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arXiv 0810.4804astro-ph
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IGR J00291 +5934的XMM-牛顿观测:静止期间热光谱分量的迹象

XMM-Newton observations of IGR J00291+5934: signs of a thermal spectral component during quiescence

Sergio Campana, Luigi Stella, Gianluca Israel, Paolo D'Avanzo

摘要:

本文介绍了瞬时吸积动力毫秒脉冲星IGR J 00291 +5934在静止期的X射线观测结果。IGR J 00291 +5934是第一个在其静止光谱中显示出热成分的源。拟合这个组件与中子星大气或黑体模型,我们得到软温度(~64 eV和~110 eV,分别)。在这类的其他来源的硬光谱成分也存在,包括超过60%的未吸收的0.5-10千电子伏通量。将软成分解释为来自中子星的冷却辐射,我们可以得出结论,致密物体可以通过仅吸积<0.2太阳质量而旋转到毫秒周期。

英文摘要:

We present X-ray observations of the transient accretion-powered millisecond pulsar IGR J00291+5934 during quiescence. IGR J00291+5934 is the first source among accretion powered millisecond pulsars to show signs of a thermal component in its quiescent spectrum. Fitting this component with a neutron star atmosphere or a black body model we obtain soft temperatures (~64 eV and ~110 eV, respectively). As in other sources of this class a hard spectral component is also present, comprising more than 60% of the unabsorbed 0.5-10 keV flux. Interpreting the soft component as cooling emission from the neutron star, we can conclude that the compact object can be spun up to milliscond periods by accreting only <0.2 solar masses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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