A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1.

摘要：

We present the preliminary spectral analysis of a 25 ks long Chandra observation of the peculiar source Cir X-1 near the periastron passage. We estimate more precise coordinates of the source compatible with the optical and radio counterpart coordinates. We detect emission lines associated to Mg ??, Si ??, Si ??, S ??, S ?? Ar ??, Ar ??, Ca ??, Ca ??, Fe ??, Fe ?? showing a redshift of 470km s<-1>. The more intense emission features at 6.6keV show a double-peaked shape that can be modelled with two or three Gaussian lines.

关键词： accretion discs-stars individual Cir X-1--stars neutron stars--X-ray stars--X-ray spectrum--X-ray general

作者: R. Iaria A. DAi T. Di Salvo G. Lavagetto L. Burderi N. R Robba

作者单位: Dipartimento di Scienze Fisiche ed Astronomiche, Universita di Palermo, via Archirafin. 36, 90123 Pa Dipartimento di Fisica, Universita degli studi di Cagliari, Cittadella Universitaria, S. P. Monserra

会议类型: 国际会议

会议名称: 紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)

会议地点: 安徽黄山

会议语种:英文

页码: 248-250

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）