Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Thu., July 15, 2004, at 3:00 p.m.

Classical novae: stellar pyrotechnics at the crossroads of nuclear physics, astrophysics and cosmochemistry

Jordi Jose, University of North Carolina at Chapel Hill
6008 Conference Room

One of the observational evidences in support of the thermonuclear runaway model for classical nova outbursts relies on the accompanying nucleosynthesis. In this colloquium, I'll review thirty years of nucleosynthesis models, with special emphasis on the role played by nuclear uncertainties associated to key reactions of the NeNa-MgAl and Si-Ca regions. A number of nuclear physics experiments of interest for nova nucleosynthesis will be outlined. Among the additional topics to be covered I list the interplay between nova outbursts and the Galactic chemical abundances (13C, 15N and 17O), the synthesis of radioactive nuclei, of interest for gamma-ray astronomy, such as 7Li, 22Na or 26Al, the endpoint of nova nucleosynthesis, based on both theoretical and observational grounds, and the recent discovery of presolar meteoritic grains, both in the Murchison and Acfer meteorites, likely condensed in the shells ejected during nova outbursts.

host: Dan Bardayan