skip to main content

DOE PAGESDOE PAGES

Title: Fermi Large Area Telescope as a Galactic Supernovae Axionscope

In a Galactic core-collapse supernova (SN), axionlike particles (ALPs) could be emitted via the Primakoff process and eventually convert into γ rays in the magnetic field of the Milky Way. From a data-driven sensitivity estimate, we find that, for a SN exploding in our Galaxy, the Fermi Large Area Telescope (LAT) would be able to explore the photon-ALP coupling down to g ≃ 2 × 10 -13 GeV -1 for an ALP mass m a ≲ 10 -9 eV. Also, these values are out of reach of next generation laboratory experiments. In this event, the Fermi LAT would probe large regions of the ALP parameter space invoked to explain the anomalous transparency of the Universe to γ rays, stellar cooling anomalies, and cold dark matter. Lastly, if no γ-ray emission were to be detected, Fermi-LAT observations would improve current bounds derived from SN 1987A by more than 1 order of magnitude.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Stockholm Univ. (Sweden). Department of Physics; The Oskar Klein Centre for Cosmoparticle Physics, Stockholm (Sweden)
  2. Barry University, Miami Shores, FL (United States). Physical Sciences
  3. Dipartimento Interateneo di Fisica Michelangelo Merlin (Italy); Istituto Nazionale di Fisica Nuclearea Sezione di Bari (Italy)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 1; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS
OSTI Identifier:
1355749
Alternate Identifier(s):
OSTI ID: 1338650