Artículo
X-Ray Emission from Massive Stars in Cyg OB2
Rauw, G.; Naze, Y.; Wright, N. J.; Drake, J. J.; Guarcello, M.G.; Prinja, R. K.; Peck, L. W.; Albacete Colombo, Juan Facundo
; Herrero, A.; Kobulnicky, H. A.; Sciortino, S.
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Fecha de publicación:
11/2015
Editorial:
IOP Publishing
Revista:
Astrophysical Journal Supplement Series
ISSN:
0067-0049
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We report on the analysis of the Chandra-ACIS data of O, B, and WR stars in the young association Cyg OB2. X-ray spectra of 49 O-stars, 54 B-stars, and 3 WR-stars are analyzed and for the brighter sources, the epoch dependence of the X-ray fluxes is investigated. The O-stars in Cyg OB2 follow a well-defined scaling relation between their X-ray and bolometric luminosities: . This relation is in excellent agreement with the one previously derived for the Carina OB1 association. Except for the brightest O-star binaries, there is no general X-ray overluminosity due to colliding winds in O-star binaries. Roughly half of the known B-stars in the surveyed field are detected, but they fail to display a clear relationship between LX and Lbol. Out of the three WR stars in Cyg OB2, probably only WR 144 is itself responsible for the observed level of X-ray emission, at a very low . The X-ray emission of the other two WR-stars (WR 145 and 146) is most probably due to their O-type companion along with a moderate contribution from a wind-wind interaction zone.
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Articulos(CCT - PATAGONIA CONFLUENCIA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA CONFLUENCIA
Citación
Rauw, G.; Naze, Y.; Wright, N. J.; Drake, J. J.; Guarcello, M.G.; et al.; X-Ray Emission from Massive Stars in Cyg OB2; IOP Publishing; Astrophysical Journal Supplement Series; 221; 1; 11-2015; 1-20
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