AAS 206th Meeting, 29 May - 2 June 2005
Session 29 X-Ray Flashes
Topical Session, Tuesday, 2:30-4:00pm, 4:15-6:00pm, May 31, 2005, 102 E

Previous   |   Session 29   |   Next

[29.07] Relativistic Beaming Model of X-Ray Flashes and GRBs

R. Yamazaki (Osaka University, Japan), K. Toma (Kyoto University, Japan), K. Ioka (Penn State University), T. Nakamura (Kyoto University, Japan)

X-ray flashes (XRFs) occur at cosmological distances and are similar to, but softer than, classical (long) gamma-ray bursts (GRBs). Various observational facts derived by BeppoSAX and HETE-2 strongly suggest that they are the same phenomenon. We propose a possible theoretical unified model of XRFs. GRBs arise from relativistic jets directed toward us. Therefore, there should be instances in which we observe the relativistic jets from an off-axis viewing angle. For that case, relativistic kinematics tells us that if the viewing angle is larger than the collimation angle of the jet, we will obtain the observational characteristics of X-ray flashes.

If you would like more information about this abstract, please follow the link to http://vega.ess.sci.osaka-u.ac.jp/~ryo/index-e.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: ryo@vega.ess.sci.osaka-u.ac.jp

Previous   |   Session 29   |   Next

Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.