AN EXTENDED X-RAY OBJECT EJECTED FROM THE PSR B1259-63/LS2883 BINARY

被引：24
作者：
Pavlov, George G. [1 ]
Hare, Jeremy [2 ]
Kargaltsev, Oleg [2 ]
Rangelov, Blagoy [2 ]
Durant, Martin
机构：
[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[2] George Washington Univ, Washington, DC 20052 USA
来源：
ASTROPHYSICAL JOURNAL | 2015年 / 806卷 / 02期
基金：
美国国家航空航天局;
关键词：
pulsars:; individual; (B1259; 63); stars: early-type; stars: individual (LS 2883); stars: neutron; X-rays: binaries; GAMMA-RAYS; PERIASTRON; PULSAR; SYSTEM; STAR; EMISSION; DISCOVERY; WIND;
D O I：
10.1088/0004-637X/806/2/192
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the analysis of Chandra X-ray Observatory observations of the eccentric gamma-ray binary PSR B1259-63/LS 2883. The analysis shows that the extended X-ray feature seen in previous observations is still moving away from the binary with an average projected velocity of approximate to 0.07c and shows a hint of acceleration. The spectrum of the feature appears to be hard (photon index Gamma approximate to 0.8) with no sign of softening compared to previously measured values. We interpret it as a clump of plasma ejected from the binary through the interaction of the pulsar with the decretion disk of the O-star around periastron passage. We suggest that the clump is moving in the unshocked relativistic pulsar wind (PW), which can accelerate the clump. Its X-ray emission can be interpreted as synchrotron radiation of the PW shocked by the collision with the clump.
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页数：7
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