Core-Collapse Supernovae and Neutron Star Kicks
نویسنده
چکیده
Recent observations have revealed many new puzzles related to core-collapse supernovae, including the formation of magnetars and black holes and their possible GRB connections. We review our current understanding of the origin of pulsar kicks and supernova asymmetry. It is argued that neutron star kicks are intimately connected to the other fundamental parameters of young neutron stars, such as the initial spin and magnetic field strength.
منابع مشابه
Theoretical support for the hydrodynamic mechanism of pulsar kicks
The collapse of a massive star’s core, followed by a neutrino-driven, asymmetric supernova explosion, can naturally lead to pulsar recoils and neutron star kicks. Here, we present a two-dimensional, radiationhydrodynamic simulation in which core collapse leads to significant acceleration of a fully formed, nascent neutron star via an induced, neutrino-driven explosion. During the explosion, an ...
متن کاملFurther Evidence for the Bimodal Distribution of Neutron-star Masses
We use a collection of 14 well-measured neutron-star masses to strengthen the case that a substantial fraction of these neutron stars were formed via electron-capture (e-capture) supernovae (SNe) as opposed to Fe corecollapse SNe. The e-capture SNe are characterized by lower resultant gravitational masses and smaller natal kicks, leading to lower orbital eccentricities when the e-capture SN has...
متن کاملLate-Time Convection in the Collapse of a 23 Solar Mass Star
The results of a 3-dimensional SNSPH simulation of the core collapse of a 23M⊙ star are presented. This simulation did not launch an explosion until over 600ms after collapse, allowing an ideal opportunity to study the evolution and structure of the convection below the accretion shock to late times. This late-time convection allows us to study several of the recent claims in the literature abo...
متن کاملNeutron star mergers versus core-collapse supernovae as dominant r-process sites in the early Galaxy
The astrophysical nature of r-process sites is a long standing mystery and many probable sources have been suggested in the past, among them lower-mass core-collapse supernovae (in the range 8 − 10M⊙), highermass core-collapse supernovae (with masses ≥ 20M⊙) and neutron star mergers. In this work, we present a detailed inhomogeneous chemical evolution study that considers for the first time neu...
متن کاملNeutron Star Kicks from Asymmetric Collapse
Many neutron stars are observed to be moving with spatial velocities, in excess of 500 km s. A number of mechanisms have been proposed to give neutron stars these high velocities. One of the leading classes of models proposed invokes asymmetries in the core of a massive star just prior to collapse. These asymmetries grow during the collapse, causing the resultant supernova to also be asymmetric...
متن کامل