Results 21 to 30 of about 8,850 (191)

Spectral Retrieval with JWST Photometric data: a Case Study for HIP 65426 b

The Astronomical Journal, 2023
Half of the JWST high-contrast imaging objects will only have photometric data as of Cycle 2. However, to better understand their atmospheric chemistry that informs formation origin, spectroscopic data are preferred.
Ji Wang
doaj   +1 more source

Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity [PDF]

, 2010
First generation optical coronagraphic telescopes will obtain images of cool gas and ice giant exoplanets around nearby stars. The albedo spectra of exoplanets at planet-star separations larger than about 1 AU are dominated by reflected light to beyond 1
Ackerman, Alibert, Beichman, Boss, Brown, Burrows, Burrows, Burrows, Chapman, Chapman, Conrath, Dlugach, Dodson-Robinson, Dyudina, Fortney, Fortney, Fortney, Fortney, Fortney, Fortney, Freedman, Gautier, Gautier, Guillot, Guillot, Guyon, Ida, Jonathan J. Fortney, Kasdin, Kerri L. Cahoy, Kratter, Kuchner, Lafreniere, Liou, Lodders, Lodders, Lodders, Mark S. Marley, Marley, Marley, Marley, Marley, Marois, Mawet, Mihilas, Rauscher, Saumon, Saumon, Seager, Sobolev, Spiegel, Stephens, Sudarsky, Sudarsky, Sudarsky, Traub, Veras, West, Zahnle   +58 more
core   +2 more sources

A better characterization of the chemical composition of exoplanets atmospheres with ARIEL [PDF]

Experimental Astronomy, 2018
Since the discovery of the first extrasolar planet more than twenty years ago, we have discovered nearly four thousand planets orbiting stars other than the Sun. Current observational instruments (on board the Hubble Space Telescope, Spitzer, and on ground-based facilities) have allowed the scientific community to obtain important information on the ...
Venot, Olivia, Drummond, Benjamin, Miguel, Yamila, Waldmann, Ingo, Pascale, Enzo, Zingales, Tiziano   +5 more
openaire   +5 more sources

Theoretical Spectra of Terrestrial Exoplanet Surfaces [PDF]

, 2012
We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in ...
Batalha, Best, Bethany L. Ehlmann, Borucki, Borucki, Cheek, Clark, Clark, Cochran, Cowan, de Pater, Drilling, Farmer, Gautier, Koch, Miller-Ricci, Muirhead, Pieters, Pieters, RELAB Spectral Database, Renyu Hu, Rogers, Salisbury, Sara Seager, Seager, Seager, Sobolev, Sprague, Winn   +28 more
core   +2 more sources

A Radiative-convective Model for Terrestrial Planets with Self-consistent Patchy Clouds

The Planetary Science Journal, 2023
Clouds are ubiquitous: they arise for every solar system planet that possesses an atmosphere and have also been suggested as a leading mechanism for obscuring spectral features in exoplanet observations.
James D. Windsor, Tyler D. Robinson, Ravi kumar Kopparapu, Amber V. Young, David E. Trilling, Joe LLama   +5 more
doaj   +1 more source

The ARCiS framework for Exoplanet Atmospheres: The Cloud Transport Model [PDF]

, 2019
Understanding of clouds is instrumental in interpreting current and future spectroscopic observations of exoplanets. Modelling clouds consistently is complex, since it involves many facets of chemistry, nucleation theory, condensation physics ...
Min, Michiel, Ormel, Chris W.
core   +2 more sources

SPECULOOS exoplanet search and its prototype on TRAPPIST [PDF]

, 2017
One of the most significant goals of modern science is establishing whether life exists around other suns. The most direct path towards its achievement is the detection and atmospheric characterization of terrestrial exoplanets with potentially habitable
A Burrows, A Collier Cameron, A Wolszczan, Adam J. Burgasser, AR Belu, B Goldman, C Hayashi, C Terquem, CH Blake, CP Johnstone, D Deming, D Kubas, E Agol, E Berger, E Bolmont, E Bolmont, E Jehin, EE Mamajek, ET Whelan, Eunkyu Han, GÁ Bakos, IN Reid, IN Reid, J Leconte, J Muzerolle, J Wit de, J Wit de, J. Schneider, JCB Papaloizou, JD Kirkpatrick, JD Kirkpatrick, JE Gizis, JE Owen, JE Owen, JK Barstow, JN Winn, JS Pineda, KL Luhman, KL Luhman, KL Luhman, L Kaltenegger, L Ricci, L Zeng, M Gillon, M Gillon, M Gillon, M Gillon, M Jura, M Mayor, MC Cushing, MJ Holman, MJ Payne, MY He, P Cresswell, P. Figueira, Philip S. Muirhead, PJ Wheatley, PS Muirhead, R Klein, R Luger, R Luger, R Montgomery, RK Kopparapu, RL Akeson, S Ballard, S Jin, S Seager, S Seager, Sergio B. Dieterich, SJ Schmidt, SN Raymond, SS Kumar, SS Kumar, Stanimir A. Metchev, V Bourrier, X Bonfils, Y Alibert, Y Shvartzvald, ZK Berta   +78 more
core   +1 more source

Hubble Space Telescope Transmission Spectroscopy for the Temperate Sub-Neptune TOI-270 d: A Possible Hydrogen-rich Atmosphere Containing Water Vapor

The Astronomical Journal, 2023
TOI-270 d is a temperate sub-Neptune discovered by the Transiting Exoplanet Survey Satellite (TESS) around a bright ( J = 9.1 mag) M3V host star. With an approximate radius of 2 R _⊕ and equilibrium temperature of 350 K, TOI-270 d is one of the most ...
Thomas Mikal-Evans, Nikku Madhusudhan, Jason Dittmann, Maximilian N. Günther, Luis Welbanks, Vincent Van Eylen, Ian J. M. Crossfield, Tansu Daylan, Laura Kreidberg   +8 more
doaj   +1 more source

Jupiter as an exoplanet: UV to NIR transmission spectrum reveals hazes, a Na layer and possibly stratospheric H2O-ice clouds [PDF]

, 2015
Currently, the analysis of transmission spectra is the most successful technique to probe the chemical composition of exoplanet atmospheres. But the accuracy of these measurements is constrained by observational limitations and the diversity of possible ...
Garcia-Melendo, E., Gonzalez-Merino, B, Lopez-Puertas, M., Montañes-Rodriguez, P., Palle, E.   +4 more
core   +3 more sources

Constraining the Thickness of TRAPPIST-1 b’s Atmosphere from Its JWST Secondary Eclipse Observation at 15 μm

The Astrophysical Journal Letters, 2023
Recently, the first JWST measurement of thermal emission from a rocky exoplanet was reported. The inferred dayside brightness temperature of TRAPPIST-1 b at 15 μ m is consistent with the planet having no atmosphere and therefore no mechanism by which to ...
Jegug Ih, Eliza M.-R. Kempton, Emily A. Whittaker, Madeline Lessard   +3 more
doaj   +1 more source