Results 71 to 80 of about 1,774 (127)
, 2017 Although observational data unequivocally point out to the presence of chromospheres in red giant stars, no attempts have been made so far to model them using 3D hydrodynamical model atmospheres.
Klevas, Jonas +3 more
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Stellar chromospheric and coronal heating by magnetohydrodynamic waves
The Astrophysical Journal, 1981 An investigation is presented on the way in which the generation of magnetohydrodynamic waves by turbulent motions in stellar convection zones depends on the star's effective temperature, surface gravity, and magnetic field strength. It is shown that the emitted Alfven wave flux (and acoustic slow wave flux in a very strong magnetic field) is in ...
openaire +1 more source
Search for white dwarf companions of cool stars with peculiar element abundances [PDF]
A search for a white dwarf companions of cool stars with peculiar element abundances was undertaken. One additional star the xi Cet, was found with a white dwarf companion.
Boehm-Vitense, E.
core +1 more source
Magnetic reconnection in partially ionized plasmas. [PDF]
Proc Math Phys Eng Sci, 2020 Ni L, Ji H, Murphy NA, Jara-Almonte J.
europepmc +1 more source
High resolution absolute flux profiles of the MC 2 h and k lines in evolved F8 to M5 stars [PDF]
The central results of a survey of the Mg II resonance line emission in a sample of over 50 evolved late type stars, including spectral-luminosity type F8 to M5 and La to IV are presented.
Basri, G. S. +3 more
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87th Annual Meeting of the Meteoritical Society 2025: Abstracts
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley +1 more source
Theoretical studies of the RS cannum venaticorum stars [PDF]
Four areas of research were investigated: chromospheric modelling; starspot modelling; supersonic transition locus (STL) crossing; and STL crossing and T Tauri phenomena. Relationships among these areas of research are presented.
Mullan, D. J.
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M dwarfs: Theoretical work [PDF]
Theoretical work on the atmospheres of M dwarfs has progressed along lines parallel to those followed in the study of other classes of stars. Such models have become increasingly sophisticated as improvements in opacities, in the equation of state, and ...
Mullan, Dermott J.
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Theoretical studies of chromospheres and winds in cool stars [PDF]
Calculated radiative losses from H, H-, Ca II, and Mg II show that cooling for the chromosphere of the supergiant epsilon Gem do not differ greatly from the solar law, although there are differences at approximately 6000K due to ionization effects.
Dupree, A. K.
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On the physics of waves in the solar atmosphere: Wave heating and wind acceleration [PDF]
In the area of solar physics, new calculations of the acoustic wave energy fluxes generated in the solar convective zone was performed. The original theory developed was corrected by including a new frequency factor describing temporal variations of the ...
Musielak, Z. E.
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