SN 1991bg - A type IA supernova with a difference Academic Article uri icon


  • We present 13 spectra and 31 photometric observations covering the first 150 days of SN 1991bg in NGC 4374 (M 84). Although SN 1991bg was a type Ia supernova displaying the characteristic Si II absorption at 6150 near maximum and the Fe emission lines at late phases, it varied from the well-defined norm for SNe Ia in several important respects. The peculiarities include faster declines in the B and V light curves after maximum, a distinct color evolution, a very red B - V color near maximum, relatively faint peak luminosity, a distinct spectral evolution, and a short peak phase. The narrow peak of the luminosity and the rapid declines of the light curves suggest a smaller mass in the.

published proceedings

  • The Astronomical Journal

author list (cited authors)

  • Leibundgut, B., Kirshner, R. P., Phillips, M. M., Wells, L. A., Suntzeff, N. B., Hamuy, M., ... Sonneborn, G.

citation count

  • 256

complete list of authors

  • Leibundgut, Bruno||Kirshner, Robert P||Phillips, Mark M||Wells, Lisa A||Suntzeff, NB||Hamuy, Mario||Schommer, RA||Walker, AR||Gonzalez, L||Ugarte, P||Williams, RE||Williger, G||Gomez, Mercedes||Marzke, Ronald||Schmidt, Brian P||Whitney, Barbara||Coldwell, Nelson||Peters, J||Chaffee, FH||Foltz, Craig B||Rehner, D||Siciliano, L||Barnes, TG||Cheng, K-P||Hintzen, PMN||Kim, Y-C||Maza, Jose||Parker, J Wm||Porter, AC||Schmidtke, PC||Sonneborn, George

publication date

  • January 1993