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

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 multiband photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results: {Omega}{sub M} = 0.263 {+-} 0.042 (stat) {+-} 0.032 (sys) for a flat {Lambda}CDM 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.

Authors:
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Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director. Office of Science. Office of High EnergyPhysics; Fundacao para a Ciencia e Tecnologia Portugal POCTI/FNU/43423and Grants SFRH/BPD/14682/2003 and SFRH/BPD/11641/2002
OSTI Identifier:
876215
Report Number(s):
LBNL-59164
Journal ID: ISSN 0004-6361; AAEJAF; R&D Project: PSUOPS; BnR: KA1301020; TRN: US0604695
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomy and Astrophysics; Journal Volume: 447; Journal Issue: 1; Related Information: Journal Publication Date: 02/2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACOUSTICS; BARYONS; COSMOLOGY; OSCILLATIONS; PHOTOMETRY; SKY; SPECTROSCOPY; SUPERNOVAE; TELESCOPES; Supernovae:general cosmology: observations

Citation Formats

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam,D., Basa, S., Carlberg, R.G., Fabbro, S., Fouchez, D., Hook, I.M., Howell, D.A., Lafoux, H., Neill, J.D., Palanque-Delabrouille, N., Perrett, K., Pritchet, C.J., Rich, J., Sullivan, M., Taillet, R., Aldering, G., Antilogus, P., Arsenijevic, V., Balland, C., Baumont, S., Bronder, J., Courtois, H., Ellis, R.S., Filiol, M., Goncalves, A.C., Goobar, A., Guide, D., Hardin, D., Lusset, V., Lidman, C., McMahon, R., Mouchet, M., Mourao, A., Perlmutter, S., Ripoche, P., Tao, C., and Walton, N.. The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set. United States: N. p., 2005. Web.
Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam,D., Basa, S., Carlberg, R.G., Fabbro, S., Fouchez, D., Hook, I.M., Howell, D.A., Lafoux, H., Neill, J.D., Palanque-Delabrouille, N., Perrett, K., Pritchet, C.J., Rich, J., Sullivan, M., Taillet, R., Aldering, G., Antilogus, P., Arsenijevic, V., Balland, C., Baumont, S., Bronder, J., Courtois, H., Ellis, R.S., Filiol, M., Goncalves, A.C., Goobar, A., Guide, D., Hardin, D., Lusset, V., Lidman, C., McMahon, R., Mouchet, M., Mourao, A., Perlmutter, S., Ripoche, P., Tao, C., & Walton, N.. The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set. United States.
Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam,D., Basa, S., Carlberg, R.G., Fabbro, S., Fouchez, D., Hook, I.M., Howell, D.A., Lafoux, H., Neill, J.D., Palanque-Delabrouille, N., Perrett, K., Pritchet, C.J., Rich, J., Sullivan, M., Taillet, R., Aldering, G., Antilogus, P., Arsenijevic, V., Balland, C., Baumont, S., Bronder, J., Courtois, H., Ellis, R.S., Filiol, M., Goncalves, A.C., Goobar, A., Guide, D., Hardin, D., Lusset, V., Lidman, C., McMahon, R., Mouchet, M., Mourao, A., Perlmutter, S., Ripoche, P., Tao, C., and Walton, N.. Fri . "The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set". United States. doi:. https://www.osti.gov/servlets/purl/876215.
@article{osti_876215,
title = {The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set},
author = {Astier, P. and Guy, J. and Regnault, N. and Pain, R. and Aubourg, E. and Balam,D. and Basa, S. and Carlberg, R.G. and Fabbro, S. and Fouchez, D. and Hook, I.M. and Howell, D.A. and Lafoux, H. and Neill, J.D. and Palanque-Delabrouille, N. and Perrett, K. and Pritchet, C.J. and Rich, J. and Sullivan, M. and Taillet, R. and Aldering, G. and Antilogus, P. and Arsenijevic, V. and Balland, C. and Baumont, S. and Bronder, J. and Courtois, H. and Ellis, R.S. and Filiol, M. and Goncalves, A.C. and Goobar, A. and Guide, D. and Hardin, D. and Lusset, V. and Lidman, C. and McMahon, R. and Mouchet, M. and Mourao, A. and Perlmutter, S. and Ripoche, P. and Tao, C. and Walton, N.},
abstractNote = {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 multiband photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results: {Omega}{sub M} = 0.263 {+-} 0.042 (stat) {+-} 0.032 (sys) for a flat {Lambda}CDM 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.},
doi = {},
journal = {Astronomy and Astrophysics},
number = 1,
volume = 447,
place = {United States},
year = {Fri Oct 14 00:00:00 EDT 2005},
month = {Fri Oct 14 00:00:00 EDT 2005}
}