The origin of coronae, stellar wind, and microturbulence in early-type stars

Details The origin of coronae, stellar wind, and microturbulence in early-type stars The origin of coronae, stellar wind, and microturbulence in early-type stars

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pazh....9..360d&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 9, June 1983, p. 190-192) Soviet Astronomy Letters (ISSN 0360-0327), vol. 9, May-June 1

Astronomy and Astrophysics

Astronomy

3

Early Stars, Hot Stars, Magnetohydrodynamic Turbulence, Stellar Atmospheres, Stellar Coronas, Stellar Winds, B Stars, Magnetoacoustic Waves, Meridional Flow, O Stars, Plasma Heating

Scientific paper

The meridional circulation in early-type stars is considered. It is shown that turbulent velocities generated by meridional flows are of the order of 1-10 km/s in A-B-O stars and are in a good agreement with the observed velocities of "microturbulence". Acoustic waves generated by turbulence are the sources of energy to heat coronae. Coronae of O and B stars can emit 1034 erg/s in UV and X-ray and can be hot enough to be the sources of strong stellar wind.

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