Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331l.113t&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 331, Aug. 15, 1988, p. L113-L116.
Astronomy and Astrophysics
Astrophysics
20
Pre-Main Sequence Stars, Seyfert Galaxies, Stellar Flares, Stellar Spectra, X Ray Sources, Binary Stars, Exosat Satellite, Late Stars, Light Curve, T Tauri Stars
Scientific paper
The authors report the serendipitous discovery by EXOSAT of a flaring X-ray source in the field of the Seyfert type I galaxy III Zw 2. In contrast to an earlier report that attributed the variability observed by the medium energy experiment to III Zw 2, it is shown that the variability was entirely due to the serendipitous source. The authors identify this source with the visual binary HD 560 (B9 V+G5 Ve) and they argue that virtually all of the observed X-ray flux from the binary, including the flare, came from its late-type component. These X-ray observations bring support to the optical classification of HD 560 B as a post-T Tauri star.
Angelini Leonardo
Giommi Paolo
Osborne Julian Paul
Pallavicini Roberto
Tagliaferri Giampiero
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