation history, physics, and chemistry of transiting exoplanets. However, obtaini…

astro-ph.EP2022★ 197 cited

Early Release Science of the exoplanet WASP-39b with JWST NIRCam

Eva-Maria Ahrer, Kevin B. Stevenson, Megan Mansfield +96

Measuring the metallicity and carbon-to-oxygen (C/O) ratio in exoplanet atmospheres is a fundamental step towards constraining the dominant chemical processes at work and, if in eq…

astro-ph.EP2022★ 274 cited

Early Release Science of the Exoplanet WASP-39b with JWST NIRSpec G395H

Lili Alderson, Hannah R. Wakeford, Munazza K. Alam +89

Measuring the abundances of carbon and oxygen in exoplanet atmospheres is considered a crucial avenue for unlocking the formation and evolution of exoplanetary systems. Access to a…

astro-ph.EP2022★ 327 cited

Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM

Z. Rustamkulov, D. K. Sing, S. Mukherjee +91

Transmission spectroscopy of exoplanets has revealed signatures of water vapor, aerosols, and alkali metals in a few dozen exoplanet atmospheres. However, these previous inferences…

astro-ph.EP2022★ 10 cited

A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

F. Kiefer, G. Hébrard, E. Martioli +39

TOI-1695 is a V-mag=13 M-dwarf star from the northern hemisphere at 45pc from the Sun, around which a 3.134-day periodic transit signal from a super-Earth candidate was identif…

astro-ph.EP2022★ 5 cited

The multichord stellar occultation by the centaur Bienor on January 11, 2019

E. Fernández-Valenzuela, N. Morales, M. Vara-Lubiano +42

Within our program of physical characterization of trans-Neptunian objects and centaurs, we predicted a stellar occultation by the centaur (54598) Bienor to occur on January 11, 20…

astro-ph.EP2022★ 29 cited

Examining the orbital decay targets KELT-9 b, KELT-16 b and WASP-4 b, and the transit-timing variations of HD 97658 b

J. -V. Harre, A. M. S. Smith, S. C. C. Barros +87

Tidal orbital decay is suspected to occur especially for hot Jupiters, with the only observationally confirmed case of this being WASP-12 b. By examining this effect, information o…

astro-ph.EP2022★ 23 cited

Saturn's atmospheric response to the large influx of ring material inferred from Cassini INMS measurements

Julianne I. Moses, Zarah L. Brown, Tommi T. Koskinen +12

During the Grand Finale stage of the Cassini mission, organic-rich ring material was discovered to be flowing into Saturn's equatorial upper atmosphere at a surprisingly large rate…

astro-ph.EP2022★ 72 cited

Signatures of Strong Magnetization and Metal-Poor Atmosphere for a Neptune-Size Exoplanet

Lotfi Ben-Jaffel, Gilda E. Ballester, Antonio García Muñoz +10

The magnetosphere of an exoplanet has yet to be unambiguously detected. Investigations of star-planet interaction and neutral atomic hydrogen absorption during transit to detect ma…

astro-ph.EP2022★ 22 cited

55 Cancri e's occultation captured with CHEOPS

B. -O. Demory, S. Sulis, E. Meier Valdes +73

Past occultation and phase-curve observations of the ultra-short period super-Earth 55 Cnc e obtained at visible and infrared wavelengths have been challenging to reconcile with a…

astro-ph.EP2022★ 14 cited

The high-albedo, low polarization disk around HD 114082 harbouring a Jupiter-sized transiting planet

N. Engler, J. Milli, R. Gratton +36

We present new optical and near-IR images of debris disk around the F-type star HD 114082. We obtained direct imaging observations and analysed the TESS photometric time series dat…

astro-ph.EP2022★ 262 cited

Photochemically-produced SO in the atmosphere of WASP-39b

Shang-Min Tsai, Elspeth K. H. Lee, Diana Powell +82

Photochemistry is a fundamental process of planetary atmospheres that regulates the atmospheric composition and stability. However, no unambiguous photochemical products have been…

astro-ph.EP2022★ 9 cited

How do tidal waves interact with convective vortices in rapidly-rotating planets and stars?

Virgile Dandoy, Junho Park, Kyle Augustson +2

The dissipation of tidal inertial waves in planetary and stellar convective regions is one of the key mechanisms that drive the evolution of star-planet/planet-moon systems. In thi…

astro-ph.EP2022★ 42 cited

Peering into the Young Planetary System AB Pic. Atmosphere, Orbit, Obliquity & Second Planetary Candidate

P. Palma-Bifani, G. Chauvin, M. Bonnefoy +24

We aim to revisit the system AB Pic which has a known companion at the exoplanet/ brown-dwarf boundary. We based this study on a rich set of observations to investigate the compani…

astro-ph.EP2022★ 7 cited

Evolution of pits at the surface of 67P/Churyumov-Gerasimenko

Selma Benseguane, Aurélie Guilbert-Lepoutre, Jérémie Lasue +6

The observation of pits at the surface of comets offers the opportunity to take a glimpse into the properties and the mechanisms that shape a nucleus through cometary activity. If…

astro-ph.EP2022★ 6 cited

Is binning always sinning? The impact of time-averaging for exoplanet phase curves

Giuseppe Morello, Achrène Dyrek, Quentin Changeat

We explore how finite integration time or temporal binning can affect the analysis of exoplanet phase-curves. We provide analytical formulae to account for this effect or, if negle…

astro-ph.EP2022★ 3 cited

The effect of collisional erosion on the composition of Earth-analog planets in Grand Tack models: Implications for the formation of the Earth

Allibert L., Siebert J., Charnoz S. +2

Impact-induced erosion of the Earth's early crust during accretion of terrestrial bodies can significantly modify the primordial chemical composition of the Bulk Silicate Earth (BS…

astro-ph.EP2022★ 10 cited

Characterization of the HD 108236 system with CHEOPS and TESS. Confirmation of a fifth transiting planet

S. Hoyer, A. Bonfanti, A. Leleu +87

The HD108236 system was first announced with the detection of four small planets based on TESS data. Shortly after, the transit of an additional planet with a period of 29.54d was…