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Article: Could the compact remnant of SN 1987A be a quark star?

TitleCould the compact remnant of SN 1987A be a quark star?
Authors
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X/
Citation
The Astrophysical Journal, 2009, v. 695 n. 1, p. 732-746 How to Cite?
AbstractThe standard model for Type II supernovae explosions, confirmed by the detection of neutrinos emitted during the supernova explosion, predicts the formation of a compact object, usually assumed to be a neutron star. However, the lack of detection of a neutron star or pulsar formed in the SN 1987A still remains an unsolved mystery. In this paper, we suggest that the newly formed neutron star at the center of SN 1987A may undergo a phase transition after the neutrino trapping timescale (∼10 s). Consequently the compact remnant of SN 1987A may be a strange quark star, which has a softer equation of state than that of neutron star matter. Such a phase transition can induce stellar collapse and result in large amplitude stellar oscillations.We use a three-dimensional Newtonian hydrodynamic code to study the time evolution of the temperature and density at the neutrinosphere. Extremely intense pulsating neutrino fluxes, with submillisecond period and with neutrino energy (greater than 30 MeV), can be emitted because the oscillations of the temperature and density are out of phase almost 180◦. If this is true we predict that the current X-ray emission from the compact remnant of SN 1987A will be lower than 1034 erg s−1, and it should be a thermal bremsstrahlung spectrum for a bare strange star with a surface temperature of around ∼107 K.
Persistent Identifierhttp://hdl.handle.net/10722/59638
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChan, TCen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorHarko, TCen_HK
dc.contributor.authorLau, HKen_HK
dc.contributor.authorLin, LMen_HK
dc.contributor.authorSuen, WMen_HK
dc.contributor.authorTian, Xen_HK
dc.date.accessioned2010-05-31T03:54:16Z-
dc.date.available2010-05-31T03:54:16Z-
dc.date.issued2009en_HK
dc.identifier.citationThe Astrophysical Journal, 2009, v. 695 n. 1, p. 732-746en_HK
dc.identifier.issn0004-637Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/59638-
dc.description.abstractThe standard model for Type II supernovae explosions, confirmed by the detection of neutrinos emitted during the supernova explosion, predicts the formation of a compact object, usually assumed to be a neutron star. However, the lack of detection of a neutron star or pulsar formed in the SN 1987A still remains an unsolved mystery. In this paper, we suggest that the newly formed neutron star at the center of SN 1987A may undergo a phase transition after the neutrino trapping timescale (∼10 s). Consequently the compact remnant of SN 1987A may be a strange quark star, which has a softer equation of state than that of neutron star matter. Such a phase transition can induce stellar collapse and result in large amplitude stellar oscillations.We use a three-dimensional Newtonian hydrodynamic code to study the time evolution of the temperature and density at the neutrinosphere. Extremely intense pulsating neutrino fluxes, with submillisecond period and with neutrino energy (greater than 30 MeV), can be emitted because the oscillations of the temperature and density are out of phase almost 180◦. If this is true we predict that the current X-ray emission from the compact remnant of SN 1987A will be lower than 1034 erg s−1, and it should be a thermal bremsstrahlung spectrum for a bare strange star with a surface temperature of around ∼107 K.-
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X/en_HK
dc.relation.ispartofThe Astrophysical Journalen_HK
dc.rightsThe Astrophysical Journal. Copyright © Institute of Physics Publishing, Inc.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleCould the compact remnant of SN 1987A be a quark star?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=695&spage=732&epage=746&date=2009&atitle=Could+the+compact+remnant+of+SN+1987A+be+a+quark+star?en_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.emailHarko, TC: harko@HKUCC.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1088/0004-637X/695/1/732-
dc.identifier.hkuros155276en_HK
dc.identifier.isiWOS:000264779500060-

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