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2003ApJ...594....1T -
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Astrophys. J., 594, 1-24 (2003/September-1)
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Cosmological results from high-z supernovae.
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TONRY J.L., SCHMIDT B.P., BARRIS B., CANDIA P., CHALLIS P., CLOCCHIATTI A., COIL A.L., FILIPPENKO A.V., GARNAVICH P., HOGAN C., HOLLAND S.T., JHA S., KIRSHNER R.P., KRISCIUNAS K., LEIBUNDGUT B., LI W., MATHESON T., PHILLIPS M.M., RIESS A.G., SCHOMMER R., SMITH R.C., SOLLERMAN J., SPYROMILIO J., STUBBS C.W. and SUNTZEFF N.B.
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Abstract (from CDS):
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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)x10^{–4}h^{3}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 H_{0}t_{0}=0.96±0.04, and Ω_{Λ}-1.4Ω_{M}=0.35±0.14. Including the constraint of a flat universe, we find Ω_{M}=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 Ω_{M} 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.

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Abstract Copyright:
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∼

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Journal keyword(s):
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Cosmology: Cosmological Parameters - Cosmology: Observations - Cosmology: Distance Scale - Galaxies: Distances and Redshifts - Stars: Supernovae: General
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VizieR on-line data:
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<Available at CDS (J/ApJ/594/1): table12.dat table4.dat table5.dat table6.dat table8.dat refs.dat>

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Nomenclature:
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Table 4: [TSB2003] JHHMMSS.s+DDMMSS N=85.

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Simbad objects:
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439

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2023.09.27-23:12:35

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