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Modeling Supernova Spectra

Published online by Cambridge University Press:  23 April 2012

D. John Hillier ,
Luc Dessart  and
Chendong Li
D. John Hillier
Affiliation:
University of Pittsburgh, Department of Physics and Astronomy, 100 Allen Hall, Pittsburgh, PA 15260, USA email: hillier@pitt.edu; chl85@pitt.edu
Luc Dessart
Affiliation:
Laboratoire d'Astrophysique de Marseille, Université de Provence, CNRS, 38 rue Frédéric Joliot-Curie, F-13388 Marseille Cedex 13, France email: Luc.Dessart@oamp.fr
Chendong Li
Affiliation:
University of Pittsburgh, Department of Physics and Astronomy, 100 Allen Hall, Pittsburgh, PA 15260, USA email: hillier@pitt.edu; chl85@pitt.edu
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Abstract

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We highlight results from a series of investigations into modeling spectra of core-collapse supernovae (SNe). We have explored the accuracy of the expanding-photosphere method, and found that it can be used to obtain distances to Type IIP SNe with an accuracy of ≲10%. We confirm the result of Utrobin and Chugai (2005) that time-dependent terms must be included in the statistical equilibrium equations in order to model Hi line evolution in Type II SNe, and show that time-dependent terms influence other spectral features (e.g., He i lines). We have initiated a study of polarization signatures from aspherical but axially-symmetric Type II SN ejecta. Hillier and Li acknowledge support from STScI theory grant HST-AR-11756.01.A and NASA theory grant NNX10AC80G. Dessart acknowledges financial support from grant PIRG04-GA-2008-239184.

Keywords

stars: supernovae general – stars: supernovae individual (SN 1987A, SN 1999em) – stars: distances – radiative transfer
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 251 - 252
Copyright
Copyright © International Astronomical Union 2012

References

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