Results 71 to 80 of about 6,508 (165)

On the Measurement of Ocean Acidity With Ambient Sound

Journal of Geophysical Research: Oceans, Volume 130, Issue 10, October 2025.
Abstract The volume‐integrated pH of seawater can be determined from the frequency and depth dependence of wind‐generated ambient noise in the ocean. Over the 1–10 kHz frequency band, three main processes contribute to the acoustic attenuation in seawater: the chemical relaxation of boric acid and magnesium carbonate (<3 kHz, related to pH) and of ...
Ernst M. Uzhansky, David R. Barclay, Michael J. Buckingham   +2 more
wiley   +1 more source

A Disintegrating Rocky World Shrouded in Dust and Gas: Mid-infrared Observations of K2-22 b Using JWST

The Astrophysical Journal Letters
The disintegrating ultrashort period rocky exoplanet K2-22 b periodically emits dusty clouds in a dynamically chaotic process resulting in a variable transit depth from 0% to 1.3%.
Nick Tusay, Jason T. Wright, Thomas G. Beatty, Steve Desch, Knicole Colón, Tushar Mittal, Hugh P. Osborn, Beatriz Campos Estrada, James E. Owen, Jessica Libby-Roberts, Arvind F. Gupta, Brad Foley, Erik Meier Valdés, Daniel J. Stevens, Ashley Herbst   +14 more
doaj   +1 more source

The Effects of Kinematic Magnetohydrodynamics on the Atmospheric Circulation of Eccentric Hot Jupiters

The Astrophysical Journal
Hot Jupiters are typically considered to be tidally locked due to their short orbital periods. The extreme irradiation can result in atmospheric species becoming thermally ionized on the dayside, which then interact with the planet’s magnetic field by ...
Hayley Beltz, Willow Houck, L. C. Mayorga, Thaddeus D. Komacek, Joseph R. Livesey, Juliette Becker   +5 more
doaj   +1 more source

A Large and Variable Leading Tail of Helium in a Hot Saturn Undergoing Runaway Inflation

The Astronomical Journal
Atmospheric escape shapes the fate of exoplanets, with statistical evidence for transformative mass loss imprinted across the mass–radius–insolation distribution.
Michael Gully-Santiago, Caroline V. Morley, Jessica Luna, Morgan MacLeod, Antonija Oklopčić, Aishwarya Ganesh, Quang H. Tran, Zhoujian Zhang, Brendan P. Bowler, William D. Cochran, Daniel M. Krolikowski, Suvrath Mahadevan, Joe P. Ninan, Guđmundur Stefánsson, Andrew Vanderburg, Joseph A. Zalesky, Gregory R. Zeimann   +16 more
doaj   +1 more source

Multiple Patchy Cloud Layers in the Planetary-mass Object SIMP 0136+0933

The Astrophysical Journal
Multiwavelength photometry of brown dwarfs and planetary-mass objects provides insight into their atmospheres and cloud layers. We present near-simultaneous J - and K _s -band multiwavelength observations of the highly variable T2.5 planetary-mass object,
Allison M. McCarthy, Philip S. Muirhead, Patrick Tamburo, Johanna M. Vos, Caroline V. Morley, Jacqueline Faherty, Daniella C. Bardalez Gagliuffi, Eric Agol, Christopher Theissen   +8 more
doaj   +1 more source

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-dependent Variability Driven by Multiple Mechanisms

The Astrophysical Journal Letters
Isolated planetary-mass objects share their mass range with planets but do not orbit a star. They lack the necessary mass to support fusion in their cores and thermally radiate their heat from formation as they cool, primarily at infrared wavelengths ...
Allison M. McCarthy, Johanna M. Vos, Philip S. Muirhead, Beth A. Biller, Caroline V. Morley, Jacqueline Faherty, Ben Burningham, Emily Calamari, Nicolas B. Cowan, Kelle L. Cruz, Eileen Gonzales, Mary Anne Limbach, Pengyu Liu, Evert Nasedkin, Genaro Suárez, Xianyu Tan, Cian O’Toole, Channon Visscher, Niall Whiteford, Yifan Zhou   +19 more
doaj   +1 more source

A Search for Temporal Atmospheric Variability of Kepler Hot Jupiters

The Astronomical Journal
We perform a systematic search for atmospheric variability in short-period gas-giant planets (hot Jupiters) observed by the Kepler mission, by looking for temporal variability of their secondary eclipse depths.
Canis Li, Avi Shporer
doaj   +1 more source

HET/HPF Observations of Helium in Warm, Hot, and Ultrahot Jupiters

The Astronomical Journal
The near-infrared helium triplet line is a powerful tool for studying atmospheric escape processes of close-in exoplanets, especially irradiated gas giants. Line profile fitting provides direct insight into the mechanisms driving atmospheric mass loss of
Jaume Orell-Miquel, Kyra Sampson, Caroline V. Morley, William D. Cochran, Girish M. Duvvuri, Daniel M. Krolikowski, Suvrath Mahadevan, Quang H. Tran   +7 more
doaj   +1 more source

Effects of Transient Stellar Emissions on Planetary Climates of Tidally Locked Exo-Earths

The Astronomical Journal
Space weather events in exoplanetary environments sourced from transient host star emissions, including stellar flares, coronal mass ejections, and stellar proton events, can substantially influence a planet's habitability and atmospheric evolution ...
Howard Chen, Paolo De Luca, Assaf Hochman, Thaddeus D. Komacek   +3 more
doaj   +1 more source

Time-resolved X-ray spectra of Proxima Centauri as seen by XMM-Newton

Astronomy & Astrophysics
Context. Stellar soft X-ray ([1, 100] Å) and extreme ultraviolet (also EUV, [100, 920] Å; jointly, XUV) radiation affect the evolution and chemistry of exoplanet atmospheres. It is, however, uncertain to what extent the radiation’s short-term variability
Damonte A., Pillitteri I., Maggio A., García Muñoz A., Micela G.   +4 more
doaj   +1 more source