2018MNRAS.474.2419G -
Mon. Not. R. Astron. Soc., 474, 2419-2429 (2018/February-3)
Asymmetric core collapse of rapidly rotating massive star.
GILKIS A.
Abstract (from CDS):
Non-axisymmetric features are found in the core collapse of a rapidly rotating massive star, which might have important implications for magnetic field amplification and production of a bipolar outflow that can explode the star, as well as for r-process nucleosynthesis and natal kicks. The collapse of an evolved rapidly rotating MZAMS = 54 M☉ star is followed in three-dimensional hydrodynamic simulations using the FLASH code with neutrino leakage. A rotating proto-neutron star (PNS) forms with a non-zero linear velocity. This can contribute to the natal kick of the remnant compact object. The PNS is surrounded by a turbulent medium, where high shearing is likely to amplify magnetic fields, which in turn can drive a bipolar outflow. Neutron-rich material in the PNS vicinity might induce strong r-process nucleosynthesis. The rapidly rotating PNS possesses a rotational energy of Erot ≳1052 erg. Magnetar formation proceeding in a similar fashion will be able to deposit a portion of this energy later on in the supernova ejecta through a spin-down mechanism. These processes can be important for rare supernovae generated by rapidly rotating progenitors, even though a complete explosion is not simulated in the present study.
Abstract Copyright:
© 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Journal keyword(s):
stars: massive - stars: rotation - supernovae: general
Simbad objects:
2
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2018MNRAS.474.2419G and select 'bookmark this link' or equivalent in the popup menu