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UNRAVELING THE COOLING TREND OF THE SOFT GAMMA REPEATER SGR 1627-41

机译:释放软伽玛中继器SGR 1627-41的冷却趋势

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SGR 1627-41 was discovered in 1998 after a single active episode that lasted ~6 weeks. We report here our monitoring results of the decay trend of the persistent X-ray luminosity of the source during the last 5 years. We find an initial temporal power-law decay with index 0.47, reaching a plateau that is followed by a sharp (factor of 10) flux decline ~800 days after the source activation. The source spectrum is best described during the entire period by a single power law with high absorption [N_H = 9.0(7) x 10~(22) cm~(-2)]; the spectral index, however, varies dramatically between 2.2 and 3.8 spanning the entire range for all known soft gamma repeater sources. We discuss the cooling behavior of the neutron star assuming a deep crustal heating initiated by the burst activity of the source during 1998.
机译:SGR 1627-41是在1998年发现一个持续约6周的活跃事件后发现的。我们在这里报告了我们对过去5年中源的持续X射线光度衰减趋势的监测结果。我们发现初始的时间幂律衰减为0.47,到达一个平台,然后在源激活后约800天急剧(10倍)通量下降。在整个周期中,源谱最好用具有高吸收率的单一幂定律[N_H = 9.0(7)x 10〜(22)cm〜(-2)]来描述。但是,对于所有已知的软伽玛中继器源,其光谱指数在2.2至3.8之间变化很大,跨越整个范围。我们假设中子星的冷却行为是在1998年由源的爆发活动引发的深层地壳加热中得出的。

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