X-ray emission from Herbig Ae/Be stars: A ROSAT survey

Details X-ray emission from Herbig Ae/Be stars: A ROSAT survey X-ray emission from Herbig Ae/Be stars: A ROSAT survey

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..152z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 1, p. 152-164

Astronomy and Astrophysics

Astronomy

117

A Stars, B Stars, Emission Spectra, Pre-Main Sequence Stars, X Ray Astronomy, X Ray Stars, X Rays, Correlation, Rosat Mission, Satellite Imagery, Spaceborne Astronomy, Stellar Coronas, Stellar Luminosity, Stellar Rotation, Stellar Winds, X Ray Spectra

Scientific paper

We have observed 14 Herbig Ae/Be stars in X-rays with the ROSAT Position Sensitive Proportional Counter (PSPC) (0.1-2.4 keV). In addition, we obtained data from the ROSAT archive for 7 Herbig Ae/Be stars. As a result, 11 of the 21 Herbig Ae/Be stars studied here have been detected as X-ray sources, among them AB Aur, HR 5999/6000, and Z CMa. We have investigated possible correlations between the X-ray luminosity and other stellar parameters like Lbol, spectral type, stellar rotation and winds. We suspect that the origin of the X-ray emission is likely to be related to the stellar wind, although other explanations (e.g. unresolved T Tauri companions) are also discussed. Some Ae/Be stars are known to be the exciting sources of high-velocity jets, but none of the jets themselves were detected in X-rays. In several cases, the X-ray images revealed a small cluster of sources, presumably lower mass pre-main-sequence objects that surround the more massive Ae/Be stars.

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