New analysis for the correlation between gravitational wave and neutrino detectors during SN1987A

Abstract

Two major problems, still associated with the SN1987A, are: a) the signals observed with the gravitational waves detectors, b) the duration of the collapse. Indeed, a) the sensitivity of the gravitational wave detectors seems to be small for detecting gravitational waves and, b) while some experimental data indicate a duration of order of hours, most theories assume that the collapse develops in a few seconds. Since recent data of the X-ray NuSTAR satellite show a clear evidence of an asymmetric collapse, we have revisited the experimental data recorded by the underground and gravitational wave detectors running during the SN1987A. New evidence is shown that confirms previous results, namely that the data recorded by the gravitational wave detectors running in Rome and in Maryland are strongly correlated with the data of both the Mont Blanc and the Kamiokande detectors, and that the correlation extends over a long period of time (one or two hours) centered at the Mont Blanc time. This result indicates that also Kamiokande detected neutrinos at the Mont Blanc time, and these interactions were not identified because not grouped in a burst.

Relationships among detector signals recorded during events SN1987A and GW170817

“…The most detailed correlation analysis, covering the range from 0h00m to 8h00m UT on 23/02/1987, has been reported in [20]. One of the important results of this work are the correlation curves for the LSD-RGA/MGA and KND-RGA/MGA setup combinations (Fig.…”

Einstein’s Geometrical versus Feynman’s Quantum-Field Approaches to Gravity Physics: Testing by Modern Multimessenger Astronomy

“…Note that the gravitational antenna GEOGRAV observed a signal from SN1987A together with the neutrino signal observed by the Mont Blanc Underground Neutrino Observatory (Amaldi et al, 1987 [223]; Aglietta et al, 1987 [224], Imshennik 2010 [212], and Galeotti & Pizzella 2016 [216]). This has been interpreted by Baryshev 1997 [209] as a possible detection of the scalar gravitational radiation (if the bar changes its length) from the spherical core-collapse of the supernova.…”

“…Rapid rotation with magnetic fields (e.g., [215]) and 3D MGD simulations taking different instabilities into account need to be studied more carefully in future. The true model should also explain such observational properties of the CCSN as two stage collapse and simultaneous burst of gravitational waves and neutrino burst [212] (as it was in the case of SN1987A [216]). However, up to now, athough many different revival mechanisms were considered, there has been no successful model yet, because the problem of CCSN explosion exists at a very fundamental level of the gravity theory.…”

On Manifestation of In-Medium Effects in Neutron Stars and Heavy-Ion Collisions

“…Recently, new arguments have been expressed for that namely two neutrino bursts were measured during 1987A explosion, one delayed respectively the other one by 4.7 h, cf. [26]. The second burst could then be related to the phase transition of the neutron star to the pion condensate state.…”