Ohno 2008 GRB 061007的随时间演化的E_p-L关系
主要内容:
精彩摘抄:在Youlitouku关系上的点(红色)
把061007按时间分段(可以分出这么多段? 时间分辨率挺高的吗)后在E_p-L_iso上的图.
如果能把每个点所对应的时间也加上就更好了, 可以看到点在这个图上的演化. 不过其中有个表列了这些点, 估计包含了这些信息.
另外这个图上有一个比较明显的界线, 就是右下角是空白的. 不知道是物理上有什么限制, 还是观测上的(不像).
文章信息:
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Title: | Time-evolution of Peak Energy and Luminosity Relation within Pulses for GRB 061007: Probing Fireball Dynamics | |
Authors: | Ohno, Masanori; Ioka, Kunihito; Yamaoka, Kazutaka; Tashiro, Makoto; Fukazawa, Yasushi; Nakagawa, Yujin E. | |
Publication: | eprint arXiv:0812.3737 | |
Publication Date: | 12/2008 | |
Origin: | ARXIV | |
Keywords: | Astrophysics | |
Comment: | 21 pages, 16 figures, accepted for publication in PASJ | |
Bibliographic Code: | 2008arXiv0812.3737O |
Abstract
We perform a time-resolved spectral analysis of bright, long Gamma-ray burst GRB 061007 using Suzaku/WAM and Swift/BAT. Thanks to the large effective area of the WAM, we can investigate the time evolution of the spectral peak energy, Et_peak and the luminosity Lt_iso with 1-sec time resolution, and we find that luminosity Lt_iso with 1-sec time resolution, and we find that the time-resolved pulses also satisfy the Epeak-Liso relation, which was found for the time-averaged spectra of other bursts, suggesting the same physical conditions in each pulse. Furthermore, the initial rising phase of each pulse could be an outlier of this relation with higher Et_peak value by about factor 2. This difference could suggest that the fireball radius expands by a factor of 2-4 and/or bulk Lorentz factor of the fireball is decelerated by a factor of 4 during the initial phase, providing a new probe of the fireball dynamics in real time.Bibtex entry for this abstract Preferred format for this abstract (see Preferences)
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