Beta Crateris - Another Sirius system in the solar neighbourhood

Details Beta Crateris - Another Sirius system in the solar neighbourhood Beta Crateris - Another Sirius system in the solar neighbourhood

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..47f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. L47-L50.

Astronomy and Astrophysics

Astronomy

31

Atmospheric Composition, Binary Stars, Companion Stars, Stellar Atmospheres, Stellar Temperature, White Dwarf Stars, Rosat Mission, Sky Surveys (Astronomy), Solar Neighborhood, Ultraviolet Astronomy, X Ray Astronomy

Scientific paper

The star Beta Crt (A2 IV; mv = 4.48) has been detected in the Rosat all-sky survey. The Rosat X-ray and EUV data in conjunction with already published optical data suggest that the source of the X-ray emission is not the A star Beta Crt A, but rather a hitherto unknown white dwarf companion Beta Crt B, just like the well-known case of Sirius A and B. However, unlike Sirius B, Beta Crt B is too close to its primary to be resolved and/or studied optically. The temperature and atmospheric composition of the white dwarf companion are estimated and the similarities between this system and Sirius is discussed.

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