Мақола

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

Adam G. RiessDepartment of Astronomy, University of California at Berkeley, Berkeley, CA 94720-3411A. V. FilippenkoDepartment of Astronomy, University of California at Berkeley, Berkeley, CA 94720-3411P. ChallisHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138A. ClocchiattiDepartamento de Astronomía y Astrofísica, Pontificia Universidad Católica, Casilla 104, Santiago 22, ChileAlan H. DiercksDepartment of Astronomy, University of Washington, Box 351580, Seattle, WA 98195P. GarnavichHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138Ron GillilandSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218Craig J. HoganDepartment of Astronomy, University of Washington, Box 351580, Seattle, WA 98195Saurabh W. JhaHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138R. KirshnerHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138B. LeibundgutEuropean Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München, GermanyM. M. PhillipsCerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, Casilla 603, La Serena, Chile. NOAO is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science FoundationDavid J. ReissDepartment of Astronomy, University of Washington, Box 351580, Seattle, WA 98195B. SchmidtMount Stromlo and Siding Spring Observatories, Private Bag, Weston Creek, ACT 2611, AustraliaR. A. SchommerCerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, Casilla 603, La Serena, Chile. NOAO is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science FoundationR. Chris SmithCerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, Casilla 603, La Serena, Chile. NOAO is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science FoundationJ. SpyromilioEuropean Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München, GermanyC. W. StubbsDepartment of Astronomy, University of Washington, Box 351580, Seattle, WA 98195N. B. SuntzeffCerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, Casilla 603, La Serena, Chile. NOAO is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science FoundationJ. TonryInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822

1998en

ABI

Аннотация

We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 z 0.62. The luminosity distances of these objects are determined by methods that employ relations between SN Ia luminosity and light curve shape. Combined with previous data from our High-z Supernova Search Team and recent results by Riess et al., this expanded set of 16 high-redshift M \ 1) methods. We estimate the dynamical age of the universe to be 14.2 ^1.7 Gyr including systematic uncertainties in the current Cepheid distance scale. We estimate the likely e ect of several sources of systematic error, including progenitor and metallicity evolution, extinction, sample selection bias, local perturbations in the expansion rate, gravitational lensing, and sample contamination. Presently, none of these e ects appear to reconcile the data with and ) " \ 0 q 0 0.

Идентификаторлар

DOI: 10.1086/300499

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