X-rays from the nearby solitary millisecond pulsar PSR J0030+0451:: The final ROSAT observations

被引：20
作者：
Becker, W [1 ]
Trümper, J
Lommen, AN
Backer, DC
机构：
[1] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 545卷 / 02期
关键词：
pulsars : individual (PSR J0030+0451); radiation mechanisms : nonthermal; stars : neutron; X-rays : stars;
D O I：
10.1086/317839
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on X-ray observations of the solitary 4.8 ms pulsar PSR J0030+0451. The pulsar was one of the last targets observed in 1998 December by the ROSAT PSPC. X-ray pulses are detected on a 4.5 sigma level and make the source the 11th millisecond pulsar detected in the X-ray domain. The pulsed fraction is found to be 69% +/- 18%. The X-ray pulse profile is characterized by two narrow peaks that match the gross pulse profile observed at 1.4 GHz. Assuming a Crab-like spectrum the X-ray flux is in the range f(X) = (2-3) x 10(-13) ergs s(-1) cm(-2) (0.1-2.4 keV), implying an X-ray efficiency of L-X/(E)over dot similar to (0.5-5) x 10(-3) (d/0.23 kpc)(2).
引用
收藏
页码：1015 / 1019
页数：5
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