Results 101 to 110 of about 6,517 (174)

The Polar Vortex Hypothesis: Evolving, Spectrally Distinct Polar Regions Explain Short- and Long-term Light-curve Evolution and Color–Inclination Trends in Brown Dwarfs and Giant Exoplanets

The Astrophysical Journal Letters
Recent studies revealed viewing-angle-dependent color and spectral trends in brown dwarfs, as well as long-term photometric variability (∼100 hr). The origins of these trends are yet unexplained.
Nguyen Fuda, Dániel Apai
doaj   +1 more source

Planetary Habitability Under the Light of a Rapidly Changing Star

The Astronomical Journal
Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates. In this work, we evaluate how stellar variability influences the equilibrium
Tara Fetherolf, Sadie G. Welter, Colby M. Ostberg, Stephen R. Kane, Rory Barnes, Emilie R. Simpson   +5 more
doaj   +1 more source

Pursuing Truth: Improving Retrievals on Mid-infrared Exo-Earth Spectra with Physically Motivated Water Abundance Profiles and Cloud Models

The Astrophysical Journal
Atmospheric retrievals are widely used to constrain exoplanet properties from observed spectra. We investigate how the common nonphysical retrieval assumptions of vertically constant molecule abundances and cloud-free atmospheres affect our ...
Björn S. Konrad, Sascha P. Quanz, Eleonora Alei, Robin Wordsworth   +3 more
doaj   +1 more source

Fully fluorinated non-carbon compounds NF₃ and SF₆ as ideal technosignature gases. [PDF]

Sci Rep, 2023
Seager S, Petkowski JJ, Huang J, Zhan Z, Ravela S, Bains W.   +5 more
europepmc   +1 more source

Earth-like Exoplanets in Spin–Orbit Resonances: Climate Dynamics, 3D Atmospheric Chemistry, and Observational Signatures

The Planetary Science Journal
Terrestrial exoplanets around M- and K-type stars are important targets for atmospheric characterization. Such planets are likely tidally locked with the order of spin–orbit resonances (SORs) depending on eccentricity. We explore the impact of SORs on 3D
Marrick Braam, Paul I. Palmer, Leen Decin, Nathan J. Mayne, James Manners, Sarah Rugheimer   +5 more
doaj   +1 more source

Analogous response of temperate terrestrial exoplanets and Earth's climate dynamics to greenhouse gas supplement. [PDF]

Sci Rep, 2023
Hochman A, Komacek TD, De Luca P.
europepmc   +1 more source

Hot Rocks Survey. V. Secondary Eclipse Photometry of GJ 3473 b with JWST/MIRI

The Astronomical Journal
JWST is transforming our ability to characterize small exoplanets, from sub-Neptunes to rocky worlds. A key open question is whether highly irradiated rocky planets can retain atmospheres or are stripped bare by stellar irradiation—a boundary that ...
Måns Holmberg, Hannah Diamond-Lowe, João M. Mendonça, Daniel Kitzmann, Néstor Espinoza, Natalie H. Allen, Prune C. August, Mark Fortune, Amélie Gressier, Jegug Ih, Erik Meier Valdés, Merlin Zgraggen, Lars A. Buchhave, Brice-Olivier Demory, Chloe Fisher, Neale P. Gibson, Kevin Heng, Bibiana Prinoth, Adam J. Burgasser   +18 more
doaj   +1 more source

Revealing the atmospheres of highly irradiated exoplanets: from ultra-hot Jupiters to rocky worlds. [PDF]

Astrophys Space Sci, 2023
Mansfield M.
europepmc   +1 more source

Photochemically produced SO₂ in the atmosphere of WASP-39b. [PDF]

Nature, 2023
Tsai SM, Lee EKH, Powell D, Gao P, Zhang X, Moses J, Hébrard E, Venot O, Parmentier V, Jordan S, Hu R, Alam MK, Alderson L, Batalha NM, Bean JL, Benneke B, Bierson CJ, Brady RP, Carone L, Carter AL, Chubb KL, Inglis J, Leconte J, Line M, López-Morales M, Miguel Y, Molaverdikhani K, Rustamkulov Z, Sing DK, Stevenson KB, Wakeford HR, Yang J, Aggarwal K, Baeyens R, Barat S, de Val-Borro M, Daylan T, Fortney JJ, France K, Goyal JM, Grant D, Kirk J, Kreidberg L, Louca A, Moran SE, Mukherjee S, Nasedkin E, Ohno K, Rackham BV, Redfield S, Taylor J, Tremblin P, Visscher C, Wallack NL, Welbanks L, Youngblood A, Ahrer EM, Batalha NE, Behr P, Berta-Thompson ZK, Blecic J, Casewell SL, Crossfield IJM, Crouzet N, Cubillos PE, Decin L, Désert JM, Feinstein AD, Gibson NP, Harrington J, Heng K, Henning T, Kempton EM, Krick J, Lagage PO, Lendl M, Lothringer JD, Mansfield M, Mayne NJ, Mikal-Evans T, Palle E, Schlawin E, Shorttle O, Wheatley PJ, Yurchenko SN.   +84 more
europepmc   +1 more source

No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c. [PDF]

Nature, 2023
Zieba S, Kreidberg L, Ducrot E, Gillon M, Morley C, Schaefer L, Tamburo P, Koll DDB, Lyu X, Acuña L, Agol E, Iyer AR, Hu R, Lincowski AP, Meadows VS, Selsis F, Bolmont E, Mandell AM, Suissa G.   +18 more
europepmc   +1 more source