X-ray emission from O-type stars: DH Cep and HD 97434

Bhatt, Himali ; Pandey, J. C. ; Kumar, Brijesh ; Sagar, Ram ; Singh, K. P. (2010) X-ray emission from O-type stars: DH Cep and HD 97434 New Astronomy, 15 (8). pp. 755-759. ISSN 1384-1076

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.newast.2010.04.001


We present X-ray emission characteristics of the massive O-type stars DH Cep and HD 97434 using archival XMM-Newton observations. There is no convincing evidence for short-term variability in the X-ray intensity during the observations. However, the analysis of their spectra reveals X-ray structure being consistent with two-temperature plasma model. The hydrogen column densities derived from X-ray spectra of DH Cep and HD 97434 are in agreement with the reddening measurements for their corresponding host clusters NGC 7380 and Trumpler 18, indicating that the absorption by stellar wind is negligible. The X-ray emission from these hot stars is interpreted in terms of the standard instability-driven wind-shock model.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Star: X-ray; Star: Binary; Star: Wind; Star: Individual (DH Cep and HD 97434)
ID Code:59011
Deposited On:03 Sep 2011 12:13
Last Modified:22 Jul 2012 15:07

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