Results 11 to 20 of about 4,175 (313)
The Astrophysical Journal Letters, 2023 TRAPPIST-1 is a nearby system of seven Earth-sized, temperate, rocky exoplanets transiting a Jupiter-sized M8.5V star, ideally suited for in-depth atmospheric studies.
Olivia Lim +24 more
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The Astrophysical Journal, 2023 We present the first isotopic abundances of both ^13 CO and C ^18 O in solar twin stars and test the results against several galactic chemical evolution (GCE) models with different nucleosynthesis prescriptions.
David R. Coria +5 more
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Overstable Convective Modes in a Polytropic Stellar Atmosphere
The Astrophysical Journal, 2023 Within the convection zone of a rotating star, the presence of the Coriolis force stabilizes long-wavelength convective modes. These modes, which would have been unstable if the star lacked rotation, are called overstable convective modes or thermal ...
Bradley W. Hindman, Rekha Jain
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Stratospheric temperature measurements from nanosatellite stellar occultation observations of refractive bending [PDF]
Atmospheric Measurement Techniques, 2023 Stellar occultation observations from space can probe the stratosphere and mesosphere at a fine vertical scale around the globe. Unlike other measurement techniques like radiosondes and aircraft, stellar occultation has the potential to observe the ...
D. L. McGuffin +8 more
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NASA Global Daily Downscaled Projections, CMIP6
Scientific Data, 2022 Measurement(s) temperature of air • volume of hydrological precipitation • humidity • stellar radiation • atmospheric wind speed Technology Type(s) statistical downscaling Sample Characteristic - Environment ...
Bridget Thrasher +5 more
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Opacities and Atomic Diffusion
Galaxies, 2023 Opacity is a fundamental quantity for stellar modeling, and it plays an essential role throughout the life of stars. After gravity drives the collapse of interstellar matter into a protostar, the opacity determines how this matter is structured around ...
Georges Alecian, Morgan Deal
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Pulsating Stellar Atmospheres [PDF]
Symposium - International Astronomical Union, 1997 We review the basic concepts, present state of theoretical models, and the future prospects for theory and observations of pulsating stellar atmospheres. Our emphasis is on radially pulsating cool stars, which dynamic atmospheres provide a general example for the differences with standard static model atmospheres.
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CALIBRATION OF STELLAR PARAMETERS OF 85 PEG SYSTEM [PDF]
Journal of Astronomy and Space Sciences, 2007 We have investigated the evolutionary status of 85 Peg within the framework of standard evolutionary theory. 85 Peg has been known to be a visual and spectroscopic binary system in the solar neighborhood. In spite of the accurate information of the total
Kiehunn Bach +2 more
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Odessa Astronomical Publications, 2013 Spectroscopic binaries remain a laboratory for testing the stellar atmosphere and the stellar evolution theories. It’s considering problems determination of parameters of components and their errous for example two spectroscopic binaries with the main ...
L. V. Glazunova
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The classical stellar atmosphere problem
Journal of Computational and Applied Mathematics, 1999 accepted for publication in The Journal of Computational and Applied Mathematics, Computational Astrophysics, eds. H.
Klaus Werner, Stefan Dreizler
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