ROSAT detections of X-ray emission from young B-type stars

Details ROSAT detections of X-ray emission from young B-type stars ROSAT detections of X-ray emission from young B-type stars

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402l..13s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 402, no. 1, p. L13-L16.

Astronomy and Astrophysics

Astronomy

54

B Stars, Emission Spectra, Rosat Mission, X Ray Spectra, Globular Clusters, Spaceborne Astronomy, Stellar Coronas, Stellar Magnetic Fields

Scientific paper

We present first results of a series of pointings of the Rosat HRI at visual binaries consisting of a B-star with a later-type companion. The binaries selected for this study are very likely physical pairs. Dating of the B-type stars with respect to the zero-age main sequence, as well as spectroscopic observations of the late-type stars, provides evidence for the extreme youth of these systems with ages typically near or below 10 exp 8 yr. Surprisingly, the late-B component was in many cases detected as an X-ray source, in contrast to previous findings that X-ray emission among late-B field stars is rather uncommon.

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