Restframe I-band Hubble diagram for type Ia supernovae up toredshift z ~; 0.5

Journal Article · Fri Apr 01 00:00:00 EST 2005 · Astronomy and Astrophysics

DOI:https://doi.org/10.1051/0004-6361:20042463· OSTI ID:860914

Nobili, S; Amanullah, R; Garavini, G; Goobar, A; Lidman, C; Stanishev, V; Aldering, G; Antilogus, P; Astier, P; Burns, M S; Conley, A; Deustua, S E; Ellis, R; Fabbro, S; Fadeyev, V; Folatelli, G; Gibbons, R; Goldhaber, G; Groom, D E; Hook, I ; Howell, D A; Kim, A G; Knop, R A; Nugent, P E; Pain, R; Perlmutter, S; Quimby, R; Raux, J; Regnault, N; Ruiz-Lapuente, P; Sainton, G; Schahmaneche, K; Smith, E; Spadafora, A L; Thomas, R C; Wang, L

We present a novel technique for fitting rest frame I-bandlight curves on a data set of 42 type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the subset at 0.01 < z < 0.1. Adding two SNe at z {approx} 0.5 yields results consistent with a flat Lambda-dominated ''concordance universe'' (OmegaM,Omega Lambda) = (0.25, 0.75). For one of these, SN 2000fr, new near infrared data are presented. The high redshift supernova NIR data are also used to test for systematic effects in the use of SNe Ia as distance estimators. A flat, Lambda = 0, universe where the faintness of supernovae at z {approx} 0.5 is due to grey dust homogeneously distributed in the intergalactic medium is disfavored based on the high-z Hubble diagram using this small data-set. However, the uncertainties are large and no firm conclusion may be drawn. We explore the possibility of setting limits on intergalactic dust based on B - I and B - V color measurements, and conclude that about 20 well measured SNe are needed to give statistically significant results. We also show that the high redshift restframe I-band data points are better fit by light curve templates that show a prominent second peak, suggesting that they are not intrinsically underluminous.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of High EnergyPhysics; National Aeronautics and Space Administration GrantHST-GO-0834601-A and Coontract NAS 5-26555; Swedish Research Council,Royal Swedish Academy Research Fellow, Knut and Alice WallenbergFoundation
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 860914
• Report Number(s): LBNL--58330; BnR: KJ0102000
• Journal Information: Astronomy and Astrophysics, Journal Name: Astronomy and Astrophysics Vol. 437; ISSN AAEJAF; ISSN 0004-6361
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLOR
COSMOLOGY
DUSTS
SUPERNOVAE
UNIVERSE
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