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arXiv 1509.04490astro-ph.HE
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V0332 +53的轨道参数

Orbital parameters of V 0332+53 from 2015 giant outburst data

V. Doroshenko, S. Tsygankov, A. Santangelo

摘要:

我们给出了瞬态Be X射线双星V 0332+53的更新轨道解,并将历史测量结果与2015年6月至10月爆发期间费米星上伽马射线暴监测器获得的数据进行了补充。我们模拟了观测到的脉冲星自旋频率的变化,并推导了系统的轨道参数。我们显着改善现有的约束,并表明,与以前的研究结果相反,不需要改变轨道参数来解释1983年,2005年和2015年爆发期间源的自旋演化。重建的中子星在最近的爆发的内在自旋的发现与以前观察到的值和预测的吸积力矩理论。

英文摘要:

We present the updated orbital solution for the transient Be X-ray binary V 0332+53 comple- menting historical measurements with the data from the gamma-ray burst monitor onboard Fermi obtained during the outburst in June-October 2015. We model the observed changes in the spin- frequency of the pulsar and deduce the orbital parameters of the system. We significantly improve existing constrains and show that contrary to the previous findings no change in orbital parameters is required to explain the spin evolution of the source during the outbursts in 1983, 2005 and 2015. The reconstructed intrinsic spin-up of the neutron star during the latest outburst is found to be comparable with previosly observed values and predictions of the accretion torque theory.

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