ALMA and NOEMA constraints on synchrotron nebular emission from embryonic superluminous supernova remnants and radio–gamma-ray connection

Kohta Murase, Conor M.B. Omand, Deanne L. Coppejans, Hiroshi Nagai, Geoffrey C. Bower, Ryan Chornock, Derek B. Fox, Kazumi Kashiyama, Casey Law, Raffaella Margutti, Peter Mészáros

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Fast-rotating pulsars and magnetars have been suggested as the central engines of superluminous supernovae (SLSNe) and fast radio bursts, and this scenario naturally predicts non-thermal synchrotron emission from their nascent pulsar wind nebulae (PWNe). We report results of high-frequency radio observations with ALMA and NOEMA for three SLSNe (SN 2015bn, SN 2016ard, and SN 2017egm), and present a detailed theoretical model to calculate non-thermal emission from PWNe with an age of ∼1-3 yr. We find that the ALMA data disfavours a PWN model motivated by the Crab nebula for SN 2015bn and SN 2017egm, and argue that this tension can be resolved if the nebular magnetization is very high or very low. Such models can be tested by future MeV–GeV gamma-ray telescopes such as AMEGO.

Original languageEnglish (US)
Pages (from-to)44-51
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume508
Issue number1
DOIs
StatePublished - Nov 1 2021

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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