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arXiv:astro-ph/9602124 (astro-ph)
[Submitted on 23 Feb 1996]

Title:Observation of Cosmological Time Dilation using Type Ia Supernovae as Clocks

Authors:G. Goldhaber, S. Deustua, S. Gabi, D. Groom, I. Hook, A. Kim, M. Kim, J. Lee, R. Pain, C. Pennypacker, S. Perlmutter, I. Small, A. Goobar, R. Ellis, K. Glazebrook, R. McMahon, B. Boyle, P. Bunclark, D. Carter, M. Irwin, H. Newberg, A. V. Filippenko, T. Matheson, M. Dopita, J. Mould, W. Couch (The Supernova Cosmology Project: III)
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Abstract: This work is based on the first results from a systematic search for high redshift Type Ia supernovae. Using filters in the R-band we discovered seven such SNe, with redshift z = 0.3 - 0.5, before or at maximum light. Type Ia SNe are known to be a homogeneous group of SNe, to first order, with very similar light curves, spectra and peak luminosities. In this talk we report that the light curves we observe are all broadened (time dilated) as expected from the expanding universe hypothesis. Small variations from the expected 1+z broadening of the light curve widths can be attributed to a width-brightness correlation that has been observed for nearby SNe (z<0.1). We show in this talk the first clear observation of the cosmological time dilation for macroscopic objects.
Comments: 8 pages, 3 Postscript figures, uuencoded uses this http URL and this http URL. To appear in Thermonuclear Supernovae (NATO ASI), eds. R. Canal, P. Ruiz-LaPuente, and J. Isern. Postscript version is also available at this http URL
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9602124
  (or arXiv:astro-ph/9602124v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9602124

Submission history

From: Saul Perlmutter [view email]
[v1] Fri, 23 Feb 1996 05:51:07 UTC (45 KB)
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