### Abstract

Systematic numerical simulations have been carried out systematically in order to clarify the effect of rotation on the dynamics of core collapse in the supernova explosions. We have utilized a simple phenomenological equation of state with a polytropic form to approximate the complicated microphysics, and we have not solved neutrino transport, either. The infalling matter is found to be clearly divided into two parts, one of which is the inner core contracting subsonically, and the other is the outer core falling supersonically as in the spherically symmetric collapse. The inner core becomes more massive and deformed as the rotational energy increases or as the degree of the differential rotation becomes greater. On the other hand, it is also clear that the explosion energy monotonically decreases as the rotational energy increases or as the degree of differential rotation becomes greater. This is because the centrifugal force prevents the inner core from contracting sufficiently and less gravitational energy is available to push the outer core. This feature is insensitive to the degree of neutrino trapping. It is, therefore, concluded that in general rotation of the core has a negative effect on the prompt explosion mechanism.

Original language | English |
---|---|

Pages (from-to) | 268-276 |

Number of pages | 9 |

Journal | Astrophysical Journal |

Volume | 434 |

Issue number | 1 |

Publication status | Published - 1994 Oct 10 |

Externally published | Yes |

### Fingerprint

### Keywords

- Methods: numerical
- Stars: rotation
- Supernovae: general

### ASJC Scopus subject areas

- Space and Planetary Science

### Cite this

*Astrophysical Journal*,

*434*(1), 268-276.

**Numerical study of rotating core collapse in supernova explosions.** / Yamada, Shoichi; Sato, Katsuhiko.

Research output: Contribution to journal › Article

*Astrophysical Journal*, vol. 434, no. 1, pp. 268-276.

}

TY - JOUR

T1 - Numerical study of rotating core collapse in supernova explosions

AU - Yamada, Shoichi

AU - Sato, Katsuhiko

PY - 1994/10/10

Y1 - 1994/10/10

N2 - Systematic numerical simulations have been carried out systematically in order to clarify the effect of rotation on the dynamics of core collapse in the supernova explosions. We have utilized a simple phenomenological equation of state with a polytropic form to approximate the complicated microphysics, and we have not solved neutrino transport, either. The infalling matter is found to be clearly divided into two parts, one of which is the inner core contracting subsonically, and the other is the outer core falling supersonically as in the spherically symmetric collapse. The inner core becomes more massive and deformed as the rotational energy increases or as the degree of the differential rotation becomes greater. On the other hand, it is also clear that the explosion energy monotonically decreases as the rotational energy increases or as the degree of differential rotation becomes greater. This is because the centrifugal force prevents the inner core from contracting sufficiently and less gravitational energy is available to push the outer core. This feature is insensitive to the degree of neutrino trapping. It is, therefore, concluded that in general rotation of the core has a negative effect on the prompt explosion mechanism.

AB - Systematic numerical simulations have been carried out systematically in order to clarify the effect of rotation on the dynamics of core collapse in the supernova explosions. We have utilized a simple phenomenological equation of state with a polytropic form to approximate the complicated microphysics, and we have not solved neutrino transport, either. The infalling matter is found to be clearly divided into two parts, one of which is the inner core contracting subsonically, and the other is the outer core falling supersonically as in the spherically symmetric collapse. The inner core becomes more massive and deformed as the rotational energy increases or as the degree of the differential rotation becomes greater. On the other hand, it is also clear that the explosion energy monotonically decreases as the rotational energy increases or as the degree of differential rotation becomes greater. This is because the centrifugal force prevents the inner core from contracting sufficiently and less gravitational energy is available to push the outer core. This feature is insensitive to the degree of neutrino trapping. It is, therefore, concluded that in general rotation of the core has a negative effect on the prompt explosion mechanism.

KW - Methods: numerical

KW - Stars: rotation

KW - Supernovae: general

UR - http://www.scopus.com/inward/record.url?scp=12044252376&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=12044252376&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:12044252376

VL - 434

SP - 268

EP - 276

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

ER -