output
19912026
Showing 2024 · astro-ph.EPShow all

53 papers · 2 filters

astro-ph.EP2024★ 15 cited

Two Distinct Populations of Dark Comets Delineated by Orbits and Sizes

Darryl Z. Seligman, Davide Farnocchia, Marco Micheli +7

Small bodies are capable of delivering essential prerequisites for the development of life, such as volatiles and organics, to the terrestrial planets. For example, empirical evide…

astro-ph.EP2024★ 2 cited

A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity

Abigail A. Tumborang, Jessica J. Spake, Heather A. Knutson +7

We present a detailed reanalysis of the atmospheric properties of WASP-19b, an ultra-hot Jupiter (1.14 M Jup, 1.41 R Jup) orbiting an active Sun-like star every 0.79 day. We reanal…

astro-ph.EP2024★ 4 cited

Reflected-light Phase Curves with PICASO: A Kepler-7b Case Study

Colin D. Hamill, Alexandria V. Johnson, Natasha Batalha +4

Examining reflected light from exoplanets aids in our understanding of the scattering properties of their atmospheres and will be a primary task of future flagship space- and groun…

astro-ph.EP2024

Water vapor as a probe of the origin of gas in debris disks

Yasuhiro Hasegawa, Riouhei Nakatani, Isabel Rebollido +5

Debris disks embrace the formation and evolution histories of planetary systems. Recent detections of gas in these disks have received considerable attention, as its origin ties up…

astro-ph.EP2024★ 2 cited

Deep Search for a scattered light dust halo around Vega with the Hubble Space Telescope

Schuyler G. Wolff, András Gáspár, George H. Rieke +6

We present a provisory scattered light detection of the Vega debris disk using deep Hubble Space Telescope coronagraphy (PID 16666). At only 7.7 parsecs, Vega is immensely importan…

astro-ph.EP2024★ 6 cited

The Polar Stratosphere of Jupiter

Vincent Hue, Thibault Cavalié, James A. Sinclair +13

Observations of the Jovian upper atmosphere at high latitudes in the UV, IR and mm/sub-mm all indicate that the chemical distributions and thermal structure are broadly influenced…

astro-ph.EP2024

Low-resolution Transit Spectroscopy of Three Hot Jupiters Using the 2m Himalayan Chandra Telescope

Athira Unni, Thirupathi Sivarani, Jayesh Goyal +3

Here, we present the low-resolution transmission spectroscopy of three giant planets using the Himalayan Faint Object Spectrograph Camera (HFOSC) on the 2m Himalayan Chandra Telesc…

astro-ph.EP2024★ 10 cited

HWO Yield Sensitivities in the NIR and NUV

Rhonda Morgan, Dmitry Savransky, Michael Turmon +6

Habitable Worlds Observatory (HWO) will search for biosignatures from Earth-size exoplanets in the habitable zones of nearby stars. The wavelength range for biosignatures used by t…

astro-ph.EP2024★ 6 cited

The Thermal Structure and Composition of Jupiter's Great Red Spot From JWST/MIRI

Jake Harkett, Leigh N. Fletcher, Oliver R. T. King +15

Jupiter's Great Red Spot (GRS) was mapped by the James Webb Space Telescope (JWST)/Mid-Infrared Instrument (4.9-27.9 micron) in July and August 2022. These observations took place…

astro-ph.EP2024

New Moons of Uranus and Neptune from Ultra-Deep Pencil Beam Surveys

Scott Sheppard, David Tholen, Marina Brozovic +4

We have conducted extremely ultra-deep pencil beam observations for new satellites around both Uranus and Neptune. Tens of images on several different nights in 2021, 2022 and 2023…

astro-ph.EP2024★ 20 cited

Planet Mass and Metallicity: The Exoplanets and Solar System Connection

Mark R. Swain, Yasuhiro Hasegawa, Daniel P. Thorngren +1

Theoretical studies of giant planet formation suggest that substantial quantities of metals - elements heavier than hydrogen and helium - can be delivered by solid accretion during…

astro-ph.EP2024★ 11 cited

A patchy CO exosphere on Ganymede revealed by the James Webb Space Telescope

Dominique Bockelée-Morvan, Olivier Poch, Françcois Leblanc +25

Jupiter's icy moon Ganymede has a tenuous exosphere produced by sputtering and possibly sublimation of water ice. To date, only atomic hydrogen and oxygen have been directly detect…

astro-ph.EP2024★ 23 cited

Chemical composition of comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF) from radio spectroscopy and the abundance of HCOOH and HNCO in comets

N. Biver, D. Bockelee-Morvan, B. Handzlik +14

We present the results of a molecular survey of long period comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF). Comet C/2021 A1 was observed with the IRAM 30-m radio telescope in Novem…

astro-ph.EP2024★ 6 cited

Fringing analysis and forward modeling of Keck Planet Imager and Characterizer (KPIC) spectra

Katelyn A. Horstman, Jean-Baptiste Ruffio, Jason J. Wang +27

The Keck Planet Imager and Characterizer (KPIC) combines high contrast imaging with high resolution spectroscopy (R~35,000 in K band) to study directly imaged exoplanets and brown…

astro-ph.EP2024★ 5 cited

Debiasing astro-Photometric Observations with Corrections Using Statistics (DePhOCUS)

Tobias Hoffmann, Marco Micheli, Juan Luis Cano +5

Photometric measurements allow the determination of an asteroid's absolute magnitude, which often represents the sole means to infer its size. Photometric observations can be obtai…

astro-ph.EP2024★ 15 cited

Atmospheric characterization of the super-Jupiter HIP 99770 b with KPIC

Yapeng Zhang, Jerry W. Xuan, Dimitri Mawet +28

Young, self-luminous super-Jovian companions discovered by direct imaging provide a challenging test of planet formation and evolution theories. By spectroscopically characterizing…

astro-ph.EP2024★ 62 cited

A Benchmark JWST Near-Infrared Spectrum for the Exoplanet WASP-39b

A. L. Carter, E. M. May, N. Espinoza +77

Observing exoplanets through transmission spectroscopy supplies detailed information on their atmospheric composition, physics, and chemistry. Prior to JWST, these observations wer…

astro-ph.EP2024★ 38 cited

JWST reveals a rapid and strong day side variability of 55 Cancri e

J. A. Patel, A. Brandeker, D. Kitzmann +16

The nature of the close-in rocky planet 55 Cnc e is puzzling despite having been observed extensively. Its optical and infrared occultation depths show temporal variability, in add…

astro-ph.EP2024★ 23 cited

A JWST/MIRI analysis of the ice distribution and PAH emission in the protoplanetary disk HH 48 NE

J. A. Sturm, M. K. McClure, D. Harsono +18

Ice-coated dust grains provide the main reservoir of volatiles that play an important role in planet formation processes and may become incorporated into planetary atmospheres. How…

astro-ph.EP2024★ 96 cited

Sulphur dioxide in the mid-infrared transmission spectrum of WASP-39b

Diana Powell, Adina D. Feinstein, Elspeth K. H. Lee +70

The recent inference of sulphur dioxide (SO) in the atmosphere of the hot (1100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST observations suggests that phot…

astro-ph.EP2024★ 15 cited

Evidence for auroral influence on Jupiter's nitrogen and oxygen chemistry revealed by ALMA

Thibault Cavalié, Ladislav Rezac, Raphael Moreno +10

The localized delivery of new long-lived species to Jupiter's stratosphere by comet Shoemaker-Levy 9 in 1994 opened a window to constrain Jovian chemistry and dynamics by monitorin…

astro-ph.EP2024★ 37 cited

Geophysical Observations of the 24 September 2023 OSIRIS-REx Sample Return Capsule Re-Entry

Elizabeth A. Silber, Daniel C. Bowman, Chris G. Carr +79

Sample Return Capsules (SRCs) entering Earth's atmosphere at hypervelocity from interplanetary space are a valuable resource for studying meteor phenomena. The 24 September 2023 ar…

astro-ph.EP2024★ 14 cited

Temperature and composition disturbances in the southern auroral region of Jupiter revealed by JWST/MIRI

Pablo Rodríguez-Ovalle, Thierry Fouchet, Sandrine Guerlet +17

Jupiters south polar region was observed by JWST Mid Infrared Instrument in December 2022. We used the Medium Resolution Spectrometer mode to provide new information about Jupiters…

astro-ph.EP2024★ 1 cited

The Pictoris b Hill sphere transit campaign. Paper II: Searching for the signatures of the Pictoris exoplanets through time delay analysis of the Scuti pulsations

Sebastian Zieba, Konstanze Zwintz, Matthew Kenworthy +34

The Pictoris system is the closest known stellar system with directly detected gas giant planets, an edge-on circumstellar disc, and evidence of falling sublimating bodies and…