Xu 2009 用能量注入模型解释GRB060729的余辉

主要内容:


精彩摘抄:

文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· arXiv e-print (arXiv:0909.5318)

· References in the article

· Citations to the Article (1) (Citation History)

· Refereed Citations to the Article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Long-term continuous energy injection in the afterglow of GRB 060729
Authors:		Xu, Ming; Huang, Yong-Feng; Lu, Tan
Affiliation:		AA(Department of Astronomy, Nanjing University, Nanjing 210093, China ), AB(Department of Astronomy, Nanjing University, Nanjing 210093, China ), AC(Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China)
Publication:		Research in Astronomy and Astrophysics, Volume 9, Issue 12, pp. 1317-1323 (2009).
Publication Date:		12/2009
Origin:		IOP
DOI:		10.1088/1674-4527/9/12/003
Bibliographic Code:		2009RAA.....9.1317X

Abstract

A long plateau phase and an amazing level of brightness have been observed in the X-ray afterglow of GRB 060729. This peculiar light curve is likely due to long-term energy injection in external shock. Here, we present a detailed numerical study of the energy injection process of magnetic dipole radiation from a strongly magnetized millisecond pulsar and model the multi-band afterglow observations. It is found that this model can successfully explain the long plateaus in the observed X-ray and optical afterglow light curves. The sharp break following the plateaus could be due to the rapid decline of the emission power of the central pulsar. At an even later time (~ 5 × 10 ⁶ s), an obvious jet break appears, which implies a relatively large half opening angle of θ ~ 0.3 for the GRB ejecta. Due to the energy injection, the Lorentz factor of the outflow is still larger than two even at 10⁷ s after the GRB trigger, making the X-ray afterglow of this burst detectable by Chandra even 642 d after the burst.

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)