A limit on the production of Ni-56 in a type I supernova

Details A limit on the production of Ni-56 in a type I supernova A limit on the production of Ni-56 in a type I supernova

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...362..235m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 362, Oct. 10, 1990, p. 235-240.

Astronomy and Astrophysics

Astrophysics

12

Gamma Ray Spectrometers, Light Curve, Nickel Isotopes, Nuclear Fusion, Supernovae, Emission Spectra, Line Spectra, Solar Maximum Mission, White Dwarf Stars

Scientific paper

The data from the Gamma-Ray Spectrometer on the Solar Maximum Mission satellite have been searched for evidence of gamma-ray line emission from the decay of Co-56 in the type Ia SN, 1986G. No significant flux at either 847 or 1238 keV, the energies of the two strongest decay lines is found. Based on the data, a 3-sigma upper limit of 0.4 solar masses (D/3 Mpc)-squared on the amount of Ni-56 produced in the explosion is set. This value is consistent with radioactive models of type I light curves. For distances less than 3 Mpc, the limit is inconsistent with most models of SN Ia as thermonuclear explosions of white dwarfs.

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