Axion-Polaritons in quark stars: a possible solution to the missing pulsar problem

Abstract

This paper proposes an alternative mechanism to solve the so-called missing pulsar problem, a standing paradox between the theoretical expectations about the number of pulsars that should exist in the galaxy center of the Milky Way and their absence in the observations. The mechanism is based on the transformation of incident $\gamma$ rays into hybridized modes, known as axion-polaritons, which can exist inside highly magnetized quark stars with a quark matter phase known as the magnetic dual chiral density wave phase. This phase, which is favored over several other dense matter phases candidates at densities a few times nuclear saturation density, has already passed several important astrophysical tests. In the proposed mechanism, the absence of young magnetars occurs because as electromagnetic waves inside the star can only propagate through the hybridized modes, incident photons coming from a $\gamma$-ray burst get transformed into massless and massive axion polaritons by the Primakoff effect. Once thermalized, the massive axion-polaritons can self-gravitate up to a situation where their total mass overpasses the Chandrasekhar limit for these bosons, producing a mini blackhole that collapses the star.

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Cited by in corpus (5)

• QCD topology and axion properties in an isotropic hot and dense medium
• Low Mass Naked Singularities from Dark Core Collapse
• Thermal phonon fluctuations and stability of the magnetic dual chiral density wave phase in dense QCD
• Magnetically arrested transmutation of a compact star
• Casimir effect in magnetic dual chiral density waves