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19912026
Showing 2024 · astro-ph.EPShow all

29 papers · 2 filters

astro-ph.EP2024★ 19 cited

Transmission spectroscopy of WASP-52 b with JWST NIRISS: Water and helium atmospheric absorption, alongside prominent star-spot crossings

Marylou Fournier-Tondreau, Yanbo Pan, Kim Morel +20

In the era of exoplanet studies with JWST, the transiting, hot gas giant WASP-52 b provides an excellent target for atmospheric characterization through transit spectroscopy. WASP-…

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★ 9 cited

Three Warm Jupiters orbiting TOI-6628, TOI-3837, TOI-5027 and one sub-Saturn orbiting TOI-2328

Marcelo Tala Pinto, Andrés Jordán, Lorena Acuña +35

We report the discovery and characterization of three new transiting giant planets orbiting TOI-6628, TOI-3837 and TOI-5027, and one new warm sub-Saturn orbiting TOI-2328, whose tr…

astro-ph.EP2024

The democratic detrender: Ensemble-Based Removal of the Nuisance Signal in Stellar Time-Series Photometry

Daniel A. Yahalomi, David Kipping, Diana Solano-Oropeza +10

Accurate, precise, and computationally efficient removal of unwanted activity that exists as a combination of periodic, quasi-periodic, and non-periodic systematic trends in time-s…

astro-ph.EP2024★ 4 cited

Stellar Obliquity Excitation via Disk Dispersal-Driven Resonances in Binaries

Yubo Su, Dong Lai

The stellar obliquity of a planetary system is often used to help constrain the system's formation and evolution. One of the mechanisms to reorient the stellar spin involves a secu…

astro-ph.EP2024

The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b

V. A. Boehm, N. K. Lewis, C. E. Fairman +12

Ultraviolet wavelengths offer unique insights into aerosols in exoplanetary atmospheres. However, only a handful of exoplanets have been observed in the ultraviolet to date. Here,…

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★ 11 cited

JWST-TST DREAMS: Non-Uniform Dayside Emission for WASP-17b from MIRI/LRS

Daniel Valentine, Hannah R. Wakeford, Ryan C. Challener +23

We present the first spectroscopic characterisation of the dayside atmosphere of WASP-17b in the mid-infrared using a single JWST MIRI/LRS eclipse observation. From forward-model f…

astro-ph.EP2024★ 3 cited

Outbursts Upon Cooling of Low-Temperature Binary Mixtures: Experiments and Their Planetary Implications

S. M. Raposa, A. E. Engle, S. P. Tan +7

For many binary mixtures, the three-phase solid-liquid-vapor equilibrium curve has intermediate pressures that are higher than the pressure at the two pure triple points. This curv…

astro-ph.EP2024★ 23 cited

BOWIE-ALIGN: JWST reveals hints of planetesimal accretion and complex sulphur chemistry in the atmosphere of the misaligned hot Jupiter WASP-15b

James Kirk, Eva-Maria Ahrer, Alastair B. Claringbold +23

We present a transmission spectrum of the misaligned hot Jupiter WASP-15b from 2.8-5.2 microns observed with JWST's NIRSpec/G395H grating. Our high signal to noise data, which has…

astro-ph.EP2024★ 48 cited

Hints of a sulfur-rich atmosphere around the 1.6 R Super-Earth L98-59 d from JWST NIRSpec G395H transmission spectroscopy

Amélie Gressier, Néstor Espinoza, Natalie H. Allen +11

Detecting atmospheres around planets with a radius below 1.6 R, commonly referred to as rocky planets (Rogers_2015, Rogers_2021), has proven to be challenging. However,…

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★ 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★ 12 cited

The deep oxygen abundance in Solar System Giant Planets, with a new derivation for Saturn

Thibault Cavalié, Jonathan Lunine, Olivier Mousis +1

Deep elemental composition is a challenging measurement to achieve in the giant planets of the solar system. Yet, knowledge of the deep composition offers important insights in the…

astro-ph.EP2024★ 41 cited

A Contact Binary Satellite of the Asteroid (152830) Dinkinesh

Harold F. Levison, Simone Marchi, Keith S. Noll +3

Asteroids with diameters less than about 5 km have complex histories because they are small enough for radiative torques, YORP, to be a notable factor in their evolution. (152830)…

astro-ph.EP2024★ 31 cited

Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum

Everett Schlawin, Sagnick Mukherjee, Kazumasa Ohno +16

WASP-69 b is a hot, inflated, Saturn-mass planet 0.26 Mjup with a zero-albedo equilibrium temperature of 963 K. Here, we report the JWST 2 to 12 um emission spectrum of the planet…

astro-ph.EP2024★ 92 cited

A warm Neptune's methane reveals core mass and vigorous atmospheric mixing

David K. Sing, Zafar Rustamkulov, Daniel P. Thorngren +18

Observations of transiting gas giant exoplanets have revealed a pervasive depletion of methane, which has only recently been identified atmospherically. The depletion is thought to…

astro-ph.EP2024★ 8 cited

Migration of Accreting Planets and Black Holes in Disks

JT Laune, Rixin Li, Dong Lai

Nascent planets are thought to lose angular momentum (AM) to the gaseous protoplanetary disk via gravitational interactions, leading to inward migration. A similar migration proces…

astro-ph.EP2024★ 8 cited

TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system

M. Timmermans, G. Dransfield, M. Gillon +54

Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for at…

astro-ph.EP2024★ 10 cited

Purple is the new green: biopigments and spectra of Earth-like purple worlds

Ligia Fonseca Coelho, Lisa Kaltenegger, Stephen Zinder +3

With more than 5500 detected exoplanets, the search for life is entering a new era. Using life on Earth as our guide, we look beyond green landscapes to expand our ability to detec…

astro-ph.EP2024★ 24 cited

Super-adiabatic Temperature Gradient at Jupiter's Equatorial Zone and Implications for the Water Abundance

Cheng Li, Michael Allison, Sushil Atreya +12

The temperature structure of a giant planet was traditionally thought to be an adiabat assuming convective mixing homogenizes entropy. The only in-situ measurement made by the Gali…

astro-ph.EP2024★ 17 cited

Follow-up LOFAR observations of the Boötis exoplanetary system

Jake D. Turner, Jean-Mathias Grießmeier, Philippe Zarka +2

Context. Observing the radio emission from exoplanets is among the most promising methods to detect their magnetic fields and a measurement of an exoplanetary magnetic field will h…

astro-ph.EP2024★ 17 cited

Free-Floating Planets, Survivor Planets, Captured Planets and Binary Planets from Stellar Flybys

Fangyuan Yu, Dong Lai

In star clusters, close stellar encounters can strongly impact the architecture of a planetary system or even destroy it. We present a systematic study on the effects of stellar fl…