| Cyg X-1高态中短暴性质的研究 |
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| 引用本文： | 张明轩,屈进禄.Cyg X-1高态中短暴性质的研究[J].天文学报,2004,45(4):356-360. |
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| 作者姓名： | 张明轩 屈进禄 |
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| 作者单位： | 1. 中国科学院高能物理研究所,北京,100039;石家庄师范学院,石家庄,050018
2. 中国科学院高能物理研究所,北京,100039 |
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| 基金项目： | 国家重点基础研究专项经费和国家科学基金资助项目(10273010) |
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| 摘 要： | CygX-1高能辐射的时变特征可以通过短暴(shot)的性质反映．因此CygX-1的短暴性质，特别是处于低态时的性质曾被广泛研究,利用直接叠加短暴和自相关函数，对CygX-1高态时短暴的性质进行了研究．结果表明，当CygX-1处于高态时，其短暴的结构类似于低态时所具有的性质，短暴的半高宽随能量的增加按指数下降．此结果和康普顿化模型不一致．另外，短暴的能谱演化及结构的非对称性可以解释CygX-1中的时延现象．
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| 关 键 词： | 类似 性质 能谱 时变特征 指数 自相关函数 能量 叠加 高能辐射 演化 |
| 修稿时间： | 2004年4月11日 |
Properties of X-ray Shots of Cyg X-1 in High State |
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| ZHANG Ming-xuan QU Jin-lu.Properties of X-ray Shots of Cyg X-1 in High State[J].Acta Astronomica Sinica,2004,45(4):356-360. |
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| Authors: | ZHANG Ming-xuan QU Jin-lu |
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| Abstract: | The X-ray temporal variability of light curves of Cyg X-1 can be represented by the properties of shot. The properties of shot of Cyg X-1 were studied widely, especially when Cyg X-1 was in its typical state, namely low state/ hard state. In this paper the direct superposing position method of shots and the autocorrelation function are employed to study the properties of shot when Cyg X-1 was in its soft high state/ soft state, The results show that the full widths at half maximum (FWHM) of shots decrease with increasing energy. This is not consistent with the prediction of Comptonization models. The evolution of energy spectra and asymmetric structures of shots may explain the time lag observed in Cyg X-1. |
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| Keywords: | Black hole physics X-rays: burst X-rays: individuals: Cyg X-1 |
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