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OPTICAL TRANSIENTS POWERED BY MAGNETARS: DYNAMICS, LIGHT CURVES, AND TRANSITION TO THE NEBULAR PHASE
Wang, Ling-Jun1,2,3; Wang, S. Q.2,3; Dai, Z. G.2,3; Xu, Dong1; Han, Yan-Hui1; Wu, X. F.4,5; Wei, Jian-Yan1
2016-04-10
Source PublicationASTROPHYSICAL JOURNAL
Volume821Issue:1
AbstractMillisecond magnetars can be formed via several channels: core collapse of massive stars, accretion-induced collapse of white dwarfs (WDs), double WD mergers, double neutron star (NS) mergers, and WD- NS mergers. Because the mass of ejecta from these channels could be quite different, their light curves are also expected to be diverse. We evaluate the dynamic evolution of optical transients powered by millisecond magnetars. We find that the magnetar with a short spin-down timescale converts its rotational energy mostly into the kinetic energy of the transient, while the energy of a magnetar with a long spin-down timescale goes into radiation of the transient. This leads us to speculate that hypernovae could be powered by magnetars with short spin-down timescales. At late times the optical transients will gradually evolve into a nebular phase because of the photospheric recession. We treat the photosphere and nebula separately because their radiation mechanisms are different. In some cases the ejecta could be light enough that the magnetar can accelerate it to a relativistic speed. It is well known that the peak luminosity of a supernova (SN) occurs when the luminosity is equal to the instantaneous energy input rate, as shown by Arnett. We show that photospheric recession and relativistic motion can modify this law. The photospheric recession always leads to a delay of the peak time t(pk) relative to the time t(x) at which the SN luminosity equals the instantaneous energy input rate. Relativistic motion, however, may change this result significantly.
KeywordRadiation Mechanisms: Thermal Stars: Neutron Supernovae: General
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/821/1/22
WOS KeywordGAMMA-RAY BURSTS ; ACCRETION-INDUCED COLLAPSE ; COMPACT OBJECT MERGERS ; I SUPER-NOVAE ; NEUTRON-STAR ; SUPERLUMINOUS SUPERNOVAE ; WHITE-DWARFS ; MILLISECOND PULSARS ; R-PROCESS ; ANALYTIC SOLUTIONS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000373809000022
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16187
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China
2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210008, Jiangsu, Peoples R China
3.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
5.Chinese Acad Sci, Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Ling-Jun,Wang, S. Q.,Dai, Z. G.,et al. OPTICAL TRANSIENTS POWERED BY MAGNETARS: DYNAMICS, LIGHT CURVES, AND TRANSITION TO THE NEBULAR PHASE[J]. ASTROPHYSICAL JOURNAL,2016,821(1).
APA Wang, Ling-Jun.,Wang, S. Q..,Dai, Z. G..,Xu, Dong.,Han, Yan-Hui.,...&Wei, Jian-Yan.(2016).OPTICAL TRANSIENTS POWERED BY MAGNETARS: DYNAMICS, LIGHT CURVES, AND TRANSITION TO THE NEBULAR PHASE.ASTROPHYSICAL JOURNAL,821(1).
MLA Wang, Ling-Jun,et al."OPTICAL TRANSIENTS POWERED BY MAGNETARS: DYNAMICS, LIGHT CURVES, AND TRANSITION TO THE NEBULAR PHASE".ASTROPHYSICAL JOURNAL 821.1(2016).
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