Multimessenger probes of Axions from Compact Objects

TL;DR

This paper discusses how astrophysical observations of compact objects can be used as multimessenger probes to detect axions and axion-like particles, especially through their production in extreme stellar environments.

Contribution

It highlights the potential of multimessenger astrophysics to explore axion properties that are difficult to access with laboratory experiments.

Findings

Extreme conditions in compact stars enhance axion production.

Multimessenger signals can reveal signatures of axion emission.

Astrophysical observations can probe feeble axion couplings.

Abstract

Astrophysics plays a pivotal role in the quest for axions and axion-like particles, offering guidance to experimental efforts and enabling the investigation of axion properties that cannot be probed otherwise. In this context, the extreme conditions in the interiors of compact stellar objects -- such as core-collapse supernovae, neutron stars, and binary neutron star mergers -- significantly enhance axion production, providing unparalleled sensitivity to extremely feeble couplings to Standard Model particles. In this context, the techniques of multimessenger astrophysics deepens the understanding of powerful transient events, maximizing the capabilities of current instruments to identify possible signatures of axion emission.