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Title:
Possible Interpretations of the Magnitude-Redshift Relation for Supernovae of Type IA
Authors:
Banerjee, S. K.; Narlikar, J. V.; Wickramasinghe, N. C.; Hoyle, F.; Burbidge, G.
Affiliation:
AA(Inter-University Centre for Astronomy and Astrophysics, Pune, India), AB(Inter-University Centre for Astronomy and Astrophysics, Pune, India), AC(School of Mathematics, University of Wales, Cardiff, Senghennydd, Cardiff, Wales, UK), AD(102 Admirals Walk, West Cliff, Bournemouth, Dorset, England, UK), AE(Center for Astrophysics and Space Sciences and Department of Physics, University of California, San Diego, La Jolla, CA 92093)
Publication:
The Astronomical Journal, Volume 119, Issue 6, pp. 2583-2588. (AJ Homepage)
Publication Date:
06/2000
Origin:
UCP
AJ Keywords:
Cosmology: Observations, Cosmology: Theory, ISM: Dust, Extinction, Stars: Supernovae: General
DOI:
10.1086/301369
Bibliographic Code:
2000AJ....119.2583B

Abstract

It has been shown by Riess et al. and Perlmutter et al. that the observed redshift-magnitude relation for supernovae of type Ia, which suggests that the deceleration parameter q0 is negative, can be explained in a Friedmann model with a positive cosmological constant. We show that a quasi-steady state cosmology (QSSC) model can also fit the supernova data. Since most of the emphasis and publicity have been concentrated on explanations involving the Friedmann model, we show how a good fit can be obtained to the observations in the framework of the QSSC. Using this model, we show that absorption due to intergalactic dust may play an important role. This may explain why a few of the supernovae observed show large deviations from the curve determined by the majority of the data.
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