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Suzaku Observations of the Prototype Wind-Blown Bubble NGC 6888
Svetozar A. Zhekov, Sangwook Park
We present an analysis of the Suzaku observations of the prototype wind-blown bubble NGC 6888 which is based both on use of standard spectral models and on a direct comparison of t…
XMM-Newton Observations Reveal Very High X-ray Luminosity from the Carbon-rich Wolf-Rayet Star WR 48a
Svetozar A. Zhekov, Marc Gagne, Stephen L. Skinner
We present XMM-Newton observations of the dusty Wolf-Rayet star WR 48a. This is the first detection of this object in X-rays. The XMM-Newton EPIC spectra are heavily absorbed and t…
Chandra HETG Observations of the Colliding Stellar Wind System WR 147
Svetozar A. Zhekov, Sangwook Park
We present an extended analysis of deep Chandra HETG observations of the WR+OB binary system WR 147 that was resolved into a double X-ray source (Zhekov & Park, 2010, ApJ, 709, L11…
Evolution of the Chandra CCD Spectra of SNR 1987A: Probing the Reflected-Shock Picture
Svetozar A. Zhekov, Sangwook Park, Richard McCray +2
We continue to explore the validity of the reflected shock structure (RSS) picture in SNR 1987A that was proposed in our previous analyses of the X-ray emission from this object. W…
Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in Berkeley 87
Kimberly R. Sokal, Stephen L. Skinner, Svetozar A. Zhekov +2
We present first results of a Chandra X-ray observation of the rare oxygen-type Wolf-Rayet star WR 142 (= Sand 5 = St 3) harbored in the young, heavily-obscured cluster Berkeley 87…