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Date and Time of the Query: 2019-07-23 T13:39:31 PDT
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For refcode 1993ApJ...417..547R:
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Copyright by American Astronomical Society. Reproduced by permission
1993ApJ...417..547R GAMMA-RAY ESCAPE IN TYPE Ia SUPERNOVAE: THE 847 keV-m_B_ DIAGRAM P. RUIZ-LAPUENTE, G. G. LICHTI, R. LEHOUCQ, R. CANAL, AND M. CASSE Received 1993 February 25; accepted 1993 May 17 ABSTRACT The relationship between flux in the 847 keV line and optical (B) magnitude is examined for the two Type Ia supernovae (SNe Ia) observed so far in the {gamma}-ray domain. This type of analysis allows us to discriminate between possible models for a given SN Ia event. In the case of SN 1991T in NGC 4527, in view of the constraints provided by CGRO on the flux of the 847 keV line and the B-magnitude of the supernova at the phase of the gamma-ray observation it is possible to discard many of the SN Ia models so far proposed. Models giving rise to a {gamma}-ray escape fraction larger than 80% at 70-80 days after explosion do not fall within the validity region of the 847 keV flux-m_B_ diagram. This diagram allows us to put limits on the distance to the host galaxy of the supernova and to investigate the reasonable range of values for the reddening, compatible with the observational and theoretical constraints. The case of SN 1986G, for which SMM upper limits are available (Matz & Share 1990), is examined as well. Subject headings: galaxies: distances and redshifts - gamma rays: observations - gamma rays: theory - supernovae: general - supernovae: individual (SN 199 IT, SN 1986G)
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