Model atmospheres for SNe II during early stages.

Details Model atmospheres for SNe II during early stages. Model atmospheres for SNe II during early stages.

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991anpcs..16..397b&link_type=abstract

Ann. Phys. (Paris) Colloq., Vol. 16, No. 4, p. 397 - 411

Physics

Supernovae: Model Atmospheres, Stellar Photospheres: Radiative Transfer, Supernova 1979C In M100, Supernova 1980K In Ngc 6946, Supernova 1987A In Lmc

Scientific paper

The photospheres of type II supernovae during the coasting phase are characterized by moderate temperatures, large radii, very low densities and high expansions velocities. These properties lead to large geometrical extensions and to electron scattering as the main source of opacity. Therefore these photospheres are very different from those of stars in hydrostatic equilibrium. In this review the authors first describe the input physics for models and essential numerical aspects of the model construction. In particular they stress the central role of an adequate treatment of the radiative transfer equation which should simultaneously take into account the sphericity, a high ratio of scattering to absorption, and relativistic effects. Subsequently they discuss details of the emergent spectra and their relevance for parameter determinations. Finally, model spectra are compared with observations of the brights supernovae SN 1979c and SN 1980k, which seem to be more average examples of type II supernovae than SN 1987A, and possibilities for using these objects for extragalactic distance determinations are investigated.

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