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Feasibility of Measuring the Cosmological Constant Lambda and Mass Density Omega Using Type IA Supernovae

1995; IOP Publishing; Volume: 450; Linguagem: Inglês

10.1086/176113

1538-4357

A. Goobar, S. Perlmutter,

Astronomy and Astrophysical Research

view Abstract Citations (155) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Feasibility of Measuring the Cosmological Constant Lambda and Mass Density Omega Using Type IA Supernovae Goobar, Ariel ; Perlmutter, Saul Abstract We explore the feasibility of resurrecting the apparent magnitude-redshift relation for a "standard candle" to measure the cosmological constant and mass density. We show that Type Ia supernovae, if measured with 0.15 mag uncertainty out to a redshift of z = 1, may provide a good standard candle or calibrated candle for this purpose. The recent discovery of probable Type Ia supernovae in the redshift range z = 0.3-0.5 (Perlmutter et al. 1994, 1995) indicates that the flux of optical photons from these events can be measured this accurately. The seven distant supernovae discovered to date do not by themselves distinguish among different cosmological models; however, the further discovery of about 50 Type Ia supernovae at redshifts in the range 0.5 ≤ z ≤ 1.0 could strongly constrain the allowed range of these parameters. We estimate that the follow-up photometry necessary for this measurement would be on the order of 20-70 hr of time on a 10 m class telescope at a site with good seeing. Publication: The Astrophysical Journal Pub Date: September 1995 DOI: 10.1086/176113 arXiv: arXiv:astro-ph/9505022 Bibcode: 1995ApJ...450...14G Keywords: COSMOLOGY: DISTANCE SCALE; COSMOLOGY: OBSERVATIONS; STARS: SUPERNOVAE: GENERAL; Astrophysics E-Print: Latex using aasms.sty with links to four encapsulated postcript files uuencoded compressed. Complete postscript version also available at http://www-supernova.lbl.gov/public/index.html Accepted Ap.J. To appear 1 Sept 1995 full text sources arXiv | ADS | data products SIMBAD (1)