Strongest gravitational waves from neutrino oscillationsat supernova core bounce

Abstract

Resonant active-to-active (νa → νa), as well as active-to-sterile (νa → νs) neutrino (ν) oscillations can take place during the core bounce of a supernova collapse. Besides, over this phase, weak magnetism increases antineutrino (ν) mean free paths, and thus its luminosity. Because the oscillation feeds mass-energy into the target ν species, the large mass-squared difference between species (νa → νs) implies a huge amount of energy to be given off as gravitational waves (L GWs ∼ 10 49 erg s −1 ), due to anisotropic but coherent ν flow over the oscillation length. This asymmetric ν-flux is driven by both the spin-magnetic and the universal spin-rotation coupling. The novel contribution of this paper stems from 1) the new computation of the anisotropy parameter α ∼ 0.1 − 0.01, and 2) the use of the tight constraints from neutrino experiments as SNO and KamLAND, and the cosmic probe WMAP, to compute the gravitational-wave emission during neutrino oscillations in supernovae core collapse and bounce. We show that the mass of the sterile neutrino νs that can be resonantly produced during the flavor conversions makes it a good candidate for dark matter as suggested by Fuller et al. (2003). The new spacetime strain thus estimated is still several orders of magnitude larger than those from ν difussion (convection and cooling) or quadrupole moments of neutron star matter. This new feature turns these bursts the more promissing supernova gravitational-wave signal that may be detected by observatories as LIGO, VIRGO, etc., for distances far out to the VIRGO cluster of galaxies.

Sterile neutrinos: The dark side of the light fermions

“…In the event of a nearby supernova, the neutrino kick can produce gravity waves that could be detected by LIGO and LISA [16,251]. These gravity waves can be produced in several ways.…”

“…9. In addition, the neutrino conversion itself may cause gravity waves coming out of the core [252][253][254]251]. The gravitational wave signal from a nearby supernova can be observed by Advanced LIGO or LISA.…”

Neutrino Mass Spectrum from Gravitational Waves Generated by Double Neutrino Spin‐Flip in Supernovae

“…Thus, by using the SN core conditions that are currently admitted (see, for instance, Janka et al . This constraint is on the order of the luminosities estimated in our earlier papers (Mosquera Cuesta 2000Mosquera Cuesta & Fiuza 2004) to compute the GW amplitude from flavor conversions, which were different from the one estimated by ( Loveridge 2004). More remarkable, this analysis means that only $1%Y2% of the total number of L particles may resonantly convert into R particles.…”

“…on the probability of conversion ( Peltoniemi 1992;Mosquera Cuesta 2000Mosquera Cuesta & Fiuza 2004;Loveridge 2004)…”

Pulsar kicks induced by spin flavour oscillations of neutrinos in gravitational fields

“…The results of this paper (as well as Burrows & Hayes 1996; Mosquera Cuesta 2000, 2002; Loveridge 2004; Mosquera Cuesta & Fiuzza 2004, in which pulsar kicks are discussed in relation to gravitational waves) have been obtained in semiclassical approximation, i.e. the gravitational field is described by the classical field equations of general relativity.…”