Spatially resolved X-ray study of supernova remnants that host magnetars: Implication of their fossil field origin

Marco Miceli, Jacco Vink, Ping Zhou, Samar Safi-Harb, Marco Miceli

Risultato della ricerca: Articlepeer review

7 Citazioni (Scopus)

Abstract

Magnetars are regarded as the most magnetized neutron stars in the Universe. Aiming to unveil what kinds of stars and supernovae can create magnetars, we have performed a state-of-the-art spatially resolved spectroscopic X-ray study of the supernova remnants (SNRs) Kes 73, RCW 103, and N49, which host magnetars 1E 1841-045, 1E 161348-5055, and SGR 0526-66, respectively. The three SNRs are O- and Ne-enhanced and are evolving in the interstellar medium with densities of >1-2 cm(-3). The metal composition and dense environment indicate that the progenitor stars are not very massive. The progenitor masses of the three magnetars are constrained to be <20 M-circle dot (11-15 M-circle dot for Kes 73, less than or similar to 13 M-circle dot for RCW 103, and similar to 13-17 M-circle dot for N49). Our study suggests that magnetars are not necessarily made from very massive stars, but originate from stars that span a large mass range. The explosion energies of the three SNRs range from 10(50) erg to similar to 2 x10(51) erg, further refuting that the SNRs are energized by rapidly rotating (millisecond) pulsars. We report that RCW 103 is produced by a weak supernova explosion with significant fallback, as such an explosion explains the low explosion energy (10(50)erg), small observed metal masses (M-circle dot similar to 4 x 10(-2) M-circle dot and M-Ne similar to 6 x 10(-3) M-circle dot), and sub-solar abundances of heavier elements such as Si and S. Our study supports the fossil field origin as an important channel to produce magnetars, given the normal mass range (M-ZAMS < 20 M-circle dot) of the progenitor stars, the low-to-normal explosion energy of the SNRs, and the fact that the fraction of SNRs hosting magnetars is consistent with the magnetic OB stars with high fields
Lingua originaleEnglish
pagine (da-a)1-12
Numero di pagine12
RivistaASTRONOMY & ASTROPHYSICS
Volume629
Stato di pubblicazionePublished - 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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