MULTI-MESSENGER TESTS FOR FAST-SPINNING NEWBORN PULSARS EMBEDDED IN STRIPPED-ENVELOPE SUPERNOVAE

Kazumi Kashiyama, Kohta Murase, Imre Bartos, Kenta Kiuchi, Raffaella Margutti

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Fast-spinning strongly magnetized newborn neutron stars (NSs), including nascent magnetars, are popularly implemented as the engine of luminous stellar explosions. Here, we consider the scenario that they power various stripped-envelope (SE) supernovae (SNe), not only superluminous SNe Ic but also broad-line (BL) SNe Ibc and possibly some ordinary SNe Ibc. This scenario is also motivated by the hypothesis that Galactic magnetars largely originate from fast-spinning NSs as remnants of SE SNe. By consistently modeling the energy injection from magnetized wind and 56Ni decay, we show that proto-NSs with ≳10 ms rotation and a poloidal magnetic field of Bdip ≳ 5 × 1014 G can be harbored in ordinary SNe Ibc. On the other hand, millisecond proto-NSs can solely power BL SNe Ibc if they are born with Bdip ≳ 5 × 1014 G and superluminous SNe Ic with Bdip ≳ 1013 G. Then, we study how multi-messenger emission can be used to discriminate such pulsar-driven SN models from other competitive scenarios. First, high-energy X-ray and gamma-ray emission from embryonic pulsar wind nebulae can probe the underlying newborn pulsar. Follow-up observations of SE SNe using NuSTAR∼50-100 after the explosion are strongly encouraged for nearby objects. We also discuss possible effects of gravitational waves (GWs) on the spin-down of proto-NSs. If millisecond proto-NSs with Bdip < a few × 1013 G emit GWs through, e.g., non-axisymmetric rotation deformed by the inner toroidal fields of Bt ≳ 106 G, the GW signal can be detectable from ordinary SNe Ibc in the Virgo cluster by Advanced LIGO, Advanced Virgo, and KAGRA.

Original languageEnglish (US)
Article number94
JournalAstrophysical Journal
Volume818
Issue number1
DOIs
StatePublished - Feb 10 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'MULTI-MESSENGER TESTS FOR FAST-SPINNING NEWBORN PULSARS EMBEDDED IN STRIPPED-ENVELOPE SUPERNOVAE'. Together they form a unique fingerprint.

  • Cite this