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Spatially resolved X-ray spectroscopy of the Vela supernova remnant
Lu FJ(卢方军); Lu, FJ; Aschenbach, B
2000
发表期刊ASTRONOMY & ASTROPHYSICS
卷号362期号:3页码:1083-1092
通讯作者Max Planck Inst Extraterr Phys, D-85741 Garching, Germany ; CAS, Inst High Energy Phys, Lab Cosm Ray & High Energy Astophys, Beijing 100039, Peoples R China
摘要Spatially resolved (typically 10') soft X-ray spectral analyses of the whole Vela supernova remnant (SNR) are presented. The X-ray data were obtained in the ROSAT all-sky survey (RASS). The spectra can be well represented by two-temperature Raymond-Smith thermal plasma models. The spatial distributions of the temperatures of the hot component show that most of the central and the southern parts of the remnant are significantly hotter (1.2 keV) than the northern half (0.5 keV). The temperatures of the cool component range from 0.09 keV to 0.25 keV and have a distribution similar to that of the hot component. The emission measure of the cool component dominates the X-ray emission. It is distributed like the observed brightness, bright in the north and east and it shows filamentary structure. The distribution of the hot component emission measure appears to be flatter and it is significantly different from the intensity map. The absorption column densities N-H range from 5 x 10(19) cm(-2) to 6 x 10(20) cm(-2). The distribution shows that a large region in the north-east and the entire south-west are strongly absorbed. These strong absorption regions probably correspond to shocked low density HI clouds. We show that the Vela pulsar X-ray jet corresponds to an enhanced thermal pressure region south of the Vela pulsar. Both the thermal pressure map and the 0.9-2.4 keV intensity map show that the X-ray jet is 40' longer than previously claimed. The total X-ray flux of the Vela SNR in the 0.1-2.5 keV band is about 1.3 x 10(-8) erg cm(-2) s(-1). It corresponds to a luminosity of 2.2 x 10(35) erg s(-1) for a distance of 250 pc.
文章类型Article
关键词shock waves ISM : individual objects : Vela SNR ISM : supernova remnants X-rays : ISM
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000165455400035
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被引频次:39[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239017
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Lu FJ,Lu, FJ,Aschenbach, B. Spatially resolved X-ray spectroscopy of the Vela supernova remnant[J]. ASTRONOMY & ASTROPHYSICS,2000,362(3):1083-1092.
APA 卢方军,Lu, FJ,&Aschenbach, B.(2000).Spatially resolved X-ray spectroscopy of the Vela supernova remnant.ASTRONOMY & ASTROPHYSICS,362(3),1083-1092.
MLA 卢方军,et al."Spatially resolved X-ray spectroscopy of the Vela supernova remnant".ASTRONOMY & ASTROPHYSICS 362.3(2000):1083-1092.
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