X-ray emission from O-type stars : DH Cep and HD 97434
arXiv:1004.0577 · doi:10.1016/j.newast.2010.04.001
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.
13 pages ; 2 figures; 2 tables (Accepted for publication in New Astronomy)
References in corpus (10)
- Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
- X-Ray Spectroscopy of Stars
- An XMM-Newton view of the young open cluster NGC 6231 -- II. The OB star population
- The young stellar population in M17 revealed by Chandra
- X-ray emission from early-type stars in the Orion Nebula Cluster
- X-Rays From Massive OB Stars: Thermal Emission From Radiative Shocks
- XMM-Newton X-ray study of early type stars in the Carina OB1 association
- An XMM-Newton observation of the massive binary HD159176
- The Effects of Clumps in Explaining X-ray Emission Lines from Hot Stars
- X-ray emission characteristics of two WR binaries : V444 Cyg and CD Cru
Cited by in corpus (8)
- The IACOB project VIII. Searching for empirical signatures of binarity in fast-rotating O-type stars
- Phase-resolved XMM-Newton and swift observations of WR 25
- Variable stars in young open star cluster NGC 7380
- The ChaMPlane bright X-ray sources - Galactic longitudes l = 2-358 deg
- Is there a compact companion orbiting the late O-type binary star HD 164816?
- Diagnosing Triggered Star Formation in the Galactic H II region Sh 2-142
- X-ray observations of eight young open star clusters : I. Membership and X-ray Luminosity
- High-precision broadband linear polarimetry of early-type binaries IV. Binary system of DH Cephei in the open cluster of NGC 7380