Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-02-19
Nuovo Cim.B121:1207-1222,2006
Astronomy and Astrophysics
Astrophysics
16 pages, 12 figures. To be published in the proceedings of the conference "SWIFT and GRBs: Unveiling the Relativistic Univers
Scientific paper
10.1393/ncb/i2007-10245-6
The connection between the long Gamma Ray Bursts (GRBs) and Type Ic Supernovae (SNe) has revealed interesting diversity. We review the following types of the GRB-SN connection. (1) GRB-SNe: The three SNe all explode with energies much larger than those of typical SNe, thus being called Hypernovae (HNe). They are massive enough for forming black holes. (2) Non-GRB HNe/SNe: Some HNe are not associated with GRBs. (3) XRF-SN: SN 2006aj associated with X-Ray Flash 060218 is dimmer than GRB-SNe and has very weak oxygen lines. Its progenitor mass is estimated to be small enough to form a neutron star rather than a black hole. (4) Non-SN GRB: Two nearby long GRBs were not associated SNe. Such ``dark HNe'' have been predicted in this talk (i.e., just before the discoveries) in order to explain the origin of C-rich (hyper) metal-poor stars. This would be an important confirmation of the Hypernova-First Star connection. We will show our attempt to explain the diversity in a unified manner with the jet-induced explosion model.
Deng Jin-Song
Maeda Kengo
Mazzali Paolo A.
Nomoto Ken
Suzuki Toshiya
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