Results 11 to 20 of about 164 (131)
Annual Review of Astronomy and Astrophysics, 1980 Important progress in our understanding of stellar chromospheres has occurred in the past few years as a result of new observations, developments in spectral line formation theory, and the application of that theory to the construction of detailed model chromospheres.
Linsky Jeffrey L
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Stellar Chromospheric Activity [PDF]
Living Reviews in Solar Physics, 2008 The Sun, stars similar to it, and many rather dissimilar to it, have chromospheres, regions classically viewed as lying above the brilliant photosphere and characterized by a positive temperature gradient and a marked departure from radiative equilibrium.
Hall Jeffrey C.
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Measuring the magnetic fields in the chromospheres of low-mass stars. [PDF]
Nat CommunMagnetic fields in the upper atmospheres of solar-like stars are believed to provide an enormous amount of energy to power the hot coronae and drive large-scale eruptions that could impact the habitability of planetary systems around these stars. However,
Cang T +13 more
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The Influence of Stellar Chromospheres and Coronae on Exoplanet Transmission Spectroscopy
Astrophysical Journal LettersA main source of bias in transmission spectroscopy of exoplanet atmospheres is magnetic activity of the host star in the form of stellar spots, faculae, or flares. However, the fact that main-sequence stars have a chromosphere and a corona and that these
Volker Perdelwitz +3 more
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Stellar Chromospheric Variability [PDF]
Universe, 2021 Cool stars with convective envelopes of spectral types F and later tend to exhibit magnetic activity throughout their atmospheres. The presence of strong and variable magnetic fields is evidenced by photospheric starspots, chromospheric plages and coronal flares, as well as by strong Ca ii H+K and Hα emission, combined with the presence of ultraviolet ...
Richard de Grijs, Devika Kamath
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The Astrophysical Journal Supplement Series, 2022 Stellar parameters and magnetic activity are important for the understanding of stellar physics and dynamo theory. We have used LAMOST spectroscopic surveys to study stellar parameters and magnetic activity properties of TESS objects.
Li-yun Zhang +6 more
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Evidence for Stellar Chromospheres in Globular Clusters [PDF]
Symposium - International Astronomical Union, 1987 We suggest that the conspicuous gaps frequently seen in the color-magnitude diagrams of globular clusters are caused by a sudden increase in chromospheric activity shortly after stars evolve away from the main sequence.
William Liller, Gonzalo Alcaino
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Heating of Stellar Chromospheres by Shock Waves.
Astrophysical Journal, 1960 Ray Weymann
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Modeling Stellar Ca ii H and K Emission Variations: Spot Contribution to the S-index
The Astrophysical Journal Letters, 2023 The S -index is a measure of emission in the Ca ii H and K lines and is a widely used proxy of stellar magnetic activity. It has been assumed until now that the S -index is mainly affected by bright plage regions in the chromosphere.
K. Sowmya +4 more
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Addendum - Detection of Mass Loss in Stellar Chromospheres
Astrophysical Journal, 1980 R E Stencel, Stencel R E
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