RXTE discovery of multiple cyclotron lines during the 2004 December outburst of V0332+53

被引：67

作者：

Pottschmidt, K

Kreykenbohm, I

Wilms, J

Coburn, W

Rothschild, RE

Kretschmar, P

McBride, V

Suchy, S

Staubert, R

机构：

[1] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

[2] Inst Astron & Astrophys, Astron Sect, D-72076 Tubingen, Germany

[3] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland

[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[5] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94702 USA

[6] European Space Astron Ctr, European Space Agcy, Madrid 28080, Spain

[7] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 634卷 / 01期

基金：

美国国家科学基金会;

关键词：

pulsars : individual (V0332+53); stars : flare; stars : magnetic fields; X-rays : binaries; X-rays : stars;

D O I：

10.1086/498689

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of the 2 - 150 keV spectrum of the transient X-ray pulsar V0332 + 53 taken with the Rossi X-Ray Timing Explorer ( RXTE) in 2004 December. We report on the detection of three cyclotron resonance features at 27, 51, and 74 keV in the phase-averaged data, corresponding to a polar magnetic field of 2.7 x G. After 4U 0115 + 63, this makes V0332 + 53 the second accreting neutron star in which more than two 12 10 cyclotron lines have been detected; this has now also been confirmed by INTEGRAL. Pulse-phase spectroscopy reveals remarkably little variability of the cyclotron line through the 4.4 s X-ray pulse.

引用

页码：L97 / L100

页数：4

共 31 条

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