arXiv subjects

G. Pagliaroli

Publications and source records attributed to G. Pagliaroli.

21 records · Page 2Linked to original sources

arXiv2008

How much can we learn from SN1987A events? Or: An analysis with a two-Component model for the antineutrino signal

We analyze the data of Kamiokande-II, IMB, Baksan using a parameterized description of the antineutrino emission, that includes an initial phase of intense luminosity. The luminosity curve, the average energy of $\barν_e$ and the astrophysical parameters of the model, derived by fitting the observed events (energies, times and angles) are in reasonable agreement with the generic expectations of the delayed scenario for the explosion.

astro-ph↗

arXiv2008

Analysis of Neutrino Signals from SN1987A

We study SN1987A neutrino events through a likelihood analysis with one-component (cooling) and two-component (accretion and cooling) emission model. We show that there is a 3.2 sigma hint for the initial accretion phase.

astro-ph↗

arXiv2007

The first second of SN1987A neutrino emission

A large fraction of SN1987A electron antineutrino events has been recorded in the first second. We study how this observation fits into the conventional paradigm for neutrino emission, and show that there is a 3.2 sigma hint for an initial accretion phase. This phase involves a large fraction of the energy emitted in neutrinos and antineutrinos, about 20 % or larger. The occurrence of neutrino oscillations strengthens these inferences. We discuss why three flavor oscillations with normal mass hierarchy are completely acceptable, whereas oscillations with inverted mass hierarchy require more troublesome interpretations, if theta(13) is above 0.5-1 degrees.

astro-ph↗