Echo Emission From Dust Scattering and X-Ray Afterglows of Gamma-Ray Bursts Export

@article{citeulike:4001184, abstract = {We investigate the effect of X-ray echo emission in gamma-ray bursts (GRBs). We find that the echo emission can provide an alternative way of understanding X-ray shallow decays and jet breaks. In particular, a shallow decay followed by a "normal" decay and a further rapid decay of X-ray afterglows can be together explained as being due to the echo from prompt X-ray emission scattered by dust grains in a massive wind bubble around a GRB progenitor. We also introduce an extra temporal break in the X-ray echo emission. By fitting the afterglow light curves, we can measure the locations of the massive wind bubbles, which will bring us closer to finding the mass loss rate, wind velocity, and the age of the progenitors prior to the GRB explosions.}, archivePrefix = {arXiv}, author = {Shao, L. and Dai, Z. G. and Mirabal, N.}, citeulike-article-id = {4001184}, citeulike-linkout-0 = {http://arxiv.org/abs/0711.3800}, citeulike-linkout-1 = {http://arxiv.org/pdf/0711.3800}, day = {24}, eprint = {0711.3800}, keywords = {afterglow, dust, shallow, x-ray}, month = {Nov}, posted-at = {2009-02-03 15:02:14}, priority = {2}, title = {Echo Emission From Dust Scattering and X-Ray Afterglows of Gamma-Ray Bursts}, url = {http://arxiv.org/abs/0711.3800}, year = {2007} }

TY - JOUR ID - citeulike:4001184 L3 - citeulike-article-id:4001184 N2 - We investigate the effect of X-ray echo emission in gamma-ray bursts (GRBs). We find that the echo emission can provide an alternative way of understanding X-ray shallow decays and jet breaks. In particular, a shallow decay followed by a "normal" decay and a further rapid decay of X-ray afterglows can be together explained as being due to the echo from prompt X-ray emission scattered by dust grains in a massive wind bubble around a GRB progenitor. We also introduce an extra temporal break in the X-ray echo emission. By fitting the afterglow light curves, we can measure the locations of the massive wind bubbles, which will bring us closer to finding the mass loss rate, wind velocity, and the age of the progenitors prior to the GRB explosions. TI - Echo Emission From Dust Scattering and X-Ray Afterglows of Gamma-Ray Bursts KW - afterglow KW - dust KW - shallow KW - x-ray AU - Shao, L AU - Dai, ZG AU - Mirabal, N PY - 2007/Nov/24/ UR - http://arxiv.org/abs/0711.3800 ER -