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An Einstein Observatory SAO-based catalog of B-type stars

1992; Institute of Physics; Volume: 81; Linguagem: Inglês

10.1086/191705

1538-4365

F. Grillo, S. Sciortino, G. Micela, G. S. Vaiana, Jr. Harnden F. R.,

Scientific Measurement and Uncertainty Evaluation

view Abstract Citations (79) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An Einstein Observatory SAO-based Catalog of B-Type Stars Grillo, F. ; Sciortino, S. ; Micela, G. ; Vaiana, G. S. ; Harnden, F. R., Jr. Abstract About 4000 X-ray images obtained with the Einstein Observatory are used to measure the 0.16-4.0 keV emission from 1545 B-type SAO stars falling in the about 10 percent of the sky surveyed with the IPC. Seventy-four detected X-ray sources with B-type stars are identified, and it is estimated that no more than 15 can be misidentified. Upper limits to the X-ray emission of the remaining stars are presented. In addition to summarizing the X-ray measurements and giving other relevant optical data, the present extensive catalog discusses the reduction process and analyzes selection effects associated with both SAO catalog completeness and IPC target selection procedures. It is concluded that X-ray emission, at the level of Lx not less than 10 exp 30 ergs/s, is quite common in B stars of early spectral types (B0-B3), regardless of luminosity class, but that emission, at the same level, becomes less common, or nonexistent, in later B-type stars. Publication: The Astrophysical Journal Supplement Series Pub Date: August 1992 DOI: 10.1086/191705 Bibcode: 1992ApJS...81..795G Keywords: Astronomical Catalogs; B Stars; Heao 2; X Ray Sources; Proportional Counters; Sky Surveys (Astronomy); Spatial Distribution; Stellar Luminosity; Astrophysics; CATALOGS; STARS: EARLY-TYPE; X-RAYS: STARS full text sources ADS | data products SIMBAD (1541)