GAMMA-RAY BURST AFTERGLOWS AS ANALOGS OF HIGH-FREQUENCY-PEAKED BL LAC OBJECTS
GAMMA-RAY BURST AFTERGLOWS AS ANALOGS OF HIGH-FREQUENCY-PEAKED BL LAC OBJECTS
复制标题
伽马射线暴余辉与高频峰值 BL LAC 天体的类似物
DOI：
10.1088/2041-8205/726/1/l4
复制
发表时间：
2010-11
影响因子：
7.9
通讯作者：
王竞
中科院分区：
文献类型：
--
作者：
魏建彦;王竞
比较了18个光亮伽马射线暴(GRB)余辉和blazar中已有的功率谱序列的射电到光学波段的光谱特性。比较表明，余辉与著名的blazar序列(即νLν(5 GHz)-αRO关联，其中αRO是射电到光学波段的宽带谱斜率)符合得很好。然而，余辉聚集在序列的低光度端，通常被高频峰值的BLLac天体(HBL)占据。这种相关性表明，伽玛暴余辉的发射过程与HBL相似。我们进一步确定了三个典型的光学“暗”爆发序列在大于2σ的显著水平上的偏差。这种偏离有利于“暗”爆发的光学带的严重消光。据估计，νLν(5 GHz)-αRO序列的消光AV值大于0.5MAG-0.6MAG。
The spectral properties from radio-to-optical bands are compared between the 18 optically bright gamma-ray burst (GRB) afterglows and the well-established power-spectrum sequence in blazars. The comparison shows that the afterglows are in well agreement with the well-known blazar sequence (i.e., the νLν(5 GHz)–αRO correlation, where αRO is the broadband spectral slope from radio-to-optical bands). The afterglows are, however, clustered at the low-luminosity end of the sequence, which is typically occupied by high-frequency-peaked BL Lac objects (HBLs). The correlation suggests that GRB afterglows share a similar emission process with HBLs. We further identify a deviation at a significance level larger than 2σ from the sequence for three typical optically “dark” bursts. The deviation favors a heavy extinction in optical bands for the “dark” bursts. The extinction AV is estimated to be larger than 0.5–0.6 mag from the νLν(5 GHz)–αRO sequence.
登录
查看更多内容
DOI：
10.1086/427089
发表时间：
2004-11
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
P. Jakobsson;P. Jakobsson;J. Hjorth;J. Fynbo;D. Watson;K. Pedersen;G. Björnsson;J. Gorosabel;J. Gorosabel
通讯作者：
P. Jakobsson;P. Jakobsson;J. Hjorth;J. Fynbo;D. Watson;K. Pedersen;G. Björnsson;J. Gorosabel;J. Gorosabel
DOI：
10.1086/320858
发表时间：
2001-01
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
S. Jorstad;A. Marscher;J. Mattox;A. Wehrle;S. Bloom;A. V. Yurchenko
通讯作者：
S. Jorstad;A. Marscher;J. Mattox;A. Wehrle;S. Bloom;A. V. Yurchenko
DOI：
10.1088/2041-8205/712/1/l26
发表时间：
2010-01
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
E. Levesque;L. Kewley;J. Graham;A. Fruchter
通讯作者：
E. Levesque;L. Kewley;J. Graham;A. Fruchter
DOI：
10.1086/383019
发表时间：
2003-08
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Z. Dai
通讯作者：
Z. Dai
影响因子：
1.1
作者：
L. Resmi
通讯作者：
L. Resmi