Astronomy and Astrophysics – Astronomy
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999astl...25..307a&link_type=abstract
Astronomy Letters, Volume 25, Issue 5, May 1999, pp.307-317
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The collapse of a 1.4 M_solar iron stellar core and a 2 M_solar iron-oxygen core is computed by using 1D models. The P rho^{1+1/n} polytropes with n = 3 were chosen as the initial models. The equation of state takes into account photon equilibrium radiation, a mixture of Fermi gases of free nucleons and ideal gases of (Fe, He) nuclei in equilibrium relative to nuclear reactions, and an electron-positron gas. The problem includes the transfer equations for electron neutrinos and antineutrinos. We allow for the absorption and emission of neutrinos and antineutrinos which involve free nucleons and nuclei. The solution yielded neutrino light curves. The computed light curves exhibit narrow peaks with characteristic widths of approximately 10 ms. A constraint on the electron-neutrino mass (less than 4 eV) can thus be placed when short bursts of radiation are recorded during observations. Part of the energy of neutrino radiation is absorbed by the stellar core envelope: 3.6 x 1050 and 1.7 x 1050 erg for the 1.4 M_solar and 2 M_solar models, respectively. We also compute the collapse of a 2 M_solar stellar core with rapid initial rigid rotation with the averaging of the centrifugal force over the solid angle. The formation of a rapidly rotating neutron star in the final state points to the possibility of system fragmentation during the collapse.
No associations
LandOfFree
Computing the collapse of iron-oxygen stellar cores with allowance for the absorption and emission of electron neutrinos and antineutrinos 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 Computing the collapse of iron-oxygen stellar cores with allowance for the absorption and emission of electron neutrinos and antineutrinos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computing the collapse of iron-oxygen stellar cores with allowance for the absorption and emission of electron neutrinos and antineutrinos will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1124523