Results 61 to 70 of about 1,774 (127)
Chromospheric dust formation, stellar masers and mass loss [PDF]
A multistep scenario which describes a plausible mass loss mechanism associated with red giant and related stars is outlined. The process involves triggering a condensation instability in an extended chromosphere, leading to the formation of cool, dense ...
Stencel, R. E.
core +1 more source
Inhomogeneity in the Local ISM and Its Relation to the Heliosphere. [PDF]
Space Sci Rev, 2022 Linsky J +3 more
europepmc +1 more source
IUE spectra of F and late A stars [PDF]
The International Ultraviolet Explorer (IUE) spectra of alpha CMi (F5 IV-V), beta Cas (F2 IV), alpha Car (F0 Ib), and gamma Boo (A7 III) in the context of the question as to whether chromospheres disappear in the early F late A portions of the ...
Linsky, J. L., Marstad, N. C.
core +1 more source
Non-local thermodynamics equilibrium (LTE) effects in the photosphere; recent research on the chromosphere of the M and C stars; and elementary shock-waves and pulsation theories and their applications to Mira long-period variables are ...
Delareza, Ramiro
core +1 more source
A Signature of Chromospheric Activity in Brown Dwarfs Revealed by 2.5-5.0 Micron AKARI Spectra
, 2014 We propose that the 2.7 micron H_2O, 3.3 micron CH_4 and 4.6 micron CO absorption bands can be good tracers of chromospheric activity in brown dwarfs. In our previous study, we found that there are difficulties in explaining entire spectra between 1.0 ...
Sorahana, Satoko +2 more
core +1 more source
Definition and empirical structure of the range of stellar chromospheres-coronae across the H-R diagram: Cool stars [PDF]
Major advances in our understanding of non-radiative heating and other activity in stars cooler than T sub eff = 10,000K has occured in the last few years.
Linsky, J. L.
core +1 more source
UV chromospheric and circumstellar diagnostic features among F supergiant stars [PDF]
A survey of F supergiant stars to evaluate the extension of chromospheric and circumstellar characteristics commonly observed in the slightly cooler G, K, and M supergiant is discussed.
Giampapa, M. S. +2 more
core +1 more source
The [Fe/H] Dependence on the Ca {\sc ii}-$M_V$ Relationship
, 2012 We examined the Wilson-Bappu effect, a relationship between the absolute magnitude of the star, $M_V$, and the logarithm of the Ca {\sc ii} emission width, $W_0$, over the largest $M_V$ range to date, +13 to -5, covering M-dwarfs to type Ia supergiants ...
Gomez, Thomas +2 more
core +1 more source
The Astrophysical Journal Supplement SeriesAbstract Accurately characterizing the intrinsic stellar photometric noise induced by stellar astrophysics, such as stellar activity, granulation, and oscillations, is of crucial importance for detecting transiting exoplanets. In this study, we investigate the relation between the intrinsic stellar photometric noise, quantified by the ...
Jinghua Zhang +11 more
openaire +3 more sources
Temperature distribution in a stellar atmosphere diagnostic basis [PDF]
A stellar chromosphere is considered a region where the temperature increases outward and where the temperature structure of the gas controls the shape of the spectral lines.
Jefferies, J. T., Morrison, N. D.
core +1 more source