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Article: Relativistic mass ejecta from phase-transition-induced collapse of neutron stars
Title | Relativistic mass ejecta from phase-transition-induced collapse of neutron stars | ||||||||||||
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Authors | |||||||||||||
Keywords | Cosmological neutrinos Gamma ray bursts theory Neutron stars | ||||||||||||
Issue Date | 2009 | ||||||||||||
Publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAP | ||||||||||||
Citation | Journal Of Cosmology And Astroparticle Physics, 2009, v. 2009 n. 9 How to Cite? | ||||||||||||
Abstract | We study the dynamical evolution of a phase-transition-induced collapse neutron star to a hybrid star, which consists of a mixture of hadronic matter and strange quark matter. The collapse is triggered by a sudden change of equation of state, which result in a large amplitude stellar oscillation. The evolution of the system is simulated by using a 3D Newtonian hydrodynamic code with a high resolution shock capture scheme. We find that both the temperature and the density at the neutrinosphere are oscillating with acoustic frequency. However, they are nearly 180° out of phase. Consequently, extremely intense, pulsating neutrino/antineutrino fluxes will be emitted periodically. Since the energy and density of neutrinos at the peaks of the pulsating fluxes are much higher than the non-oscillating case, the electron/positron pair creation rate can be enhanced dramatically. Some mass layers on the stellar surface can be ejected by absorbing energy of neutrinos and pairs. These mass ejecta can be further accelerated to relativistic speeds by absorbing electron/positron pairs, created by the neutrino and antineutrino annihilation outside the stellar surface. The possible connection between this process and the cosmological Gamma-ray Bursts is discussed. © 2009 IOP Publishing Ltd and SISSA. | ||||||||||||
Persistent Identifier | http://hdl.handle.net/10722/91873 | ||||||||||||
ISSN | 2023 Impact Factor: 5.3 2023 SCImago Journal Rankings: 0.932 | ||||||||||||
ISI Accession Number ID |
Funding Information: We thank M. C. Chu, Z. G. Dai, P. Haensel, T. Lu, K. B. Luk, V. V. Usov and K. W. Wu for useful discussion, and the anonymous referee for very useful suggestions. KSC and TH are supported by the GRF Grants of the Government of the Hong Kong SAR under HKU7013/ 06P and HKU7025/ 07P respectively. YHF is supported by the National Science Foundation of China (grant 10625313), and the National Basic Research Program of China (grant 2009CB824800). LML is supported by the Hong Kong Research Grants Council (Grant No. CUHK4018/ 07P) and the direct grant (Project IDs: 2060330) from the Chinese University of Hong Kong. The computations were performed on the Computational Grid of the Chinese University of Hong Kong and the High Performance Computing Cluster of the University of Hong Kong. | ||||||||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cheng, KS | en_HK |
dc.contributor.author | Harko, T | en_HK |
dc.contributor.author | Huang, YF | en_HK |
dc.contributor.author | Lin, LM | en_HK |
dc.contributor.author | Suen, WM | en_HK |
dc.contributor.author | Tian, XL | en_HK |
dc.date.accessioned | 2010-09-17T10:29:05Z | - |
dc.date.available | 2010-09-17T10:29:05Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | Journal Of Cosmology And Astroparticle Physics, 2009, v. 2009 n. 9 | en_HK |
dc.identifier.issn | 1475-7516 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/91873 | - |
dc.description.abstract | We study the dynamical evolution of a phase-transition-induced collapse neutron star to a hybrid star, which consists of a mixture of hadronic matter and strange quark matter. The collapse is triggered by a sudden change of equation of state, which result in a large amplitude stellar oscillation. The evolution of the system is simulated by using a 3D Newtonian hydrodynamic code with a high resolution shock capture scheme. We find that both the temperature and the density at the neutrinosphere are oscillating with acoustic frequency. However, they are nearly 180° out of phase. Consequently, extremely intense, pulsating neutrino/antineutrino fluxes will be emitted periodically. Since the energy and density of neutrinos at the peaks of the pulsating fluxes are much higher than the non-oscillating case, the electron/positron pair creation rate can be enhanced dramatically. Some mass layers on the stellar surface can be ejected by absorbing energy of neutrinos and pairs. These mass ejecta can be further accelerated to relativistic speeds by absorbing electron/positron pairs, created by the neutrino and antineutrino annihilation outside the stellar surface. The possible connection between this process and the cosmological Gamma-ray Bursts is discussed. © 2009 IOP Publishing Ltd and SISSA. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAP | en_HK |
dc.relation.ispartof | Journal of Cosmology and Astroparticle Physics | en_HK |
dc.subject | Cosmological neutrinos | en_HK |
dc.subject | Gamma ray bursts theory | en_HK |
dc.subject | Neutron stars | en_HK |
dc.title | Relativistic mass ejecta from phase-transition-induced collapse of neutron stars | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Cheng, KS: hrspksc@hkucc.hku.hk | en_HK |
dc.identifier.email | Harko, T: harko@hkucc.hku.hk | en_HK |
dc.identifier.authority | Cheng, KS=rp00675 | en_HK |
dc.identifier.authority | Harko, T=rp01333 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/1475-7516/2009/09/007 | en_HK |
dc.identifier.scopus | eid_2-s2.0-70350726458 | en_HK |
dc.identifier.hkuros | 166039 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-70350726458&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 2009 | en_HK |
dc.identifier.issue | 9 | en_HK |
dc.identifier.isi | WOS:000270659900007 | - |
dc.publisher.place | United Kingdom | en_HK |
dc.identifier.scopusauthorid | Cheng, KS=9745798500 | en_HK |
dc.identifier.scopusauthorid | Harko, T=7006485783 | en_HK |
dc.identifier.scopusauthorid | Huang, YF=7501574835 | en_HK |
dc.identifier.scopusauthorid | Lin, LM=8388053000 | en_HK |
dc.identifier.scopusauthorid | Suen, WM=7006977947 | en_HK |
dc.identifier.scopusauthorid | Tian, XL=35115757900 | en_HK |
dc.identifier.citeulike | 5708963 | - |
dc.identifier.issnl | 1475-7516 | - |