2001/05/31 by Edvard Mörtsell, Edvard Moertsell, Christofer Gunnarsson +3 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Neutrino Physics Research #astro-ph
paper · pdf · doi:10.1086/323242
published as ApJ, 561, 106 (2001) · 5 pages, 4 figures, minor revisions after bug fix, conclusions remain unchanged
openalex publication_date 2001/11/01 · arxiv created 2003/02/06 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/31
We investigate the effects of gravitational lensing due to intervening galaxies on the recently discovered Type Ia supernova at z=1.7, SN1997ff, in the Hubble Deep Field North. We find that it is possible to obtain a wide range of magnifications by varying the mass and/or the velocity dispersion normalization of the lensing galaxies. In order to be able to use SN1997ff to constrain the redshift-distance relation, very detailed modeling of the galaxies to control the systematic effects from lensing is necessary. Thus we argue, that based on our current limited knowledge of the lensing galaxies, it is difficult to use SN1997ff to constrain the values of OmegaM and OmegaLambda, or even to place severe limits on grey dust obscuration or luminosity evolution of Type Ia supernovae.