Details

Autor(en) / Beteiligte

• Mazzali, P. A.
• McFadyen, A. I.
• Woosley, S. E.
• Pian, E.
• Tanaka, M.

Titel

An upper limit to the energy of gamma-ray bursts indicates that GRBs/SNe are powered by magnetars

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2014-09, Vol.443 (1), p.67-71

Ort / Verlag

London: Oxford University Press

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The kinetic energy of supernovae (SNe) accompanied by gamma-ray bursts (GRBs) tends to cluster near 1052 erg, with 2 × 1052 erg an upper limit to which no compelling exceptions are found (assuming a certain degree of asphericity), and it is always significantly larger than the intrinsic energy of the GRB themselves (corrected for jet collimation). This energy is strikingly similar to the maximum rotational energy of a neutron star rotating with period 1 ms. It is therefore proposed that all GRBs associated with luminous SNe are produced by magnetars. GRBs that result from black hole formation (collapsars) may not produce luminous SNe. X-ray flashes, which are associated with less energetic SNe, are produced by neutron stars with weaker magnetic field or lower spin.