Spin Light of neutrino in polarized matter

TL;DR

This paper investigates how matter polarization in dense astrophysical environments affects the spin light of neutrinos, revealing potential observable features and implications for understanding neutron stars and magnetars.

Contribution

It introduces the effects of matter polarization on neutrino spin light, showing how polarization can enhance, suppress, or asymmetrically modify the radiation.

Findings

Polarization can significantly alter the intensity of neutrino spin light.

Matter polarization introduces asymmetry in the radiation pattern.

Effects depend on the magnetic field and polarization inside stellar objects.

Abstract

The Spin Light of neutrino ($SL\nu$) is an electromagnetic radiation of the neutrino magnetic moment emitted when neutrino moves in external conditions (fields or matter). The effect can be of significance in the extremely dense matter of compact astrophysical objects such as neutron stars (NS). If detected, this radiation could provide a fair opportunity to study the properties of neutrinos and the medium through which they move, since the properties of the radiation depend on both. Motivated by the possibility of the nuclear matter spin-polarization, in this paper, we study the new properties to $SL\nu$ obtained under the influence of net matter polarization. We demonstrate that the polarization can enhance or completely suppress the radiation. Also, it introduces a characteristic asymmetry into the total radiation from the compact object, which could be an observable feature dependent on the matter polarization and the magnetic field inside the stellar (if the field is connected to the stellar matter polarization). The research may have implications for the physics of NS and magnetars, bringing us closer to the possibility of studying their internal structure.