Gamma-Ray Burst Formation Rate Inferred from the Spectral Peak Energy-Peak Luminosity Relation
Gamma-Ray Burst Formation Rate Inferred from the Spectral Peak Energy-Peak Luminosity Relation
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DOI：
10.1086/421285
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发表时间：
2003-09
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影响因子：
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通讯作者：
D. Yonetoku;T. Murakami;T. Nakamura;R. Yamazaki;A. Inoue;K. University;Kyoto University;O. Universit
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文献类型：
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作者：
D. Yonetoku;T. Murakami;T. Nakamura;R. Yamazaki;A. Inoue;K. University;Kyoto University;O. Universit
我们基于光谱峰值能量（Ep）和峰值光度之间的新关系来估算伽马射线暴（GRB）的形成率。该新关系是通过结合贝波萨克斯（BeppoSAX）和爆发和瞬态源实验（BATSE）所获得的Ep和峰值光度的数据推导出来的，它看起来比以往研究中提出的关系更为紧密和可靠。利用新的Ep - 光度关系，我们估算了BATSE目录中689个距离未知的伽马射线暴的红移，并得出了伽马射线暴形成率随红移变化的函数。在0 ≤ z ≤ 2的红移范围内，伽马射线暴形成率上升，并且与恒星形成率有很好的相关性，而在z约为12时则保持恒定。我们还讨论了光度函数以及内禀光度（光度演化）对红移的依赖性。
We estimate a gamma-ray burst (GRB) formation rate based on the new relation between the spectral peak energy (Ep) and the peak luminosity. The new relation is derived by combining the data of Ep and the peak luminosities by BeppoSAX and BATSE, and it looks considerably tighter and more reliable than the relations suggested by the previous works. Using the new Ep-luminosity relation, we estimate redshifts of the 689 GRBs without known distances in the BATSE catalog and derive a GRB formation rate as a function of the redshift. For the redshift range of 0 ≤ z ≤ 2, the GRB formation rate increases and is well correlated with the star formation rate, while it keeps constant toward z ~ 12. We also discuss the luminosity function and the redshift dependence of the intrinsic luminosity (luminosity evolution).