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Collapsar




It is believed that collapsars are the cause of long (> 2 seconds) Gamma-ray Bursts , since powerful energy jets would be created along the rotation axis of the Black Hole , creating a burst of high-energy radiation to an observer whose line of sight is along the jet.

A possible example of a collapsar is the Supernova Sn1998bw , which was associated with the Gamma-ray Burst GRB980425 . This was classified as a Type Ic supernova due to its unusual spectral properties in the Radio spectrum, indicating the presence of Relativistic matter. However, it should be noted that Sn1998bw was an unusual supernova, and that GRB980425 was an unusual gamma-ray burst.


SEE ALSO



REFERENCES

  • Stanford E. Woosley "Gamma-ray bursts from stellar mass accretion disks around black holes" ''Astrophysical Journal'', Vol 405, Pages 273-277, March 1993.

  • Tsvi Piran "The Physics of Gamma-Ray Bursts" ''Reviews of Modern Physics'', Vol 76, October 2004