The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints

Details The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints

2010-10-22

arxiv.org/abs/1010.4743v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

(The SNLS Collaboration) 40 pages, 32 figures, Accepted in A&A

Scientific paper

We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). These events were detected and their multi-colour 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 redshifts. Systematic uncertainties arising from light curve modeling are studied, making use of two techniques to derive the peak magnitude, shape and colour of the supernovae, and taking advantage of a precise calibration of the SNLS fields. A flat LambdaCDM cosmological fit to 231 SNLS high redshift Type Ia supernovae alone gives Omega_M = 0.211 +/- 0.034(stat) +/- 0.069(sys). The dominant systematic uncertainty comes from uncertainties in the photometric calibration. Systematic uncertainties from light curve fitters come next with a total contribution of +/- 0.026 on Omega_M. No clear evidence is found for a possible evolution of the slope (beta) of the colour-luminosity relation with redshift.

Affiliated with

Also associated with

No associations

Rating

The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-660721