A Connection between Spectral Width and Energetics As Well As Peak Luminosity in Fermi Gamma-Ray Bursts
A Connection between Spectral Width and Energetics As Well As Peak Luminosity in Fermi Gamma-Ray Bursts
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费米伽马射线爆发中谱宽与能量以及峰值光度之间的联系
DOI：
10.3847/1538-4357/ab2b9b
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发表时间：
2019-08
影响因子：
4.9
通讯作者：
Wang D. Z.
中科院分区：
文献类型：
--
作者：
Peng Z. Y.;Zhao X. H.;Yin Y.;Wang D. Z.
我们利用Fermi GBM Burst Catalog提供的BEST峰值通量P和时间积分F谱数据，重新考察了伽马射线暴的EFE谱中的谱宽。我们首先计算了BEST谱宽，并与一些典型的物理模型进行了比较。我们的分析结果与前人的结果一致：黑体发射本身不能解释观测到的光谱，大部分观测到的光谱不能用同步辐射解释。然后，我们检查了光谱宽度与可观测到的持续时间、通量和峰值通量等模型无关的爆发特性之间的相关性，发现P和F光谱之间存在正相关关系。此外，短期爆发似乎扩展了长期爆发的相关性。我们进一步证明，这些正相关也存在于宇宙学静止系中；即光谱宽度与各向同性等效能量Eiso以及各向同性等效峰光度Liso在不同的能带和时间尺度上相关。我们的结果表明，更宽的爆发具有更大的能量和亮度。此外，短期爆发似乎会从质量上延长这一趋势。考虑到阿玛蒂关系，我们倾向于认为光谱形状与能量和光度有关。
We have revisited the spectral width in the EFE spectrum of gamma-ray bursts with the BEST peak flux P and time-integrated F spectral data provided by the Fermi GBM Burst Catalog. We first compute the BEST spectral widths to compare with some typical physics models. Our analysis results consist with the previous results: blackbody emission alone cannot explain the observed spectrum and most of the observed spectra cannot be interpreted by the synchrotron radiation. We then check the correlations between the spectral width and the observable model-independent burst properties of duration, fluence, and peak flux and find that positive correlations exist between them for both the P and F spectra. Moreover, the short burst appears to extend the correlation found for the long burst. We further demonstrate that these positive correlations also exist in the cosmological rest frame; that is, the spectral width correlates with the isotropic-equivalent energy Eiso as well as the isotropic-equivalent peak luminosity Liso for different energy bands and timescales. Our results show that the wider bursts have larger energy and luminosity. Moreover, short bursts would appear to extend this trend qualitatively. Taking the Amati relation into account, we tend to believe that the spectral shape is related to energy and luminosity.
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DOI：
10.1086/421285
发表时间：
2003-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
D. Yonetoku;T. Murakami;T. Nakamura;R. Yamazaki;A. Inoue;K. University;Kyoto University;O. Universit
通讯作者：
D. Yonetoku;T. Murakami;T. Nakamura;R. Yamazaki;A. Inoue;K. University;Kyoto University;O. Universit
伽马射线暴的新分类方法
影响因子：
4.9
作者：
Lue, Hou-Jun;Zhang, Bing;Liang, En-Wei;Zhang, Bin-Bin
通讯作者：
Zhang, Bin-Bin
DOI：
10.1088/0067-0049/211/1/12
发表时间：
2014-01
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
D. Gruber;A. Goldstein;Victoria Weller von Ahlefeld;P. N. Bhat;E. Bissaldi;M. Briggs;D. Byrne
通讯作者：
D. Gruber;A. Goldstein;Victoria Weller von Ahlefeld;P. N. Bhat;E. Bissaldi;M. Briggs;D. Byrne
影响因子：
4.8
作者：
Y. Qin;Zhi-Fu Chen
通讯作者：
Y. Qin;Zhi-Fu Chen
DOI：
10.1086/307790
发表时间：
1998-10
期刊：
The Astrophysical Journal
影响因子：
--
作者：
A. MacFadyen;S. Woosley
通讯作者：
A. MacFadyen;S. Woosley