X-ray emission from O-type stars : DH Cep and HD 97434
Abstract
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.
Keywords
Cite
@article{arxiv.1004.0577,
title = {X-ray emission from O-type stars : DH Cep and HD 97434},
author = {Himali Bhatt and J. C. Pandey and Brijesh Kumar and Ram Sagar and K. P. Singh},
journal= {arXiv preprint arXiv:1004.0577},
year = {2015}
}
Comments
13 pages ; 2 figures; 2 tables (Accepted for publication in New Astronomy)