GAMMA-RAY BURSTS: TEMPORAL SCALES AND THE BULK LORENTZ FACTOR

被引：24

作者：

Sonbas, E. ^{[1
,2
]}

MacLachlan, G. A. ^{[2
]}

Dhuga, K. S. ^{[2
]}

Veres, P. ^{[2
]}

Shenoy, A. ^{[2
]}

Ukwatta, T. N. ^{[3
]}

机构：

[1] Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkey

[2] George Washington Univ, Dept Phys, Washington, DC 20052 USA

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 805卷 / 02期

关键词：

gamma-ray burst: general; methods: data analysis; FERMI OBSERVATIONS; SPECTRAL LAGS; GRB; 130427A; EMISSION; ENERGY; VARIABILITY; PROMPT; COMPONENT; FIREBALLS; ORIGIN;

D O I：

10.1088/0004-637X/805/2/86

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

For a sample of Swift and Fermi gamma-ray bursts, we show that the minimum variability timescale and the spectral lag of the prompt emission is related to the bulk Lorentz factor in a complex manner. For small Gamma's, the variability timescale exhibits a shallow (plateau) region. For large Gamma's, the variability timescale declines steeply as a function of Gamma (delta T proportional to Gamma(-4.05 +/- 0.64)). Evidence is also presented for an intriguing correlation between the peak times, t(p), of the afterglow emission and the prompt emission variability timescale.

引用

页数：6

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