TY - JOUR
T1 - A core-collapse supernova model for the extremely luminous type Ic supernova 2007bi
T2 - An alternative to the pair-instability supernova model
AU - Moriya, Takashi
AU - Tominaga, Nozomu
AU - Tanaka, Masaomi
AU - Maeda, Keiichi
AU - Nomoto, Ken'Ichi
PY - 2010
Y1 - 2010
N2 - We present a core-collapse supernova (SN) model for the extremely luminous Type Ic SN 2007bi. By performing numerical calculations of hydrodynamics, nucleosynthesis, and radiation transport, we find that SN 2007bi is consistent with the core-collapse SN explosion of a 43 M ⊙ carbon and oxygen core obtained from the evolution of a progenitor star with a main-sequence mass of 100 M ⊙ and metallicity of Z = Z ⊙/200, from which its hydrogen and helium envelopes are artificially stripped. The ejecta mass and the ejecta kinetic energy of the models are 40 M ⊙ and 3.6 × 1052 erg. The ejected 56Ni mass is as large as 6.1 M ⊙, which results from the explosive nucleosynthesis with large explosion energy. We also confirm that SN 2007bi is consistent with a pair-instability SN model as has recently been claimed. We show that the earlier light-curve data can discriminate between the models for such luminous SNe.
AB - We present a core-collapse supernova (SN) model for the extremely luminous Type Ic SN 2007bi. By performing numerical calculations of hydrodynamics, nucleosynthesis, and radiation transport, we find that SN 2007bi is consistent with the core-collapse SN explosion of a 43 M ⊙ carbon and oxygen core obtained from the evolution of a progenitor star with a main-sequence mass of 100 M ⊙ and metallicity of Z = Z ⊙/200, from which its hydrogen and helium envelopes are artificially stripped. The ejecta mass and the ejecta kinetic energy of the models are 40 M ⊙ and 3.6 × 1052 erg. The ejected 56Ni mass is as large as 6.1 M ⊙, which results from the explosive nucleosynthesis with large explosion energy. We also confirm that SN 2007bi is consistent with a pair-instability SN model as has recently been claimed. We show that the earlier light-curve data can discriminate between the models for such luminous SNe.
KW - Gamma-ray burst: general
KW - Supernovae: general
KW - Supernovae: individual (SN 2007bi SN 2006gy)
UR - http://www.scopus.com/inward/record.url?scp=77953978724&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953978724&partnerID=8YFLogxK
U2 - 10.1088/2041-8205/717/2/L83
DO - 10.1088/2041-8205/717/2/L83
M3 - Article
AN - SCOPUS:77953978724
VL - 717
SP - L83-L86
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 2 PART 2
ER -