Gamma-rays from SN1987A due to pseudoscalar conversion

Grifols, J.A.; Masso, E.; Toldra, R.

doi:10.1103/PhysRevLett.77.2372

Gamma-rays from SN1987A due to pseudoscalar conversion

J.A. Grifols
(
- Barcelona, Autonoma U.
)
,
E. Masso
(
- Barcelona, Autonoma U.
)
,
R. Toldra
(
- Barcelona, Autonoma U.
)

May, 1996

8 pages

Published in:

Phys.Rev.Lett. 77 (1996) 2372-2375

e-Print:

astro-ph/9606028 [astro-ph]

DOI:

10.1103/PhysRevLett.77.2372

Report number:

UAB-FT-391

View in:

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Abstract: (arXiv)

A light pseudoscalar coupled to two photons would be copiously emitted by the core of a supernova. Part of this flux would be converted to

\gamma-

rays by the galactic magnetic field. Measurements on the SN1987A

\gamma-

ray flux by the Gamma-Ray Spectrometer on the Solar Maximum Mission satellite already imply a bound on the coupling

g < 3 \times 10~{-12}

GeV

~{-1}

. The improved generation of satellite-borne detectors, like EGRET or the project GLAST, could be able to detect a pseudoscalar-to-photon signal from a nearby supernova, for allowed values of

g

.

Note:

8 pages, no figures Report-no: UAB-FT-391

cosmic radiation: primary
photon: cosmic radiation
cosmic radiation: particle source
flux: cosmic radiation
cosmic radiation: flux
pseudoscalar particle: production
production: pseudoscalar particle
Primakoff effect
pseudoscalar particle: radiative decay
radiative decay: pseudoscalar particle

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