Results 41 to 50 of about 646 (121)

A Panchromatic Characterization of the Evening and Morning Atmosphere of WASP-107 b: Composition and Cloud Variations, and Insight into the Effect of Stellar Contamination

The Astronomical Journal
Limb-resolved transmission spectroscopy has the potential to transform our understanding of exoplanetary atmospheres. By separately measuring the transmission spectra of the evening and morning limbs, these atmospheric regions can be individually ...
Matthew M. Murphy, Thomas G. Beatty, Everett Schlawin, Taylor J. Bell, Michael Radica, Thomas D. Kennedy, Nishil Mehta, Luis Welbanks, Michael R. Line, Vivien Parmentier, Thomas P. Greene, Sagnick Mukherjee, Jonathan J. Fortney, Kazumasa Ohno, Lindsey Wiser, Anastasia Triantafillides, Emily Rauscher, Isaac R. Edelman, Marcia J. Rieke   +18 more
doaj   +1 more source

The influence of galactic cosmic rays on ion-neutral hydrocarbon chemistry in the upper atmospheres of free-floating exoplanets

, 2014
The authors highlight financial support of the European Community under the FP7 by an ERC starting grant.Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry.
P. B. Rimmer, C. Bilger, Rimmer, P.B., Helling, C., Bilger, C., Ch. Helling   +5 more
core   +1 more source

Impact of oxygen fugacity on the atmospheric structure and emission spectra of ultra-hot rocky exoplanets

Astronomy & Astrophysics
Context. Atmospheres above lava-ocean planets (LOPs) hold clues related to the properties of their interiors, based on the expectation that the two reservoirs are in chemical equilibrium. Furthermore, such atmospheres are observable with current-generation space- and ground-based telescopes.
Fabian L. Seidler, Paolo A. Sossi, Simon L. Grimm   +2 more
openaire   +3 more sources

A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum

The Astrophysical Journal Letters
GJ 1214b is the archetype sub-Neptune for which thick aerosols have prevented us from constraining its atmospheric properties for over a decade. In this study, we leverage the panchromatic transmission spectrum of GJ 1214b established by the Hubble Space
Kazumasa Ohno, Everett Schlawin, Taylor J. Bell, Matthew M. Murphy, Thomas G. Beatty, Luis Welbanks, Thomas P. Greene, Jonathan J. Fortney, Vivien Parmentier, Isaac R. Edelman, Nishil Mehta, Marcia J. Rieke   +11 more
doaj   +1 more source

The Exoplanet Climate Infrared TElescope (EXCITE) [PDF]

, 2018
Although there are a large number of known exoplanets, there is little data on their global atmospheric properties. Phase-resolved spectroscopy of transiting planets - continuous spectroscopic observation of planets during their full orbits - probes ...
Vivien Parmentier, Enzo Pascale, Lewis, N, Parmentier, V, Nagler, P, Brian Kilpatrick, Kilpatrick, B, Scowen, P, Wen, Y, Nathaniel Butler, Ingo Waldmann, Waldmanni, Ingo, Calvin B. Netterfield, Nikole Lewis, Paul Scowen, Maxted, PFL, Netterfield, C. B., Korotkov, Andrei, Pierre F. L. Maxted, Pascale, E, Wen, Yiting, Lewis, Nikole, Parmentier, Vivien, Laddawan Miko, Pascale, Enzo, Peter Nagler, Jennifer Patience, Scowen, Paul, Butler, Nathaniel, Patience, J, Waldmann, I, Gregory S. Tucker, Butler, N, Tucker, Gregory S., Netterfield, CB, Maxted, Pierre F. L., Tucker, GS, Nagler, Peter, Patience, Jennifer, Miko, L, Kilpatrick, Brian, Andrei Korotkov, Korotkov, A, Yiting Wen, Miko, Laddawan   +44 more
core   +3 more sources

Up, Up, and Away: Winds and Dynamical Structure as a Function of Altitude in the Ultrahot Jupiter WASP-76b

The Astrophysical Journal
Due to the unprecedented signal strengths offered by the newest high-resolution spectrographs on 10 m class telescopes, exploring the 3D nature of exoplanets is possible with an unprecedented level of precision.
Aurora Y. Kesseli, Hayley Beltz, Emily Rauscher, I. A. G. Snellen   +3 more
doaj   +1 more source

Bayesian Deep Learning for Exoplanet Atmospheric Retrieval [PDF]

, 2018
Over the past decade, the study of extrasolar planets has evolved rapidly from plain detection and identification to comprehensive categorization and characterization of exoplanet systems and their atmospheres. Atmospheric retrieval, the inverse modeling
O'Beirne, Molly D., Mascaro, Massimo, Arney, Giada N., Baydin, Atilim Gunes, Angerhausen, Daniel, Domagal-Goldman, Shawn D., Gal, Yarin, Zorzan, Simone, Soboczenski, Frank, Himes, Michael D., Cobb, Adam D.   +10 more
core  

JWST Transmission Spectroscopy of HD 209458b: A Supersolar Metallicity, a Very Low C/O, and No Evidence of CH4, HCN, or C2H2

The Astrophysical Journal Letters
We present the transmission spectrum of the original transiting hot Jupiter HD 209458b from 2.3 to 5.1 μ m as observed with the NIRCam instrument on the James Webb Space Telescope (JWST). Previous studies of HD 209458b’s atmosphere have given conflicting
Qiao Xue, Jacob L. Bean, Michael Zhang, Luis Welbanks, Jonathan Lunine, Prune August   +5 more
doaj   +1 more source

Surrogate-accelerated Bayesian Inversion for Exoplanet Interior Characterization

The Astrophysical Journal
Characterizing the interior structure of exoplanets is an inverse problem often solved using Bayesian inference, but this approach is hampered by the high computational cost of planetary structure models.
Tijn de Wringer, Caroline Dorn, Emily O. Garvin, Stefano Marelli   +3 more
doaj   +1 more source

The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultrahot Jupiter WASP-18 b

The Astronomical Journal, 2023
We present high-resolution dayside thermal emission observations of the exoplanet WASP-18 b using IGRINS on Gemini South. We remove stellar and telluric signatures using standard algorithms, and we extract the planet signal via cross-correlation with ...
Matteo Brogi, Vanessa Emeka-Okafor, Michael R. Line, Siddharth Gandhi, Lorenzo Pino, Eliza M.-R. Kempton, Emily Rauscher, Vivien Parmentier, Jacob L. Bean, Gregory N. Mace, Nicolas B. Cowan, Evgenya Shkolnik, Joost P. Wardenier, Megan Mansfield, Luis Welbanks, Peter Smith, Jonathan J. Fortney, Jayne L. Birkby, Joseph A. Zalesky, Lisa Dang, Jennifer Patience, Jean-Michel Désert   +21 more
doaj   +1 more source