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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku observations of Hercules X-1: Measurements of the two cyclotron harmonics
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Suzaku observations of Hercules X-1: Measurements of the two cyclotron harmonics

机译：朱雀的大力神X-1观测：两个回旋加速器谐波的测量

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摘要

The accretion-powered pulsar Her X-1 was observed with Suzaku twice in its main-on state, on 2005 October 5-6 and 2006 March 29-30, for a net exposure of 30.5 ks and 34.4 ks, respectively. In the 2005 and 2006 observations, the source was detected at an average 10-30 keV intensity of 290 mCrab and 230 mCrab, respectively. The intrinsic pulse period was measured on both occasions at 1.23776 s by HXD-PIN, after barycentric and binary corrections. The pulse phase-averaged spectra in the energy range above 10 keV were well fitted by the "Negative and Positive power-law times EXponential" (NPEX) model, multiplied by a fundamental cyclotron resonance scattering feature at similar to 36 keV, which appears very significantly in the HXD-PIN data. The resonance profiles were successfully reproduced by a Lorentzian-type scattering cross section, rather than by a Gaussian-type alternative. The pulse phase-averaged HXD-GSO data, covering 50-120 keV, are featureless. However, in a differential spectrum between the pulse-decay phase and off-pulse phase, the second-harmonic cyclotron resonance was detected in the GSO data at similar to 73 keV, with a depth of 1.6(-0.7)(+0.9) This makes Her X-1 a 6th pulsar with established second-harmonic resonance. The implications of these results are briefly discussed.
机译：2005年10月5日至6日和2006年3月29日至30日，朱雀两次以增生为动力的脉冲星Her X-1被观测到处于朱雀状态，分别处于30.5 ks和34.4 ks的净照射下。在2005年和2006年的观测中，分别以290 mCrab和230 mCrab的平均10-30 keV强度检测到了该源。在重心校正和二进制校正之后，通过HXD-PIN分别在1.23776 s处测量了固有脉冲周期。通过“负和正幂律乘幂指数”（NPEX）模型很好地拟合了能量在10 keV以上的脉冲相位平均光谱，再乘以类似于36 keV的基本回旋共振散射特征。 HXD-PIN数据中的重要位置。通过洛伦兹型散射截面而不是高斯型替代物成功地再现了共振曲线。覆盖50-120 keV的脉冲相位平均HXD-GSO数据没有任何特征。但是，在脉冲衰减相位和非脉冲相位之间的差分频谱中，在GSO数据中以类似于73 keV的频率检测到二次谐波回旋共振，深度为1.6（-0.7）（+ 0.9）。使她的X-1成为具有第二谐波共振的第六脉冲星。简要讨论了这些结果的含义。

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