AAS Meeting #193 - Austin, Texas, January 1999
Session 47. Supernovae
Display, Thursday, January 7, 1999, 9:20am-6:30pm, Exhibit Hall 1

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[47.12] The Rise Times of Type Ia Supernovae

P. Nugent (Lawrence Berkeley National Laboratory), Supernova Cosmology Project Collaboration

Due to the nature of our high-redshift supernovae search techniques, the Supernova Cosmology Project has been able to map the very early rising portion of the light curve for a Type Ia supernova. Over the past 4 years we have acquired over 100 data points on several supernovae between 30 and 10 days before peak brightness in the restframe B-band light curve. This has provided us with the ability to very accurately define the rise time of a Type Ia supernova. The results from this data have broad implications for both the theoretical modeling and cosmological use of Type Ia supernovae. Theoretically, the rise time provides a very strong constraint on acceptable models, directly influencing nucleosynthesis and opacity calculations as well as the overall luminosity of these objects. From a cosmological standpoint, the early portion of the optical light curve can provide a strong signature for evolution, as differences which might exist between nearby and distant sets of supernovae have the potential for showing the greatest discrepancy at these early times.

If you would like more information about this abstract, please follow the link to http://www.lbl.gov/~nugent. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: penugent@lbl.gov

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