Rosat observations of PSR 0656 + 14 - A pulsating and cooling neutron star
Rosat observations of PSR 0656 + 14 - A pulsating and cooling neutron star
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Rosat 对 PSR 0656 14 的观测 - 脉动和冷却中子星
DOI：
10.1086/186463
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Ü. Kızıloğlu
中科院分区：
文献类型：
--
作者：
J. Finley;H. Ögelman;Ü. Kızıloğlu
本文报道了1991年3月25日用Rosat星上的位置灵敏正比计数器对X射线射电脉冲星PSR 0656 + 14的观测结果。射电周期约为0.385 s的脉冲在14 +/-2%的脉冲分数下被检测到。黑体描述得出的表面温度约为（9.0 +/-0.4）x 10 exp 5 K，等效柱密度约为（1.0 +/-0.2）x 10 exp 20/cm 2，假设源距离为500 pc，恒星半径为10 km。发现脉冲发射的相位和X射线硬度之间存在正相关，这表明脉冲在中子星星表面的“热点”中占有一席之地。讨论了模型对中子星冷却曲线的影响。
Observations of the X-ray-emitting radio pulsar PSR 0656 + 14 with the Position Sensitive Proportional Counter on board Rosat on March 25, 1991 are reported. Pulsations at the radio period, about 0.385 s, were detected at a pulsed fraction of 14 +/-2 percent. A blackbody description yields a surface temperature of about (9.0 +/-0.4) x 10 exp 5 K, an equivalent column density of about (1.0 +/-0.2) x 10 exp 20/sq cm, and a stellar radius of 10 km under the assumption of a 500 pc source distance. A positive correlation is found to exist between the phase of the pulsed emission and the X-ray hardness, suggesting that the pulsations have their seat in a 'hot spot' on the neutron star surface. Implications of the models with regard to the cooling curve of neutron stars are discussed.