26-30 July 2021
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Europe/Berlin timezone

Axion-like Particles from Hypernovae

Not scheduled
20m
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Poster Astroparticle and Gravitational Waves T01: Astroparticle and Gravitational Waves

Speaker

Giuseppe Lucente (University of Bari, INFN Bari)

Description

It was recently pointed out that very energetic subclasses of supernovae (SNe), like hypernovae and superluminous SNe, might host ultra-strong magnetic fields in their core. Such fields may catalyze the production of feebly interacting particles, changing the predicted emission rates. Here we consider the case of axion-like particles (ALPs) and show that the predicted large scale magnetic fields in the core contribute significantly to the ALP production, via a coherent conversion of thermal photons. Using recent state-of-the-art SN simulations including magnetohydrodynamics, we find that if ALPs have masses $m_a \sim {\mathcal O}(10)\, \rm MeV$, their emissivity via magnetic conversions is over two orders of magnitude larger than previously estimated. Moreover, the radiative decay of these massive ALPs would lead to a peculiar delay in the arrival times of the daughter photons. Therefore, high-statistics gamma-ray satellites can potentially discover MeV ALPs in an unprobed region of the parameter space and shed light on the magnetohydrodinamical nature of the SN explosion.

First author Lucente Giuseppe
Collaboration / Activity None
Email giuseppe.lucente@ba.infn.it

Primary authors

Giuseppe Lucente (University of Bari, INFN Bari) Pierluca Carenza (Università degli Studi di Bari) Andrea Caputo (University of Valencia and IFIC) Edoardo Vitagliano (Max Planck Institute for Physics) Alessandro Mirizzi (University of Bari) Prof. Maurizio Giannotti (Barry University) Dr Takami Kuroda (Max-Planck-Institut für Gravitationsphysik, Postdam-Golm) Prof. Kei Kotake (Fukuoka University)

Presentation Materials