X-ray emission from A-type stars (Schroeder+, 2007)

Details X-ray emission from A-type stars (Schroeder+, 2007) X-ray emission from A-type stars (Schroeder+, 2007)

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ycat..34750677s&link_type=abstract

VizieR On-line Data Catalog: J/A+A/475/677. Originally published in: 2007A&A...475..677S

Computer Science

Stars: A-Type, X-Ray Sources

Scientific paper

Being fully radiative, stars of spectral type A are not expected to harbor magnetic dynamos and hence such stars are not expected to produce X-ray emission. Indeed, while the X-ray detection rate of such stars in X-ray surveys is low, it is not zero and some of the brighter A-type stars have been detected on different occasions and with different instruments. To study systematically the puzzle of the X-ray emitting A-type stars, we carried out an X-ray study of all A-type stars listed in the Bright Star Catalogue using the ROSAT public data archive. We found a total of 312 bright A-type stars positionally associated with ROSAT X-ray sources; we analyzed the X-ray light curves as well as searched for evidence of RV variations to identify possible late-type companions producing the X-ray emission. In this paper we present a list of X-ray active A-type stars, including the collected data about multiplicity, X-ray luminosity and spectral peculiarities.
(2 data files).

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