White dwarf spins from low mass stellar evolution models

Abstract

The prediction of the spins of the compact remnants is a fundamental goal of the theory of stellar evolution. Here, we confront the predictions for white dwarf spins from evolutionary models including rotation with observational constraints. We perform stellar evolution calculations for stars in the mass range 1... 3$\mso$, including the physics of rotation, from the zero age main sequence into the TP-AGB stage. We calculate two sets of model sequences, with and without inclusion of magnetic fields. From the final computed models of each sequence, we deduce the angular momenta and rotational velocities of the emerging white dwarfs. While models including magnetic torques predict white dwarf rotational velocities between 2 and 10 km s${}^{-1}$, those from the non-magnetic sequences are found to be one to two orders of magnitude larger, well above empirical upper limits. We find the situation analogous to that in the neutron star progenitor mass range, and conclude that magnetic torques may be required in order to understand the slow rotation of compact stellar remnants in general.

Accepted for A&A Letters

References in corpus (6)

• The Supernova -- Gamma-Ray Burst Connection
• 1E 1547.0-5408: a radio-emitting magnetar with a rotation period of 2 seconds
• On magnetic instabilities and dynamo action in stellar radiation zones
• Binary star progenitors of long gamma-ray bursts
• Rotational mixing in low-mass stars II. Self-consistent models of Pop II RGB stars
• Numerical Simulations of Equatorially-Asymmetric Magnetized Supernovae: Formation of Magnetars and Their Kicks

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