output
19912026
Showing 2022 · astro-ph.EPShow all

104 papers · 2 filters

astro-ph.EP2022★ 15 cited

NEID Reveals that The Young Warm Neptune TOI-2076 b Has a Low Obliquity

Robert C. Frazier, Gudmundur Stefansson, Suvrath Mahadevan +27

TOI-2076 b is a sub-Neptune-sized planet () that transits a young () bright () K-dwarf hosting a system of three transiting…

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★ 6 cited

Dust Rings and Cavities in the Protoplanetary Disks around HD 163296 and DoAr 44

Harrison Leiendecker, Hannah Jang-Condell, Neal J. Turner +1

We model substructure in the protoplanetary disks around DoAr 44 and HD 163296 in order to better understand the conditions under which planets may form. We match archival millimet…

astro-ph.EP2022★ 7 cited

Is the hot, dense sub-Neptune TOI-824b an exposed Neptune mantle? Spitzer detection of the hot day side and reanalysis of the interior composition

Pierre-Alexis Roy, Björn Benneke, Caroline Piaulet +10

The Kepler and TESS missions revealed a remarkable abundance of sub-Neptune exoplanets. Despite this abundance, our understanding of the nature and compositional diversity of sub-N…

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★ 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★ 5 cited

Spectropolarimetry as a Means to Address Cloud Composition and Habitability for a Cloudy Exoplanetary Atmosphere in the Habitable Zone

Robert A. West, Philip Dumont, Renyu Hu +3

In our solar system, the densely cloud-covered atmosphere of Venus stands out as an example of how polarimetry can be used to gain information on cloud composition and particle mea…

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★ 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

Inner Habitable Zone Boundary for Eccentric Exoplanets

Xuan Ji, Nora Bailey, Daniel Fabrycky +3

The climate of a planet can be strongly affected by its eccentricity due to variations in the stellar flux. There are two limits for the dependence of the inner habitable zone boun…

astro-ph.EP2022★ 21 cited

Unexpected Long-Term Variability in Jupiter's Tropospheric Temperatures

Glenn S. Orton, Arrate Antunano, Leigh N. Fletcher +9

An essential component of planetary climatology is knowledge of the tropospheric temperature field and its variability. Previous studies of Jupiter hinted at periodic behavior that…

astro-ph.EP2022★ 22 cited

Phase II of the Keck Planet Imager and Characterizer: system-level laboratory characterization and preliminary on-sky commissioning

Daniel Echeverri, Nemanja Jovanovic, Jacques-Robert Delorme +35

The Keck Planet Imager and Characterizer (KPIC) is a series of upgrades for the Keck II Adaptive Optics (AO) system and the NIRSPEC spectrograph to enable diffraction-limited, high…

astro-ph.EP2022★ 5 cited

Broadband vortex fiber nulling: high-dispersion exoplanet science at the diffraction limit

Daniel Echeverri, Garreth Ruane, Nemanja Jovanovic +6

As the number of confirmed exoplanets continues to grow, there is an increased push to spectrally characterize them to determine their atmospheric composition, formation paths, rot…

astro-ph.EP2022★ 17 cited

TOI-1075 b: A Dense, Massive, Ultra-Short Period Hot Super-Earth Straddling the Radius Gap

Zahra Essack, Avi Shporer, Jennifer A. Burt +29

Populating the exoplanet mass-radius diagram in order to identify the underlying relationship that governs planet composition is driving an interdisciplinary effort within the exop…

astro-ph.EP2022★ 25 cited

Callisto's atmosphere: First evidence for H2 and constraints on H2O

Shane R. Carberry Mogan, Orenthal J. Tucker, Robert E. Johnson +8

We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope (Roth et al. 2017a) from sublimated H2O and radiolytically produce…

astro-ph.EP2022★ 40 cited

Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-Resolution Data

Ji Wang, Jason J. Wang, Jean-Baptiste Ruffio +29

The formation and evolution pathway for the directly-imaged multi-planetary system HR 8799 remains mysterious. Accurate constraints on the chemical composition of the planetary atm…

astro-ph.EP2022★ 2 cited

Halting Migration in Magnetospherically Sculpted Protoplanetary Disks

Tze Yeung Mathew Yu, Brad Hansen, Yasuhiro Hasegawa

We present a physically motivated model for the manner in which a stellar magnetic field sculpts the inner edge of a protoplanetary disk, and examine the consequence for the migrat…

astro-ph.EP2022★ 28 cited

Spin State Evolution of (99942) Apophis during its 2029 Earth Encounter

C. J. Benson, D. J. Scheeres, M. Brozovic +3

We explore the effects of the 2029 Earth encounter on asteroid (99942) Apophis' non-principal axis spin state, leveraging refined orbit, spin state, and inertia information provide…

astro-ph.EP2022★ 23 cited

Radio-Loud Exoplanet-Exomoon Survey (RLEES): GMRT Search for Electron Cyclotron Maser Emission

Mayank Narang, Apurva V. Oza, Kaustubh Hakim +3

We conducted the first dedicated search for signatures of exoplanet-exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoo…

astro-ph.EP2022★ 25 cited

A transmission spectrum of the sub-Earth planet L98-59~b in 1.1-1.7 m

Mario Damiano, Renyu Hu, Thomas Barclay +20

With the increasing number of planets discovered by TESS, the atmospheric characterization of small exoplanets is accelerating. L98-59 is a M-dwarf hosting a multi-planet system, a…

astro-ph.EP2022★ 3 cited

A sub-Neptune transiting the young field star HD 18599 at 40 pc

Jerome P. de Leon, John H. Livingston, James S. Jenkins +67

Transiting exoplanets orbiting young nearby stars are ideal laboratories for testing theories of planet formation and evolution. However, to date only a handful of stars with age <…