Promise and Peril: Stellar Contamination and Strict Limits on the Atmosphere Composition of TRAPPIST-1 c from JWST NIRISS Transmission Spectra [PDF]
The Astrophysical Journal LettersAttempts to probe the atmospheres of rocky planets around M dwarfs present both promise and peril. While their favorable planet-to-star radius ratios enable searches for even thin secondary atmospheres, their high activity levels and high-energy outputs ...
Michael Radica +11 more
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Atmospheric Reconnaissance of TRAPPIST-1 b with JWST/NIRISS: Evidence for Strong Stellar Contamination in the Transmission Spectra [PDF]
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 Stagger-grid: A grid of 3D stellar atmosphere models V. Synthetic stellar spectra and broad-band photometry [PDF]
, 2018 Context. The surface structures and dynamics of cool stars are characterized by the presence of convective motions and turbulent flows which shape the emergent spectrum. Aims. We used realistic three-dimensional radiative hydrodynamical simulations from
A. Chiavassa +6 more
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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.
Dimitar Sasselov
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A Grid of 3D Stellar Atmosphere Models of Solar Metallicity: I. General Properties, Granulation and Atmospheric Expansion [PDF]
, 2013 Present grids of stellar atmosphere models are the workhorses in interpreting stellar observations, and determining their fundamental parameters. These models rely on greatly simplified models of convection, however, lending less predictive power to such
Asplund, Martin +4 more
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The stellar atmosphere simulation code Bifrost [PDF]
, 2011 Context: Numerical simulations of stellar convection and photospheres have been developed to the point where detailed shapes of observed spectral lines can be explained.
Abbett +49 more
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Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program [PDF]
, 1996 We describe the parallel implementation of our generalized stellar atmosphere and NLTE radiative transfer computer program PHOENIX. We discuss the parallel algorithms we have developed for radiative transfer, spectral line opacity, and NLTE opacity and ...
Baron E. +5 more
core +5 more sources
SAtlas: Spherical Versions of the Atlas Stellar Atmosphere Program [PDF]
, 2008 Context: The current stellar atmosphere programs still cannot match some fundamental observations of the brightest stars, and with new techniques, such as optical interferometry, providing new data for these stars, additional development of stellar ...
Avrett +17 more
core +2 more sources
Model Stellar Atmospheres [PDF]
Monthly Notices of the Royal Astronomical Society, 1931 W. H. McCrea
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Feasibility Analysis of Stellar Refraction Indirect Horizon Sensing Positioning on the Carrier inside the Atmosphere [PDF]
Hangkong bingqi, 2022 The stellar refraction indirect horizon sensing positioning method has the characteristics of strong auto-nomy, high accuracy and low cost, which is a new celestial navigation method with great application prospect.
Zhan Xianjun, Wang Xinlong, Hu Xiaodong, Ding Xiaokun
doaj +1 more source