Astronomy Letters

, Volume 29, Issue 4, pp 205–213 | Cite as

X-ray emission lines in the early afterglows of gamma-ray bursts

  • D. I. Kosenko
  • S. I. Blinnikov
  • K. A. Postnov
  • P. Lundqvist
  • E. I. Sorokina
Article

Abstract

We computed the thermal time-dependent X-ray spectrum of a hot plasma in the vicinity of a gamma-ray burst (GRB). An allowance for time-dependent processes in a hot rarefied plasma is shown to strongly affect the observed spectrum. These computations can give an alternative explanation for the observed X-ray emission lines in the early afterglows of GRBs (e.g., GRB 011211). Our technique allows the GRB collimation angle and the environment clumpiness parameters to be independently constrained.

Key words

gamma-ray bursts X-ray lines 

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Copyright information

© MAIK "Nauka/Interperiodica" 2003

Authors and Affiliations

  • D. I. Kosenko
    • 1
  • S. I. Blinnikov
    • 1
    • 2
  • K. A. Postnov
    • 1
  • P. Lundqvist
    • 3
  • E. I. Sorokina
    • 1
  1. 1.Sternberg Astronomical InstituteMoscowRussia
  2. 2.Institute for Theoretical and Experimental PhysicsMoscowRussia
  3. 3.Stockholm ObservatoryAlbanova, StockholmSweden

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