You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1 line
45 KiB
1 line
45 KiB
7 years ago
|
[[["https://export.arxiv.org/api/query?id_list=astro-ph/9812133"], {}, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<feed xmlns=\"http://www.w3.org/2005/Atom\">\n <link href=\"http://arxiv.org/api/query?search_query%3D%26id_list%3Dastro-ph%2F9812133%26start%3D0%26max_results%3D10\" rel=\"self\" type=\"application/atom+xml\"/>\n <title type=\"html\">ArXiv Query: search_query=&id_list=astro-ph/9812133&start=0&max_results=10</title>\n <id>http://arxiv.org/api/SfKekabpSjI/htnxCLpK3q9AsUs</id>\n <updated>2018-08-09T00:00:00-04:00</updated>\n <opensearch:totalResults xmlns:opensearch=\"http://a9.com/-/spec/opensearch/1.1/\">1</opensearch:totalResults>\n <opensearch:startIndex xmlns:opensearch=\"http://a9.com/-/spec/opensearch/1.1/\">0</opensearch:startIndex>\n <opensearch:itemsPerPage xmlns:opensearch=\"http://a9.com/-/spec/opensearch/1.1/\">10</opensearch:itemsPerPage>\n <entry>\n <id>http://arxiv.org/abs/astro-ph/9812133v1</id>\n <updated>1998-12-08T03:27:34Z</updated>\n <published>1998-12-08T03:27:34Z</published>\n <title>Measurements of Omega and Lambda from 42 High-Redshift Supernovae</title>\n <summary> We report measurements of the mass density, Omega_M, and\ncosmological-constant energy density, Omega_Lambda, of the universe based on\nthe analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology\nProject. The magnitude-redshift data for these SNe, at redshifts between 0.18\nand 0.83, are fit jointly with a set of SNe from the Calan/Tololo Supernova\nSurvey, at redshifts below 0.1, to yield values for the cosmological\nparameters. All SN peak magnitudes are standardized using a SN Ia lightcurve\nwidth-luminosity relation. The measurement yields a joint probability\ndistribution of the cosmological parameters that is approximated by the\nrelation 0.8 Omega_M - 0.6 Omega_Lambda ~= -0.2 +/- 0.1 in the region of\ninterest (Omega_M <~ 1.5). For a flat (Omega_M + Omega_Lambda = 1) cosmology we\nfind Omega_M = 0.28{+0.09,-0.08} (1 sigma statistical) {+0.05,-0.04}\n(identified systematics). The data are strongly inconsistent with a Lambda = 0\nflat cosmology, the simplest inflationary universe model. An open, Lambda = 0\ncosmology also does not fit the data well: the data indicate that the\ncosmological constant is non-zero and positive, with a confidence of P(Lambda >\n0) = 99%, including the identified systematic uncertainties. The best-fit age\nof the universe relative to the Hubble time is t_0 = 14.9{+1.4,-1.1} (0.63/h)\nGyr for a flat cosmology. The size of our sample allows us to perform a variety\nof statistical tests to check for possible systematic errors and biases. We\nfind no significant differences in either the host reddening distribution or\nMalmquist bias between the low-redshift Calan/Tololo sample and our\nhigh-redshift sample. The conclusions are robust whether or not a\nwidth-luminosity relation is used to standardize the SN peak magnitudes.\n</summary>\n <author>\n <name>S. Perlmutter</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <author>\n <name>G. Aldering</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <author>\n <name>G. Goldhaber</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <author>\n <name>R. A. Knop</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <author>\n <name>P. Nugent</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <author>\n <name>P. G. Castro</name>\n <arxiv:affiliation xmlns:arxiv=\"http://arxiv.org/schemas/atom\">The Supernova Cosmology Project</arxiv:affiliation>\n </author>\n <aut
|