Constraints to the radiative lifetime of a light neutral fermion in the galactic halo from IUE

Details Constraints to the radiative lifetime of a light neutral fermion in the galactic halo from IUE Constraints to the radiative lifetime of a light neutral fermion in the galactic halo from IUE

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gedm.work.....a&link_type=abstract

Presented at Workshop on Galactic and Extragalactic Dark Matter, Rome, 28 Jun. 1983

Physics

Fermions, Galactic Radiation, Iue, Milky Way Galaxy, Continuous Radiation, Cosmology, Radiative Lifetime, Ultraviolet Spectroscopy

Scientific paper

The negative result of a search for radiative decay of a light neutral fermion, that might be the neutrino (if massive) or the photino, gravitationally bound to our Galaxy is discussed. The limit obtained for a particle of mass between 12.5 and 21.5 eV is 10 to the 18th power yr. Data on UV background in the range 1250 to 2000 A show the presence of continuum emission and diffuse line emission at high galactic latitude, identifiable with the lines C IV at 1549 A, and N III at 1749 A. The continuum level sharply rises at 1680 A, to 1700 + or - 250 ph/sq cm sec str A and remains constant up to 2000 A. Below 1680 A, no emission is found with an upper limit of 300 units.

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