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• W4281483306 abstract "New particles coupled to the Standard Model can equilibrate in stellar cores if they are sufficiently heavy and strongly coupled. In this work, we investigate the astrophysical consequences of such a scenario for massive stars by incorporating new contributions to the equation of state into a state of the art stellar structure code. We focus on axions in the ``cosmological triangle,'' a region of parameter space with $300text{ }text{ }mathrm{keV}ensuremath{lesssim}{m}_{a}ensuremath{lesssim}2text{ }text{ }mathrm{MeV}$, ${g}_{aensuremath{gamma}ensuremath{gamma}}ensuremath{sim}{10}^{ensuremath{-}5}text{ }text{ }{mathrm{GeV}}^{ensuremath{-}1}$ that is not presently excluded by other considerations. We find that for axion masses ${m}_{a}ensuremath{sim}{m}_{e}$, axion production in the core drives a new stellar instability that results in explosive nuclear burning that either drives a series of mass-shedding pulsations or completely disrupts the star resulting in a new type of optical transient---an Axion Instability Supernova. We predict that the upper black hole mass gap would be located at $37text{ }text{ }{mathrm{M}}_{ensuremath{bigodot}}ensuremath{le}Mensuremath{le}107text{ }text{ }{mathrm{M}}_{ensuremath{bigodot}}$ in these theories, a large shift down from the standard prediction, which is disfavored by the detection of the mass gap in the LIGO/Virgo/KAGRA GWTC-2 gravitational wave catalog beginning at ${46}_{ensuremath{-}6}^{+17}text{ }text{ }{mathrm{M}}_{ensuremath{bigodot}}$. Furthermore, axion-instability supernovae are more common than pair-instability supernovae, making them excellent candidate targets for James Webb Space Telescope. The methods presented in this work can be used to investigate the astrophysical consequences of any theory of new physics that contains heavy bosonic particles of arbitrary spin. We provide the tools to facilitate such studies." @default.
• W4281483306 created "2022-05-26" @default.
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• W4281483306 date "2022-05-25" @default.
• W4281483306 modified "2023-10-03" @default.
• W4281483306 title "Axion instability supernovae" @default.
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• W4281483306 doi "https://doi.org/10.1103/physrevd.105.095038" @default.
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