ROSAT X-ray All-Sky Survey observations of hybrid stars

Details ROSAT X-ray All-Sky Survey observations of hybrid stars ROSAT X-ray All-Sky Survey observations of hybrid stars

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...388l..61h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 388, April 1, 1992, p. L61-L64. Research supported by Lockheed In

Astronomy and Astrophysics

Astronomy

23

Rosat Mission, Sky Surveys (Astronomy), Stellar Coronas, Stellar Spectrophotometry, X Ray Stars, Astronomical Catalogs, Iue, Magnetohydrodynamic Waves

Scientific paper

Data from the Rosat All-Sky Survey for nine hybrid stars, objects showing spectroscopic evidence for cool massive winds and 500,000-K material, are presented. Two of the nine stars were detected above a limiting flux threshold of 2 x 10 exp -13 ergs/sq cm s. The K3 III star Delta And was detected just at this threshold. The K4 III star Alpha TrA was measured at 8 x 10 exp -13 ergs/sq cm s. Since these detections were made in both low- and high-energy bands of the Rosat 0.1-2.4-keV passband, it is suggested that the emissions originate in coronae of about 10 exp 7 K.

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