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Beaming Effects in Gamma-Ray Bursts

  • Y. F. Huang
  • T. Lu
  • Z. G. Dai
  • K. S. Cheng
Part of the Astrophysics and Space Science Library book series (ASSL, volume 298)

Abstract

Based on a refined generic dynamical model, we investigate afterglows from jetted gamma-ray burst (GRB) remnants numerically. In the relativistic phase, the light curve break could marginally be seen. However, an obvious break does exist at the transition from the relativistic phase to the non-relativistic phase, which typically occurs at time 10 to 30 days. The break is affected by many parameters, especially by the electron energy fraction (&), and the magnetic energy fraction (math). Implication of orphan afterglow surveys on GRB beaming is investigated. The possible existence of a kind of cylindrical jets is also discussed.

Keywords:

Gamma-ray bursts jets 

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References

  1. Antonelli L.A. et al., 2000, ApJ, 545, L39ADSCrossRefGoogle Scholar
  2. Castro-Tirado A. et al., 1999, Sci, 283, 2069ADSCrossRefGoogle Scholar
  3. Cheng K.S., Huang Y.F., Lu T., 2001, MNRAS, 325, 599 (astro-ph/0102463)ADSCrossRefGoogle Scholar
  4. Dai Z.G. & Gou L.J., 2001, ApJ, 552, 72ADSCrossRefGoogle Scholar
  5. Dai Z.G. & Cheng K.S., 2001, ApJ, 558, L109ADSCrossRefGoogle Scholar
  6. Dar A., 1998, ApJ, 500, L93ADSCrossRefGoogle Scholar
  7. Frontera F. et al., 2000, ApJ, 540, 697ADSCrossRefGoogle Scholar
  8. Gou L.J. et al., 2001, A&A, 368, 464ADSCrossRefGoogle Scholar
  9. Greiner J., Voges W., Boller T., Hartmann D., 1999, A&AS, 138, 441ADSCrossRefGoogle Scholar
  10. Halpern J.P. et al., 2000, ApJ, 543, 697ADSCrossRefGoogle Scholar
  11. Huang Y.F., 2000, astro-ph/0008177Google Scholar
  12. Huang Y.F. Dai Z.G. & Lu T., 1998a, A&A, 336, L69ADSGoogle Scholar
  13. Huang Y.F. Dai Z.G. & Lu T., 1998b, MNRAS, 298, 459ADSCrossRefGoogle Scholar
  14. Huang Y.F. Dai Z.G. & T. Lu, 1999, MNRAS, 309, 513.ADSCrossRefGoogle Scholar
  15. Huang Y.F. et al., 2000a, ApJ, 543, 90 (astro-ph/9910493)ADSCrossRefGoogle Scholar
  16. Huang Y.F. Dai Z.G. & Lu T., 2000b, A&A, 355, L43 (astro-ph/0002433)ADSGoogle Scholar
  17. Huang Y.F. Dai Z.G. & Lu T., 2000c, MNRAS, 316, 943 (astro-ph/0005549)ADSCrossRefGoogle Scholar
  18. Huang Y.F. Dai Z.G., Lu T., 2002a, MNRAS, 332, 735 (astro-ph/0112469)ADSCrossRefGoogle Scholar
  19. Huang Y.F. et al., 2002b, Chinese Astron. Astrophys., acceptedGoogle Scholar
  20. Kulkarni S.R. et al., 1999, Nat, 398, 389ADSCrossRefGoogle Scholar
  21. Mészáros P. & Rees M.J., 1999, MNRAS, 306, L39CrossRefGoogle Scholar
  22. Mészáros P. & Rees M.J., 1999, MNRAS, 306, L39CrossRefGoogle Scholar
  23. Panaitescu A. & Mészáros P., 1999, ApJ, 526, 707ADSCrossRefGoogle Scholar
  24. Ramirez-Ruiz E., Lloyd-Ronning N.M., 2002, New Astronomy, accepted (astro-ph/0203447) Rhoads J., 1997, ApJ, 487, L1Google Scholar
  25. Totani T., Panaitescu A., 2002, ApJ, accepted (astro-ph/0204258)Google Scholar
  26. van Paradijs J., Kouveliotou C. & Wijers R.A.M.J., 2000, ARA&A, 38, 379ADSCrossRefGoogle Scholar
  27. Vanden Berk D.E. et al., 2002, ApJ, in press (astro-ph/0111054)Google Scholar
  28. Zhang B., Mészáros P., 2002, ApJ, 571, 876ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • Y. F. Huang
    • 1
  • T. Lu
    • 1
  • Z. G. Dai
    • 1
  • K. S. Cheng
    • 2
  1. 1.Department of AstronomyNanjing UniversityNanjingChina
  2. 2.Department of Physicsthe University of Hong KongHong Kong, China

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