11-14 March 2025
IFT UAM/CSIC
Europe/Madrid timezone

Constraining Light QCD Axions with Isolated Neutron Star Cooling

13 Mar 2025, 16:10
25m
IFT UAM/CSIC

IFT UAM/CSIC

Speaker

Antonio Gómez Bañón (Universidad de Alicante)

Description

The existence of light QCD axions, whose mass depends on an additional free parameter, can lead to a new ground state of matter, where the sourced axion field reduces the nucleon effective mass. The presence of the axion field has structural consequences, in particular, it results in a thinner (or even prevents its existence) heat-blanketing envelope, significantly altering the cooling patterns of neutron stars. We exploit the anomalous cooling behavior to constrain previously uncharted regions of the axion parameter space by comparing model predictions with existing data from isolated neutron stars. Notably, this analysis does not require the light QCD axion to be the dark matter candidate.

Primary author

Antonio Gómez Bañón (Universidad de Alicante)

Co-authors

Presentation Materials

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