Discovery of the farthest known supernova, and some cosmological implications.

Details Discovery of the farthest known supernova, and some cosmological implications. Discovery of the farthest known supernova, and some cosmological implications.

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.8905p&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #89.05; Bulletin of the American Astronomical Society, Vol. 24, p.1264

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We describe our recent discovery and follow-up observations of a supernova at redshift z=0.457, and explain how such a supernova can be used to measure the deceleration parameter q_0 and hence the mass density of the universe, Omega . With one well-studied supernova, q_0 or Omega can be measured to an accuracy comparable to previous measurements; with tens of distant supernovae, we can do significantly better, since we can reduce statistical uncertainty and resolve a number of systematic issues. This discovery is the first step in a program to search for distant supernovae in batches suitable for follow-up observations. These supernovae should yield some of the empirical results necessary to test the current cosmological theories and to stimulate new ones.

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