pith. machine review for the scientific record. sign in

arxiv: astro-ph/0510447 · v1 · submitted 2005-10-14 · 🌌 astro-ph · astro-ph.CO

Recognition: unknown

The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set

P. Astier , J. Guy , N. Regnault , R. Pain , E. Aubourg , D. Balam , S. Basa , R.G. Carlberg
show 34 more authors
S. Fabbro D. Fouchez I.M. Hook D.A. Howell H. Lafoux J.D. Neill N. Palanque-Delabrouille K. Perrett C.J. Pritchet J. Rich M. Sullivan R. Taillet G. Aldering P. Antilogus V. Arsenijevic C. Balland S. Baumont J. Bronder H. Courtois R.S. Ellis M. Filiol A.C. Goncalves A. Goobar D. Guide D. Hardin V. Lusset C. Lidman R. McMahon M. Mouchet A. Mourao S. Perlmutter P. Ripoche C. Tao N. Walton
Authors on Pith no claims yet
classification 🌌 astro-ph astro-ph.CO
keywords yearfirstomegasurveybandscfhtdatadiagram
0
0 comments X
read the original abstract

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degree fields in four bands. Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to measure their redshift. With this data set, we have built a Hubble diagram extending to z=1, with all distance measurements involving at least two bands. Systematic uncertainties are evaluated making use of the multi-band photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results : Omega_M = 0.263 +/- 0.042(stat) +/- 0.032(sys) for a flat LambdaCDM model; and w = -1.023 +/- 0.090(stat) +/- 0.054(sys) for a flat cosmology with constant equation of state w when combined with the constraint from the recent Sloan Digital Sky Survey measurement of baryon acoustic oscillations.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Strong Progenitor Age Bias in Supernova Cosmology. III. Progenitor Age as the Physical Origin of the Type Ia Supernova Magnitude Steps with Host Properties

    astro-ph.GA 2026-05 unverdicted novelty 6.0

    Progenitor age is the primary physical driver of the host-mass and host-sSFR magnitude steps in Type Ia supernovae, with the mass step eliminated by direct age correction.

  2. From Big Bang Nucleosynthesis to Late-Time Acceleration in $f(Q,L_m)$ Gravity

    gr-qc 2026-04 unverdicted novelty 6.0

    The f(Q, L_m) gravity model fits observational data from BBN to late-time acceleration, acting as a viable quintessence-like alternative to the standard LambdaCDM model.

  3. Modified Gravity and Cosmology

    astro-ph.CO 2011-06 unverdicted novelty 2.0

    A comprehensive review of modified gravity theories and their cosmological consequences, including a parameterized post-Friedmannian formalism for constraining deviations from General Relativity.