Evolution of newborn rapidly rotating magnetars: Effects of R-mode and 
fall-back accretion

Wang, Jieshuang; Dai, Zi-Gao

doi:10.1051/0004-6361/201629610

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Evolution of newborn rapidly rotating magnetars: Effects of R-mode and fall-back accretion

MPS-Authors

/persons/resource/persons199535

Wang, Jieshuang
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Wang, J., & Dai, Z.-G. (2017). Evolution of newborn rapidly rotating magnetars: Effects of R-mode and fall-back accretion. Astrophysics & Astronomy, 603: A9. doi:10.1051/0004-6361/201629610.

Cite as: https://hdl.handle.net/21.11116/0000-0000-B627-7

Abstract

In this paper we investigate effects of the r-mode instability on a newborn rapidly-rotating magnetar with fall-back accretion. Such a magnetar could usually occur in core-collapse supernovae and gamma-ray bursts. We find that the magnetar's spin and r-mode evolution are influenced by accretion. If the magnetar is sufficiently spun up to a few milliseconds, gravitational radiation leads to the growth of the r-mode amplitude significantly. The maximum r-mode amplitude reaches an order of similar to 0.001 when the damping due to the growth of a toroidal magnetic field balances the growth of the r-mode amplitude. If such a sufficiently spun-up magnetar was located at a distance less than 1 Mpc, then gravitational waves would be detectable by the Einstein Telescope but would have an extremely low event rate. However, if the spin-up is insufficient, the growth of the r-mode amplitude is mainly due to the accretion torque. In this case, the maximum r-mode amplitude is of the order of similar to 10(-6)-10(-5).