Dark matter sterile neutrinos in stellar collapse: alteration of energy/lepton number transport and a mechanism for supernova explosion enhancement
| dc.creator | Hidaka, Jun | |
| dc.creator | Fuller, George M. | |
| dc.date | 2006-09-15 | |
| dc.date.accessioned | 2026-07-07T10:23:36Z | |
| dc.date.available | 2026-07-07T10:23:36Z | |
| dc.description | We investigate matter-enhanced Mikheyev-Smirnov-Wolfenstein (MSW) active-sterile neutrino conversion in the $ν_e \rightleftharpoons ν_s$ channel in the collapse of the iron core of a pre-supernova star. For values of sterile neutrino rest mass $m_s$ and vacuum mixing angle $θ$ (specifically, $0.5 {\rm keV}< m_s<10 {\rm keV}$ and $\sin^22θ> 5\times{10}^{-12}$) which include those required for viable sterile neutrino dark matter, our one-zone in-fall phase collapse calculations show a significant reduction in core lepton fraction. This would result in a smaller homologous core and therefore a smaller initial shock energy, disfavoring successful shock re-heating and the prospects for an explosion. However, these calculations also suggest that the MSW resonance energy can exhibit a minimum located between the center and surface of the core. In turn, this suggests a post-core-bounce mechanism to enhance neutrino transport and neutrino luminosities at the core surface and thereby augment shock re-heating: (1) scattering-induced or coherent MSW $ν_e\toν_s$ conversion occurs deep in the core, at the first MSW resonance, where $ν_e$ energies are large ($\sim 150$ MeV); (2) the high energy $ν_s$ stream outward at near light speed; (3) they deposit their energy when they encounter the second MSW resonance $ν_s\toν_e$ just below the proto-neutron star surface. | |
| dc.description | 13 pages, 9 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0609425 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0609425 | |
| dc.identifier | Phys.Rev.D74:125015,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.125015 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175892 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Dark matter sterile neutrinos in stellar collapse: alteration of energy/lepton number transport and a mechanism for supernova explosion enhancement | |
| dc.type | text |