Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010astl...36..721i&link_type=abstract
Astronomy Letters, Volume 36, Issue 10, pp.721-737
Astronomy and Astrophysics
Astronomy
2
Gravitational Collapse, Neutrino Emission, Quasi-One-Dimensional Hydrodynamics, Scintillation Detectors, Sn 1987A, Self-Similar Solutions, Rotating Collapsar
Scientific paper
A quasi-one-dimensional hydrodynamic model for the collapse of a rotating iron stellar core is used to determine the neutrino spectra in the limiting case of total transparency to neutrino emission (without any deposition effect). The derived spectra allow the previously constructed spectra used to theoretically estimate the number of events in the LSD underground neutrino detector from SN 1987A to be refined. At typical iron stellar core parameters, including those that characterize the core rotation specified in the initial conditions of the model, this number has turned out to be 1.6, which is close in order of magnitude to its experimental value of 5. Here, we compare in detail these results by assuming that the transparency of the collapsing iron core itself could be attributable to the development of its three-dimensional dynamical instability—the subject of future theoretical studies. The physical formulation of the problem coincides closely with the collapse model proposed in our previous paper, where the above number of events turned out to be 0.5. We have confirmed the previously published results with regard to the neutrino spectra, including the significant superiority of electron neutrinos over electron antineutrinos in them. The hydrostatically equilibrium configuration (a rotating collapsar) obtained in our model calculation is discussed in comparison with self-similar solutions that are close in physical formulation of the problem. This result seems a nontrivial consequence of the included rotation effects that hinder nonstop collapse established in the mentioned self-similar solutions.
Imshennik Vladimir S.
Molokanov V. O.
No associations
LandOfFree
Gravitational collapse of a rotating iron stellar core: The limiting case of transparency to neutrino emission 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 Gravitational collapse of a rotating iron stellar core: The limiting case of transparency to neutrino emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational collapse of a rotating iron stellar core: The limiting case of transparency to neutrino emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1118521