J
Julien Guy
Researcher at Lawrence Berkeley National Laboratory
Publications - 70
Citations - 5467
Julien Guy is an academic researcher from Lawrence Berkeley National Laboratory. The author has contributed to research in topics: Supernova & Redshift. The author has an hindex of 31, co-authored 70 publications receiving 5062 citations. Previous affiliations of Julien Guy include Paris Diderot University & University of Paris.
Papers
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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
Evidence of Environmental Dependencies of Type Ia Supernovae from the Nearby Supernova Factory indicated by Local H$\alpha$
M. Rigault,Y. Copin,Greg Aldering,P. Antilogus,Cecilia Aragon,Stephen Bailey,C. Baltay,S. Bongard,C. Buton,A. Canto,F. Cellier-Holzem,M. J. Childress,N. Chotard,H. K. Fakhouri,H. K. Fakhouri,U. Feindt,M. Fleury,E. Gangler,P. Greskovic,Julien Guy,A. G. Kim,M. Kowalski,Simona Lombardo,Jakob Nordin,Jakob Nordin,Peter Nugent,Peter Nugent,Reynald Pain,E. Pecontal,R. Pereira,Saul Perlmutter,Saul Perlmutter,David Rabinowitz,K. Runge,C. Saunders,Richard Scalzo,G. Smadja,Charling Tao,R. C. Thomas,Benjamin A. Weaver +39 more
TL;DR: In this paper, the authors study the host galaxy regions in close proximity to Type Ia supernovae (SNe Ia) in order to analyze relations between the properties of SN Ia events and environments where their progenitors most likely formed.
Journal ArticleDOI
The Effect of Progenitor Age and Metallicity on Luminosity and 56Ni Yield in Type Ia Supernovae
D. A. Howell,D. A. Howell,D. A. Howell,Mark Sullivan,Mark Sullivan,Edward F. Brown,A. Conley,D. Le Borgne,Eric Hsiao,Pierre Astier,David D. Balam,Christophe Balland,S. Basa,Raymond G. Carlberg,D. Fouchez,Julien Guy,D. Hardin,I. M. Hook,Reynald Pain,Kathy Perrett,Christopher J. Pritchet,Nicolas Regnault,S. Baumont,J. Le Du,Christopher Lidman,Saul Perlmutter,Saul Perlmutter,Nao Suzuki,Emma S. Walker,John C Wheeler +29 more
TL;DR: In this article, a new method for estimating bolometric luminosity and 56Ni yield in Type Ia supernovae (SNe Ia) was developed and used to test the theory with data from the Supernova Legacy Survey.
Journal ArticleDOI
Host Galaxy Properties and Hubble Residuals of Type Ia Supernovae from the Nearby Supernova Factory
M. J. Childress,Greg Aldering,P. Antilogus,Cecilia Aragon,Stephen Bailey,C. Baltay,S. Bongard,C. Buton,A. Canto,F. Cellier-Holzem,N. Chotard,Y. Copin,H. K. Fakhouri,H. K. Fakhouri,E. Gangler,Julien Guy,Eric Hsiao,M. Kerschhaggl,A. G. Kim,M. Kowalski,S. C. Loken,Peter Nugent,K. Paech,Reynald Pain,E. Pecontal,R. Pereira,Saul Perlmutter,Saul Perlmutter,David Rabinowitz,M. Rigault,K. Runge,Richard Scalzo,G. Smadja,Charling Tao,Charling Tao,R. C. Thomas,Benjamin A. Weaver,Chen Wu,Chen Wu +38 more
TL;DR: This paper examined the relationship between Type Ia supernova (SN Ia) Hubble residuals and the properties of their host galaxies using a sample of 115 SNe Ia from the Nearby Supernova Factory.
Journal ArticleDOI
Is there Evidence for a Hubble bubble? The Nature of Type Ia Supernova Colors and Dust in External Galaxies
A. Conley,Raymond G. Carlberg,Julien Guy,D. A. Howell,Saurabh Jha,Adam G. Riess,Adam G. Riess,Mark Sullivan +7 more
TL;DR: In this article, the authors examine recent evidence from the luminosity-redshift relation of Type Ia supernovae for the detection of a "Hubble bubble" -a departure of the local value of the Hubble constant from its globally averaged value, and demonstrate that this is related to the interpretation of SN color excesses and the presence of a color gradient across the local sample.