Results 21 to 30 of about 14,314 (230)
The Astrophysical Journal, 2023 The near-infrared transmission spectrum of the warm sub-Neptune exoplanet GJ 1214 b has been observed to be flat and featureless, implying a high metallicity atmosphere with abundant aerosols.
Peter Gao +14 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 We present the first exoplanet phase-curve measurement made with the JWST NIRSpec instrument, highlighting the exceptional stability of this newly commissioned observatory for exoplanet climate studies.
Thomas Mikal-Evans +12 more
doaj +1 more source
Exoplanet Atmospheres and Photochemistry [PDF]
Proceedings of the International Astronomical Union, 2005 Over 150 extrasolar planets are known to orbit sun-like stars. A growing number of them (9 to date) are transiting “hot Jupiters” whose physical characteristics can be measured. Atmospheres of two of these planets have already been detected. We summarize the atmosphere detections and useful upper limits, focusing on the MOST albedo upper limit and II ...
Seager, S. +3 more
openaire +2 more sources
Physics Today, 2013 Twenty years ago planets orbiting faraway stars were the stuff of science fiction. Now their atmospheric composition and even their weather are being revealed by sensitive spectral measurements.
openaire +2 more sources
A Multiple Scattering Polarized Radiative Transfer Model: Application to HD 189733b [PDF]
, 2015 We present a multiple scattering vector radiative transfer model which produces disk integrated, full phase polarized light curves for reflected light from an exoplanetary atmosphere.
Kopparla, Pushkar +5 more
core +2 more sources
Ranges of Atmospheric Mass and Composition of Super Earth Exoplanets [PDF]
, 2008 Terrestrial-like exoplanets may obtain atmospheres from three primary sources: Capture of nebular gases, degassing during accretion, and degassing from subsequent tectonic activity.
Burbine T. H. +5 more
core +1 more source
Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-resolution Data
The Astronomical Journal, 2022 The formation and evolution pathway for the directly imaged multiplanetary system HR 8799 remains mysterious. Accurate constraints on the chemical composition of the planetary atmosphere(s) are key to solving the mystery.
Ji Wang +31 more
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 +58 more
core +2 more sources
The Ultraviolet Radiation Environment Around M dwarf Exoplanet Host Stars [PDF]
, 2012 The spectral and temporal behavior of exoplanet host stars is a critical input to models of the chemistry and evolution of planetary atmospheres. At present, little observational or theoretical basis exists for understanding the ultraviolet spectra of M ...
Bushinsky, Rachel +10 more
core +4 more sources
Exoplanet secondary atmosphere loss and revival [PDF]
Proceedings of the National Academy of Sciences, 2020 SignificanceEarth and Venus have significant atmospheres, but Mercury does not. Thousands of exoplanets are known, but we know almost nothing about rocky exoplanet atmospheres. Many rocky exoplanets were formed by a sub-Neptune-to-super-Earth conversion process during which planets lose most of their H2-rich (primary) atmospheres and are reduced in ...
Edwin S. Kite, Megan N. Barnett
openaire +3 more sources