VOOZH about

URL: https://iopscience.iop.org/article/10.1086/376865

⇱ Cosmological Results from High-z Supernovae - IOPscience

The American Astronomical Society (AAS), established in 1899 and based in Washington, DC, is the major organization of professional astronomers in North America. Its membership of about 7,000 individuals also includes physicists, mathematicians, geologists, engineers, and others whose research and educational interests lie within the broad spectrum of subjects comprising contemporary astronomy. The mission of the AAS is to enhance and share humanity's scientific understanding of the universe.

The following article is Free article

Cosmological Results from High-z Supernovae* **

, , , , , , , , ,

© 2003. The American Astronomical Society. All rights reserved. Printed in U.S.A.
The Astrophysical Journal, Volume 594, Number 1Citation John L. Tonry et al 2003 ApJ 594 1DOI 10.1086/376865

John L. Tonry

AFFILIATIONS

Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822

Brian P. Schmidt

AFFILIATIONS

The Research School of Astronomy and Astrophysics, The Australian National University, Mount Stromlo and Siding Spring Observatories, via Cotter Road, Weston Creek PO 2611, Australia

Brian Barris

AFFILIATIONS

Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822

Pablo Candia

AFFILIATIONS

Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Peter Challis

AFFILIATIONS

Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138

Alejandro Clocchiatti

AFFILIATIONS

Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile

Alison L. Coil

AFFILIATIONS

Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720-3411

Alexei V. Filippenko

AFFILIATIONS

Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720-3411

Peter Garnavich

AFFILIATIONS

Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556-5670

Craig Hogan

AFFILIATIONS

Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580

Stephen T. Holland

AFFILIATIONS

Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556-5670

Saurabh Jha

AFFILIATIONS

Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138

Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720-3411

Robert P. Kirshner

AFFILIATIONS

Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138

Kevin Krisciunas

AFFILIATIONS

Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Las Campanas Observatory, Casilla 601, La Serena, Chile

Bruno Leibundgut

AFFILIATIONS

European Southern Observatory, Karl-Schwarzschild-Strasse 2, Garching, D-85748, Germany

Weidong Li

AFFILIATIONS

Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720-3411

Thomas Matheson

AFFILIATIONS

Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138

Mark M. Phillips

AFFILIATIONS

Las Campanas Observatory, Casilla 601, La Serena, Chile

Adam G. Riess

AFFILIATIONS

Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218

Robert Schommer

AFFILIATIONS

Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Stockholm Observatory, SCFAB, SE-106 91 Stockholm, Sweden

R. Chris Smith

AFFILIATIONS

Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Jesper Sollerman

AFFILIATIONS

Deceased 2001 December 12

Jason Spyromilio

AFFILIATIONS

European Southern Observatory, Karl-Schwarzschild-Strasse 2, Garching, D-85748, Germany

Christopher W. Stubbs

AFFILIATIONS

Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580

Nicholas B. Suntzeff

AFFILIATIONS

Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Article metrics

5112 Total downloads
0 Video abstract views

Share this article

Dates

  1. Received 2003 February 28
  2. Accepted 2003 May 6
0004-637X/594/1/1

Abstract

The High-z Supernova Search Team has discovered and observed eight new supernovae in the redshift interval z = 0.3-1.2. These independent observations, analyzed by similar but distinct methods, confirm the results of Riess and Perlmutter and coworkers that supernova luminosity distances imply an accelerating universe. More importantly, they extend the redshift range of consistently observed Type Ia supernovae (SNe Ia) to z ≈ 1, where the signature of cosmological effects has the opposite sign of some plausible systematic effects. Consequently, these measurements not only provide another quantitative confirmation of the importance of dark energy, but also constitute a powerful qualitative test for the cosmological origin of cosmic acceleration. We find a rate for SN Ia of (1.4 ± 0.5) × 10-4 h3 Mpc-3 yr-1 at a mean redshift of 0.5. We present distances and host extinctions for 230 SN Ia. These place the following constraints on cosmological quantities: if the equation of state parameter of the dark energy is w = -1, then H0t0 = 0.96 ± 0.04, and ΩΛ - 1.4ΩM = 0.35 ± 0.14. Including the constraint of a flat universe, we find ΩM = 0.28 ± 0.05, independent of any large-scale structure measurements. Adopting a prior based on the Two Degree Field (2dF) Redshift Survey constraint on ΩM and assuming a flat universe, we find that the equation of state parameter of the dark energy lies in the range -1.48 < w < -0.72 at 95% confidence. If we further assume that w > -1, we obtain w < -0.73 at 95% confidence. These constraints are similar in precision and in value to recent results reported using the WMAP satellite, also in combination with the 2dF Redshift Survey.

Export citation and abstractBibTeXRIS

Footnotes

  • * 

    Based in part on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., under NASA contract NAS 5-26555. This research is primarily associated with proposal GO-8177, but also uses and reports results from proposals GO-7505, 7588, 8641, and 9118.

  • ** 

    CFHT: Based in part on observations taken with the Canada-France-Hawaii Telescope, operated by the National Research Council of Canada, le Centre National de la Recherche Scientifique de France, and the University of Hawaii. CTIO: Based in part on observations taken at the Cerro Tololo Inter-American Observatory. Keck: Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. UH: Based in part on observations with the University of Hawaii 2.2 m telescope at Mauna Kea Observatory, Institute for Astronomy, University of Hawaii. UKIRT: Based in part on observations with the United Kingdom Infrared Telescope (UKIRT) operated by the Joint Astronomy Centre on behalf of the UK. Particle Physics and Astronomy Research Council. VLT: Based in part on observations obtained at the European Southern Observatory, Paranal, Chile, under programs ESO 64.O-0391 and ESO 64.O-0404. WIYN: Based in part on observations taken at the WIYN Observatory, a joint facility of the University of Wisconsin-Madison, Indiana University, Yale University, and the National Optical Astronomy Observatories.

Please wait… references are loading.
10.1086/376865