Signatures of neutrino cooling in the SN1987A scenario
| Autor: | Nissim Illich Fraija, C. G. Bernal, A. M. Hidalgo-Gámez |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Particle physics Astrophysics::High Energy Astrophysical Phenomena Solar neutrino FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Solar neutrino problem Neutron star Neutrino detector Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Measurements of neutrino speed High Energy Physics::Experiment Neutrino Neutrino astronomy Astrophysics - High Energy Astrophysical Phenomena Neutrino oscillation Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 442:239-250 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stu872 |
| Popis: | The neutrino signal from SN1987A confirmed the core-collapse scenario and the possible formation of a neutron star. Although this compact object has eluded all observations, theoretical and numerical developments have allowed a glimpse of the fate of it. In particular, a hypercritical accretion model has been proposed to forecast the accretion of $\sim 0.15 \:\mathrm{M_{\odot}}$ in two hours and the subsequent submergence of the magnetic field in the newborn neutron star. In this paper, we revisit the Chevalier's model in a numerical framework, focusing on the neutrino cooling effect on the supernova fall-back dynamics. For that, using a customized version of the FLASH code, we carry out numerical simulations of the accretion of matter onto the newborn neutron star in order to estimate the size of the neutrino-sphere, the emissivity and luminosity of neutrinos. As a signature of this phase, we estimate the neutrinos expected on SK neutrino experiment and their flavor ratios. This is academically important because, although currently it was very difficult to detect 1.46 thermal neutrinos and their oscillations, these fingerprints are the only viable and reliable way to confirm the hypercritical phase. Perhaps new techniques for detecting neutrino oscillations arise in the near future allowing us to confirm our estimates. Comment: 15 pages, 10 figures. Accepted in MNRAS. Minor changes were introduced |
| Databáze: | OpenAIRE |
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