English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Rapidly rotating magnetars have been associated with gamma-ray bursts (GRBs)and super-luminous supernovae (SLSNe). Using a suite of 2D magnetohydrodynamicsimulations at fixed neutrino luminosity and a couple of evolutionary modelswith evolving neutrino luminosity and magnetar spin period, we show thatmagnetars are viable central engines for powering GRBs and SLSNe. We alsopresent analytic estimates of the energy outflow rate from the proto-neutronstar (PNS) as a function of polar magnetic field strength $B_0$, PNS angularvelocity $\Omega_{\star}$, PNS radius $R_{\star}$ and mass outflow rate$\dot{M}$. We show that rapidly rotating magnetars with spin periods$P_{\star}\lesssim 4$ ms and polar magnetic field strength $B_0\gtrsim 10^{15}$G can release $10^{50}-5\times 10^{51}$ ergs of energy during the first $\sim2$s of the cooling phase. Based on this result, it is plausible that sustainedenergy injection by magnetars through the relativistic wind phase can powerGRBs. We also show that magnetars with moderate field strengths of $B_0\lesssim5\times 10^{14}$ G do not release a large fraction of their rotational kineticenergy during the cooling phase and hence, are not likely to power GRBs.Although we cannot simulate to times greater than $\sim 3-5$ s after asupernova, we can hypothesize that moderate field strength magnetars canbrighten the supernova light curves by releasing their rotational kineticenergy via magnetic dipole radiation on timescales of days to weeks, sincethese do not expend most of their rotational kinetic energy during the earlycooling phase.

The early evolution of magnetar rotation -- II. Rapidly rotating magnetars: Implications for Gamma-Ray Bursts and Super Luminous Supernovae