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X-ray timing observations of PSR J1930+1852 in the crab-like SNR G54.1+0.3
Lu FJ(卢方军); Qu JL(屈进禄); Lu, FJ; Wang, QD; Gotthelf, EV; Qu, JL
2007
发表期刊ASTROPHYSICAL JOURNAL
卷号663期号:1页码:315-319
通讯作者Chinese Acad Sci, Inst High Energy Phys, Lab Particle Astrophys, Beijing 100039, Peoples R China ; Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA ; Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA
文章类型Article
摘要We present new X-ray timing and spectral observations of PSR J1930+1852, the young energetic pulsar at the center of the nonthermal supernova remnant G54.1+0.3. Using data obtained with the Rossi X-Ray Timing Explorer (RXTE) and Chandra X-ray observatories we have derived an updated timing ephemeris of the 136 ms pulsar spanning 6 years. During this interval, however, the period evolution shows significant variability from the best-fit constant spin- down rate of P = 7.5112(6); 10(-13) s s(-1), suggesting strong timing noise and/ or glitch activity. The X- ray emission is highly pulsed (71% +/- 5% modulation) and is characterized by an asymmetric, broad profile (similar to 70% duty cycle) that is nearly twice the radio width. The spectrum of the pulsed emission is well fitted with an absorbed power law of photon index Gamma 1.2 +/- 0.2; this is marginally harder than that of the unpulsed component. The total 2-10 keV flux of the pulsar is 1.7 x 10(-12) ergs cm(-2) s(-1). These results confirm PSR J1930+1852 as a typical Crablike pulsar.
关键词ISM : individual (G54.1+0.3) ISM : jets and outflows radiation mechanisms : nonthermal stars : individual (PSR J1930+1852) supernova remnants X-rays : ISM
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/518713
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000247542700025
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被引频次:6[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/311005/236928
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,Qu JL,Lu, FJ,et al. X-ray timing observations of PSR J1930+1852 in the crab-like SNR G54.1+0.3[J]. ASTROPHYSICAL JOURNAL,2007,663(1):315-319.
APA 卢方军,屈进禄,Lu, FJ,Wang, QD,Gotthelf, EV,&Qu, JL.(2007).X-ray timing observations of PSR J1930+1852 in the crab-like SNR G54.1+0.3.ASTROPHYSICAL JOURNAL,663(1),315-319.
MLA 卢方军,et al."X-ray timing observations of PSR J1930+1852 in the crab-like SNR G54.1+0.3".ASTROPHYSICAL JOURNAL 663.1(2007):315-319.
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