Röntgenstrahlung from Herbig Ae/Be stars.

Details Röntgenstrahlung from Herbig Ae/Be stars. Röntgenstrahlung from Herbig Ae/Be stars.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc...17p&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 17 - 20

Astronomy and Astrophysics

Astrophysics

9

Herbig Ae-Be Stars: X Rays, Herbig Ae-Be Stars: Stellar Winds

Scientific paper

Herbig Ae/Be stars are young, pre-main-sequence stars of intermediate mass (2-8 Msun). They are the more massive analogs to T Tauri stars, but unlike T Tauri stars they are not believed to be convective, convection being a pre-requisite for sustaining magnetic activity, necessary for coronal heating and thus X-ray emission. The authors present ROSAT observations of 30 Ae/Be stars, about half of which were detected as X-ray sources with rather high X-ray luminosities up to 1032erg/s. The X-ray spectra and hardness ratios indicate plasma temperatures of 107K, typical for coronal emission. The high detection rate of X-ray emission from Ae/Be stars is surprising, if the above reasoning is correct. The authors discuss several possibilities for the origin of the X-ray emission: shock interaction of the Ae/Be star stellar wind with remnant circumstellar matter, coronal emission caused by a shear dynamo, and unresolved T Tauri companions.

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