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HD 56039


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An Einstein Observatory SAO-based catalog of B-type stars
About 4000 X-ray images obtained with the Einstein Observatory are usedto measure the 0.16-4.0 keV emission from 1545 B-type SAO stars fallingin the about 10 percent of the sky surveyed with the IPC. Seventy-fourdetected X-ray sources with B-type stars are identified, and it isestimated that no more than 15 can be misidentified. Upper limits to theX-ray emission of the remaining stars are presented. In addition tosummarizing the X-ray measurements and giving other relevant opticaldata, the present extensive catalog discusses the reduction process andanalyzes selection effects associated with both SAO catalog completenessand IPC target selection procedures. It is concluded that X-rayemission, at the level of Lx not less than 10 exp 30 ergs/s, is quitecommon in B stars of early spectral types (B0-B3), regardless ofluminosity class, but that emission, at the same level, becomes lesscommon, or nonexistent, in later B-type stars.

Radial velocities of Southern B stars determined at the Radcliffe Observatory - VIII. Stars with HD spectral types B8 and B9
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Investigation of a Milky Way field in Canis Major
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974AJ.....79.1022C&db_key=AST

Lista de estrellas "B" de luminosidad baja E intermedia.
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Dades d'Observació i Astrometria

Constel·lació:Canis Major
Ascensió Recta:07h14m59.91s
Declinació:-11°52'13.5"
Magnitud Aparent:8.265
Distancia:578.035 parsecs
Moviment propi RA:-4.3
Moviment propi Dec:3.2
B-T magnitude:8.186
V-T magnitude:8.259

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 56039
TYCHO-2 2000TYC 5402-822-1
USNO-A2.0USNO-A2 0750-03758404
HIPHIP 35059

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