Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-02-04
Astrophys.J.695:732-746,2009
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
This paper is accepted by ApJ. Contact: Prof. K.S. Cheng (Email: hrspksc@hkucc.hku.hk)
Scientific paper
10.1088/0004-637X/695/1/732
The standard model for Type II supernovae explosion, confirmed by the detection of the neutrinos emitted during the supernova explosion, predicts the formation of a compact object, usually assumed to be a neutron star. However, the lack of the 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 SN1987A may undergo a phase transition after the neutrino trapping time scale (~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 the stellar collapse and result in a 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 (> 30 MeV) can be emitted because the oscillations of the temperature and density are out of phase almost 180 degree. If this is true we predict that the current X-ray emission from the compact remnant of SN 1987A will be lower than 10^34 erg s-1, and it should be a thermal bremsstrahlung spectrum for a bare strange star with surface temperature of around ~10^7 K.
Chan Chuan Tsung
Cheng Kwong Sang
Harko Tiberiu
Lau Hoi Kwan
Lin Lap Ming
No associations
LandOfFree
Could the compact remnant of SN 1987A be a quark star? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Could the compact remnant of SN 1987A be a quark star?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Could the compact remnant of SN 1987A be a quark star? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-553151