期刊
ASTRONOMY & ASTROPHYSICS
卷 451, 期 1, 页码 267-272出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20054239
关键词
X-rays : stars; stars : magnetic fields; stars : pulsars : individual : MXB 0656-072
资金
- STFC [PP/D001013/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D001013/1] Funding Source: researchfish
We have monitored a type II outburst of the Be/X-ray binary MXB 0656-072 in a series of pointed RXTE observations during October through December 2003. The source spectrum shows a cyclotron resonance scattering feature at 32.8(-0.4)(+0.5) keV, corresponding to a magnetic field strength of 3.67(-0.04)(+ 0.06) x 10(12) G and is stable through the outburst and over the pulsar spin phase. The pulsar, with an average pulse period of 160.4 +/- 0.4 s, shows a spin-up of 0.45 s over the duration of the outburst. From optical data, the source distance is estimated to be 3.9 +/- 0.1 kpc and this is used to estimate the X-ray luminosity and a theoretical prediction of the pulsar spin-up during the outburst.
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