Is the Cygnus Superbubble a Hypernova Remnant?
Is the Cygnus Superbubble a Hypernova Remnant?
复制标题
天鹅座超级气泡是超新星遗迹吗？
DOI：
10.1093/pasj/65.1.14
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Masayuki
中科院分区：
文献类型：
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作者：
Kimura;Masashi; Tsunemi;Hiroshi; Tomida;Hiroshi; Sugizaki;Mutsumi; Ueno;Shiro; Hanayama;Takanori; Yoshidome;Koshiro; Sasaki;Masayuki
We present here an observation of the Cygnus Superbubble (CSB) using the Solid-state slit camera (SSC) aboard the Monitor of All-sky X-ray Image (MAXI). The CSB is a large diffuse structure in the Cygnus region with enhanced soft X-ray emission. By utilizing the CCD spectral resolution of the SSC, we detected Fe, Ne, Mg emission lines from the CSB for the first time. The best-fit model implies a thin hot plasma of0.3 keV with a depleted abundance of 0.260.1 solar. Joint spectrum fittings of the ROSAT/PSPC data and MAXI/SSC data enabled us to measure precise values ofand the temperature inside the CSB. The results show that all of the regions in the CSB have a similarand temperature, indicating that the CSB is a single unity. An energy budgets calculation suggests that (2–3)yr of stellar wind from the Cyg OB2 is sufficient to power up the CSB, whereas due to its off-center position, the origin of the CSB is most likely to be a Hypernova.
