Light Curve Studies of SN 1993J and SN 1994I
Citations Over TimeTop 11% of 1995 papers
Abstract
Numerical light curve calculations have been carried out to constrain the light-curve parameters of the recent SNs 1993J and 1994I. For SN 1993J the radius of the progenitor star is constrained to be in the range 2-4 × 1013 cm which is consistent with the candidate progenitor star. The ejected mass is constrained to be in the range 1.9-3.5 M☉; equating the ejected mass to the helium core mass of the progenitor implies a main-sequence mass in the range 12-17 M☉. Using the new Cepheid distance to M81, the ejected 56Ni mass is found to be in the range 0.10-0.14 M☉. For SN 1994I the ejected mass is in the range 0.9-1.3 M☉; equating the ejected mass to the carbon-oxygen core mass of the progenitor implies a main-sequence mass in the range 13-20 M☉. For a distance of 7 Mpc and an extinction AV = 1.4 mag, the ejected 56Ni mass is found to be 0.07 M☉. Recent studies of galactic chemical evolution have suggested that the main-sequence masses and ejected 56Ni masses of core collapse SNs may be inversely correlated. We examine this effect for 1993J, 1994I, and 1987A, but the small number of known nickel mass-main-sequence mass systems makes it too early to draw definitive conclusions.
Related Papers
- → Cepheids in M31: The PAndromeda Cepheid Sample(2018)25 cited
- → Metallic-line and H radial velocities of seven southern Cepheids: a comparative analysis(1992)34 cited
- → Period Changes in Galactic Classical Cepheids. Slow Evolution of Long-period Cepheids(2003)
- → Cepheid and RR Lyrae Variables as Standard Candles and What Else?(2018)
- Cepheid and RR Lyrae Variables as Standard Candles and What Else(2018)