HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE LOCAL HOT GAS ALONG THE 3C 273 SIGHTLINE

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	HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE LOCAL HOT GAS ALONG THE 3C 273 SIGHTLINE
	Fang, Taotao ; Jiang, Xiaochuan ; Fang TT(方陶陶)
刊名	http://dx.doi.org/10.1088/2041-8205/785/2/L24
	2014-04-20
关键词	INTERGALACTIC MEDIUM INTERSTELLAR-MEDIUM GALACTIC-CENTER SCULPTOR WALL GAMMA-RAY O-VII ABSORPTION GALAXY CHANDRA EXPLORER
英文摘要	National Natural Science Foundation of China [11243001, 11273021]; Fundamental Research Funds for the Central Universities [2013121008]; X-ray observations of highly ionized metal absorption lines at z = 0 provide critical information on the hot gas distribution in and around the Milky Way. We present a study of more than 10 yr of Chandra and XMM-Newton observations of 3C 273, one of the brightest extragalactic X-ray sources. Compared with previous works, we obtain much tighter constraints on the physical properties of the X-ray absorber. We also find a large, non-thermal velocity at similar to 100-150 km s(-1), the main reason for the higher line equivalent width when compared with other sightlines. Using joint analysis with X-ray emission and ultraviolet observations, we derive a size of 5-15 kpc and a temperature of ( 1.5-1.8) x 10(6) K for the X-ray absorber. The 3C 273 sightline passes through a number of Galactic structures, including radio loops I and IV, the North Polar Spur, and the neighborhood of the newly discovered "Fermi bubbles." We argue that the X-ray absorber is unlikely to be associated with the nearby radio loops I and IV; however, the non-thermal velocity can be naturally explained as the result of the expansion of the "Fermi bubbles." Our data imply a shock-expansion velocity of 200-300 km s(-1). Our study indicates a likely complex environment for the production of the Galactic X-ray absorbers along different sightlines, and highlights the significance of probing galactic feedback with high resolution X-ray spectroscopy.
语种	英语
出版者	IOP PUBLISHING LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92031]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Fang, Taotao,Jiang, Xiaochuan,Fang TT. HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE LOCAL HOT GAS ALONG THE 3C 273 SIGHTLINE[J]. http://dx.doi.org/10.1088/2041-8205/785/2/L24,2014.
APA	Fang, Taotao,Jiang, Xiaochuan,&方陶陶.(2014).HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE LOCAL HOT GAS ALONG THE 3C 273 SIGHTLINE.http://dx.doi.org/10.1088/2041-8205/785/2/L24.
MLA	Fang, Taotao,et al."HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE LOCAL HOT GAS ALONG THE 3C 273 SIGHTLINE".http://dx.doi.org/10.1088/2041-8205/785/2/L24 (2014).