P
P. Ripoche
Researcher at Lawrence Berkeley National Laboratory
Publications - 38
Citations - 7047
P. Ripoche is an academic researcher from Lawrence Berkeley National Laboratory. The author has contributed to research in topics: Redshift & Supernova. The author has an hindex of 20, co-authored 38 publications receiving 6525 citations. Previous affiliations of P. Ripoche include Pierre-and-Marie-Curie University & Centre national de la recherche scientifique.
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Journal ArticleDOI
The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set
Pierre Astier,Julien Guy,Nicolas Regnault,Reynald Pain,Éric Aubourg,David D. Balam,S. Basa,Raymond G. Carlberg,Sebastien Fabbro,Dominique Fouchez,I. M. Hook,D. A. Howell,H. Lafoux,James D. Neill,Nathalie Palanque-Delabrouille,K. Perrett,Christopher J. Pritchet,J. Rich,Mark Sullivan,Richard Taillet,Greg Aldering,P. Antilogus,V. Arsenijevic,Christophe Balland,S. Baumont,J. Bronder,Hélène M. Courtois,Rowan Ellis,M. Filiol,A. C. Gonçalves,Ariel Goobar,D. Guide,D. Hardin,V. Lusset,C. Lidman,Richard G. McMahon,M. Mouchet,A. Mourao,Saul Perlmutter,Saul Perlmutter,P. Ripoche,Charling Tao,Nicholas A. Walton +42 more
TL;DR: In this article, distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS) were presented.
Journal ArticleDOI
SALT2: using distant supernovae to improve the use of type Ia supernovae as distance indicators
Julien Guy,Pierre Astier,S. Baumont,D. Hardin,Reynald Pain,Nicolas Regnault,S. Basa,Raymond G. Carlberg,A. Conley,Sebastien Fabbro,Dominique Fouchez,I. M. Hook,D. A. Howell,Kathy Perrett,Christopher J. Pritchet,J. Rich,Mark Sullivan,P. Antilogus,Éric Aubourg,G. Bazin,J. Bronder,M. Filiol,Nathalie Palanque-Delabrouille,P. Ripoche,V. Ruhlmann-Kleider +24 more
TL;DR: In this paper, an empirical model of Type Ia supernovae spectro-photometric evolution with time is presented, which is built using a large data set including light-curves and spectra of both nearby and distant supernova, the latter being observed by the SNLS collaboration.
Journal ArticleDOI
Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
Alex Conley,Julien Guy,Mark Sullivan,Nicolas Regnault,Pierre Astier,C. Balland,S. Basa,R. G. Carlberg,D. Fouchez,D. Hardin,I. M. Hook,D. A. Howell,R. Pain,Nathalie Palanque-Delabrouille,K. Perrett,C. J. Pritchet,Jeffrey A. Rich,V. Ruhlmann-Kleider,D. Balam,S. Baumont,Richard S. Ellis,Sebastien Fabbro,H. K. Fakhouri,N. Fourmanoit,Santiago González-Gaitán,Melissa L. Graham,Michael J. Hudson,Eric Hsiao,T. Kronborg,C. Lidman,A. Mourao,James D. Neill,Saul Perlmutter,P. Ripoche,Nao Suzuki,E. S. Walker +35 more
TL;DR: In this paper, the authors combine high redshift Type Ia supernovae from the first 3 years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality joint sample of 472 SNe (123 low-$z, 93 SDSS, 242 SNLS, and 14 {\it Hubble Space Telescope}).
Journal ArticleDOI
The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints ,
Julien Guy,Mark Sullivan,Alex Conley,Alex Conley,Nicolas Regnault,Pierre Astier,Christophe Balland,Christophe Balland,Stéphane Basa,Raymond G. Carlberg,Dominique Fouchez,D. Hardin,I. M. Hook,I. M. Hook,D. A. Howell,D. A. Howell,Reynald Pain,Nathalie Palanque-Delabrouille,Kathy Perrett,Kathy Perrett,Christopher J. Pritchet,J. Rich,V. Ruhlmann-Kleider,David D. Balam,S. Baumont,Rowan Ellis,Rowan Ellis,Sebastien Fabbro,Sebastien Fabbro,H. K. Fakhouri,N. Fourmanoit,Santiago González-Gaitán,Melissa L. Graham,Eric Hsiao,T. Kronborg,C. Lidman,A. Mourao,Saul Perlmutter,P. Ripoche,P. Ripoche,Nao Suzuki,Emma S. Walker +41 more
TL;DR: In this paper, photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) were presented and their multi-colour light curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT).
Journal ArticleDOI
Rates and Properties of Type Ia Supernovae as a Function of Mass and Star Formation in Their Host Galaxies
Mark Sullivan,D. Le Borgne,Christopher J. Pritchet,A. Hodsman,James D. Neill,D. A. Howell,Raymond G. Carlberg,Pierre Astier,Éric Aubourg,David D. Balam,S. Basa,A. Conley,Sebastien Fabbro,D. Fouchez,Julien Guy,I. M. Hook,Reynald Pain,Nathalie Palanque-Delabrouille,Kathy Perrett,Nicolas Regnault,J. Rich,Richard Taillet,Richard Taillet,S. Baumont,J. Bronder,Rowan Ellis,M. Filiol,V. Lusset,Saul Perlmutter,P. Ripoche,Charling Tao +30 more
TL;DR: In this paper, the authors show that Type Ia supernovae are formed within both very young and old stellar populations, with observed rates that depend on the stellar mass and mean star formation rates (SFRs) of their host galaxies.