Fast time variations of supernova neutrino signals from 3-dimensional models

TL;DR

This paper investigates supernova neutrino flux variations using 3D models, finding smaller fluctuations than 2D models, but still detectable signals up to 100 Hz for nearby supernovae within 2 kpc.

Contribution

It introduces 3D supernova models with simplified neutrino transport to analyze neutrino flux variations, highlighting differences from previous 2D studies.

Findings

3D models show smaller flux variations than 2D models.

Neutrino flux variations up to 100 Hz could be detected within 2 kpc.

Reduced SASI activity in 3D models explains smaller fluctuations.

Abstract

We study supernova neutrino flux variations in the IceCube detector, using 3D models based on a simplified neutrino transport scheme. The hemispherically integrated neutrino emission shows significantly smaller variations compared with our previous study of 2D models, largely because of the reduced SASI activity in this set of 3D models which we interpret as a pessimistic extreme. For the studied cases, intrinsic flux variations up to about 100 Hz frequencies could still be detected in a supernova closer than about 2 kpc.