Theoretical Light Curves of Type II-P SNe and Applications to Cosmology

Details Theoretical Light Curves of Type II-P SNe and Applications to Cosmology Theoretical Light Curves of Type II-P SNe and Applications to Cosmology

2003-06-30

arxiv.org/abs/astro-ph/0306629v1

Mon.Not.Roy.Astron.Soc.345:111,2003

Astronomy and Astrophysics

Astrophysics

14 pages, 16 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2003.06958.x

Based on an extensive grid of stellar models between 13 and 25 Mo and a wide range of metallicities, we have studied the light curves of core collapse supernovae, their application to cosmology and evolutionary effects with redshift. The direct link between the hydro and radiation transport allows to calculate monochromatic light curves. With decreasing metallicity Z and increasing mass, progenitors tend to explode as compact Blue Supergiants and produce sub-luminous supernovae that are about 1.5 mag dimmer compared to "normal" SNe II with Red Supergiant progenitors (RSGs). Progenitors with small masses tend to explode as RSGs even at low Z. The consequences are obvious for probing the chemical evolution, namely, a strong bias when using the statistics of core collapse supernovae to probe the history of star formation. Our study is limited in scope with respect to the explosion energies and the production of radioactive Ni. Within the class of "extreme SNe II-P" supernovae, the light curves are rather insensitive with respect to the progenitor mass and explosion energy compared to analytic models which are based on parameterized stellar structures. We expect a wider range of brightness due to variations in Ni56 because radioactive energy is a main source of luminosity. However, the overall insensitivity of LCs may allow their use as quasi-standard candles for distance determination.

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