Suzaku X-ray Spectroscopy of a Peculiar Hot Star Near the Galactic Center

Details Suzaku X-ray Spectroscopy of a Peculiar Hot Star Near the Galactic Center Suzaku X-ray Spectroscopy of a Peculiar Hot Star Near the Galactic Center

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..387..448h&link_type=abstract

Massive Star Formation: Observations Confront Theory ASP Conference Series, Vol. 387, proceedings of the conference held 10-14 S

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the results from an X-ray spectral study of a peculiar point-like source near the Galactic center using Japanese X-ray satellite Suzaku.
We detected an intense Fe XXV Kα line with an equivalent width of ˜ 1 keV. The overall X-ray spectrum is very well described by an optically-thin thermal plasma model with a temperature of ˜5×10^7 K and Fe abundance of ˜0.8 solar absorbed by an inter-stellar column of N_{H}˜2×10^{23} cm^{-2}. We also analyzed the archived data of Chandra and XMM-Newton and find that the X-ray flux spanning ˜ 6 years shows year-scale time variability of a factor of ˜ 2. The probable counterpart in the IR bands is very bright (L_bol˜ 10^{4.9} L_&sun;) and has a cool (T_{BB}˜ 1000 K) spectral energy distribution. The most plausible nature of this source is a carbon-rich Wolf-Rayet binary system.

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