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Constraining the Axion-Photon Coupling with Massive Stars

Alexander Friedland, Maurizio Giannotti, and Michael Wise
Phys. Rev. Lett. 110, 061101 – Published 4 February 2013
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Abstract

We point out that stars in the mass window 812M can serve as sensitive probes of the axion-photon interaction, gAγγ. Specifically, for these stars axion energy losses from the helium-burning core would shorten and eventually eliminate the blue loop phase of the evolution. This would contradict observational data, since the blue loops are required, e.g., to account for the existence of Cepheid stars. Using the MESA stellar evolution code, modified to include the extra cooling, we conservatively find gAγγ0.8×1010GeV1, which compares favorably with the existing bounds.

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  • Received 11 October 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.061101

© 2013 American Physical Society

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Particle Physics in the Sky

Published 4 February 2013

Much can be learned about hypothetical particles called axions by studying the evolution of massive stars.

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Authors & Affiliations

Alexander Friedland1,*, Maurizio Giannotti2,†, and Michael Wise2,‡

  • 1Theoretical Division, T-2, MS B285, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 2Physical Sciences, Barry University, 11300 NE 2nd Avenue, Miami Shores, Florida 33161, USA

  • *friedland@lanl.gov
  • mgiannotti@mail.barry.edu
  • mwise@mail.barry.edu

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Vol. 110, Iss. 6 — 8 February 2013

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