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Date and Time of the Query: 2019-08-18 T06:56:37 PDT
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For refcode 1998ApJ...499L..49M:
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Copyright by American Astronomical Society. Reproduced by permission
1998ApJ...499L..49M Nebular Velocities in Type Ia Supernovae and Their Relationship to Light Curves P. A. MAZZALI, E. CAPPELLARO, I. J. DANZIGER, M. TURATTO, AND S. BENETTI Received 1998 February 12; accepted 1998 March 19; published 1998 May 4 ABSTRACT Recently gathered observational data on a sample of Type Ia supernovae (SNe Ia) reveal a wide distribution of expansion velocities of the Fe cores, measured from the width of the nebular lines. Moreover, the velocity appears to correlate with the luminosity decline rate after maximum light, {DELTA}m_15_(B). Since it has been shown that, for SNe Ia, {DELTA}m_15_(B) correlates with the absolute magnitude at maximum, this then implies a relation between the expansion velocity of the Fe nebula and the luminosity at maximum. Physically, the maximum luminosity is related to the mass of synthesized ^56^Ni, whereas the FWHM of the lines is related to the kinetic energy of the ejecta. Our finding constitutes observational proof of the theoretical prediction that the two quantities have to be related. Subject heading: supernovae: general
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