Rapid spin deceleration of magnetized protoneutron stars via asymmetric neutrino emission

Tomoyuki Maruyama, Jun Hidaka, Toshitaka Kajino, Nobutoshi Yasutake, Takami Kuroda, Tomoya Takiwaki, Myung-Ki Cheoun, Chung-Yeol Ryu, and Grant J. Mathews

Phys. Rev. C 89, 035801 – Published 3 March 2014

Abstract

We estimate the maximum possible contribution to the early spin deceleration of protoneutron stars because of asymmetric neutrino absorption. We calculate the neutrino scattering in the context of a fully relativistic mean field theory and estimate for the first time the spin deceleration of neutron stars because of asymmetric neutrino absorption in a toroidal magnetic field configuration. We find that the deceleration can be much larger for asymmetric neutrino absorption in a toroidal magnetic field than the braking due to magnetic dipole radiation. Nevertheless, the effect is estimated to be less than the angular momentum loss due to the transport of magnetically locked material in the neutrino energized wind.

Received 25 January 2013
Revised 9 August 2013

DOI:https://doi.org/10.1103/PhysRevC.89.035801

Authors & Affiliations

Tomoyuki Maruyama^1,2, Jun Hidaka², Toshitaka Kajino^2,3, Nobutoshi Yasutake⁴, Takami Kuroda², Tomoya Takiwaki², Myung-Ki Cheoun^2,5, Chung-Yeol Ryu⁶, and Grant J. Mathews⁷

¹College of Bioresource Sciences, Nihon University, Fujisawa 252-8510, Japan
²National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
³Department of Astronomy, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
⁴Department of Physics, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino, Chiba 275-0023, Japan
⁵Department of Physics, Soongsil University, Seoul 156-743, Korea
⁶General Education Curriculum Center, Hanyang University, Seoul 133-791, Korea
⁷Department of Physics, Center of Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA

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Issue

Vol. 89, Iss. 3 — March 2014

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Physical Review C

covering nuclear physics