5 papers
Estimation of the detectability of optical orphan afterglows
Y. C. Zou, X. F. Wu, Z. G. Dai
By neglecting sideways expansion of gamma-ray burst (GRB) jets and assuming their half-opening angle distribution, we estimate the detectability of orphan optical afterglows. This…
Early Afterglows in Wind Environments Revisited
Y. C. Zou, X. F. Wu, Z. G. Dai
When a cold shell sweeps up the ambient medium, a forward shock and a reverse shock will form. We analyze the reverse-forward shocks in a wind environment, including their dynamics…
Testing Gamma-Ray Burst Jet Structure with the Distribution of Gamma-Ray Energy Release
L. Xu, X. F. Wu, Z. G. Dai
We present a general method for testing gamma-ray burst (GRB) jet structure and carry out a comprehensive analysis about the prevalent jet structure models. According to the jet an…
Rebrightening of XRF 030723: further evidence for a two-component jet in gamma-ray burst
Y. F. Huang, X. F. Wu, Z. G. Dai +2
Optical afterglows from two-component jets under various configurations are investigated numerically. Generally, the light curve is characterized by a rapid rebrightening when the…
GRB 030226 in a Density-Jump Medium
Z. G. Dai, X. F. Wu
We present an explanation for the unusual temporal feature of the GRB 030226 afterglow. The R-band afterglow of this burst faded as ~ t^{-1.2} in ~ 0.2 days after the burst, rebrig…