Testing a stochastic acceleration model of pulsar wind nebulae: early evolution of a wind nebula associated with SN 1986J

被引：5

作者：

Tanaka, Shuta J. ^{[1
,2
]}

Kashiyama, Kazumi ^{[3
,4
]}

机构：

[1] Aoyama Gakuin Univ, Dept Phys Sci, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 2525258, Japan

[2] Osaka Univ, Grad Sch Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[3] Tohoku Univ, Astron Inst, Grad Sch Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan

[4] Univ Tokyo, Kavli Inst Phys & Math Universe, WPI, Kavli IPMU, Kashiwa, Chiba 2778582, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 525卷 / 02期

关键词：

acceleration of particles; radiation mechanisms: non-thermal; pulsars: general; supernovae: individual (SN 1986J); ISM: individual objects (Crab Nebula); ISM: supernova remnants; COMPACT RADIO COMPONENT; X-RAY-EMISSION; CRAB-NEBULA; GAMMA-RAY; SPECTRAL EVOLUTION; NEUTRINO BURST; SIMULATIONS; CONFINEMENT; SUPERNOVAE; SEARCH;

D O I：

10.1093/mnras/stad2504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Over 3000 pulsars have been discovered, but none have been confirmed to be younger than a few hundred years. Observing a pulsar after a supernova explosion will help us understand the properties of newborn ones, including their capability to produce gamma-ray bursts and fast radio bursts. Here, the possible youngest pulsar wind nebula (PWN) at the centre of the SN 1986J remnant is studied. We demonstrate that the 5 GHz flux of 'PWN 1986J', increasing with time, is consistent with a stochastic acceleration model of PWNe developed to explain the flat radio spectrum of the Crab Nebula. We obtain an acceleration time-scale of electrons/positrons and a decay time-scale of the turbulence responsible for the stochastic acceleration as about 10 yr and 70 yr, respectively. Our findings suggest that efficient stochastic acceleration and rising radio/submm light curves are characteristic signatures of the youngest PWNe. Follow-up ALMA observations of decades-old supernovae within a few tens of Mpc, including SN 1986J, are encouraged to reveal the origin of the flat radio spectrum of PWNe.

引用

页码：2750 / 2757

页数：8

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