R
Reza Ansari
Researcher at University of Paris
Publications - 46
Citations - 1791
Reza Ansari is an academic researcher from University of Paris. The author has contributed to research in topics: Gravitational microlensing & Stars. The author has an hindex of 16, co-authored 46 publications receiving 1507 citations. Previous affiliations of Reza Ansari include Université Paris-Saclay & Centre national de la recherche scientifique.
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Journal ArticleDOI
Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
P. Tisserand,L. Le Guillou,C. Afonso,J. N. Albert,Johannes Andersen,Reza Ansari,Éric Aubourg,P. Bareyre,Jean-Philippe Beaulieu,X. Charlot,Ch. Coutures,Ch. Coutures,Roger Ferlet,Pascal Fouqué,J. F. Glicenstein,Bertrand Goldman,Andrew Gould,David S. Graff,M. Gros,J. Haissinski,C. Hamadache,J. de Kat,Thierry Lasserre,E. Lesquoy,E. Lesquoy,C. Loup,C. Magneville,J. B. Marquette,E. Maurice,Anaëlle Maury,A. Milsztajn,Marc Moniez,Nathalie Palanque-Delabrouille,O. Perdereau,Y. R. Rahal,J. Rich,Michel Spiro,Alfred Vidal-Madjar,L. Vigroux,L. Vigroux,S. Zylberajch +40 more
TL;DR: The EROS-2 project was designed to test the hypothesis that massive compact halo objects (the so-called ''machos'') could be a major component of the dark matter halo of the Milky Way galaxy.
Journal ArticleDOI
Galactic Bulge microlensing optical depth from EROS-2
C. Hamadache,L. Le Guillou,P. Tisserand,C. Afonso,J. N. Albert,Johannes Andersen,Reza Ansari,Éric Aubourg,P. Bareyre,Jean-Philippe Beaulieu,X. Charlot,Ch. Coutures,Ch. Coutures,Roger Ferlet,Pascal Fouqué,J. F. Glicenstein,Bertrand Goldman,Andrew Gould,David S. Graff,M. Gros,J. Haissinski,J. de Kat,E. Lesquoy,E. Lesquoy,C. Loup,C. Magneville,J. B. Marquette,E. Maurice,Anaëlle Maury,A. Milsztajn,Marc Moniez,Nathalie Palanque-Delabrouille,O. Perdereau,Y. R. Rahal,J. Rich,Michel Spiro,Alfred Vidal-Madjar,L. Vigroux,L. Vigroux,S. Zylberajch +39 more
TL;DR: In this paper, a new EROS-2 measurement of the optical depth toward the Galactic Bulge was presented, with light curves of $5.6\times 10^{6}$ clump-giant stars distributed over $66 \deg^2$ of the Bulge during seven Bulge seasons.
Journal ArticleDOI
Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
P. Tisserand,L. Le Guillou,C. Afonso,J. N. Albert,Johannes Andersen,Reza Ansari,Éric Aubourg,P. Bareyre,Jean-Philippe Beaulieu,X. Charlot,Ch. Coutures,Ch. Coutures,Roger Ferlet,Pascal Fouqué,J. F. Glicenstein,Bertrand Goldman,Andrew Gould,David S. Graff,M. Gros,J. Haissinski,C. Hamadache,J. de Kat,Thierry Lasserre,E. Lesquoy,E. Lesquoy,C. Loup,C. Magneville,J. B. Marquette,E. Maurice,Anaëlle Maury,A. Milsztajn,Marc Moniez,Nathalie Palanque-Delabrouille,O. Perdereau,Y. R. Rahal,J. Rich,Michel Spiro,Alfred Vidal-Madjar,L. Vigroux,L. Vigroux,S. Zylberajch +40 more
TL;DR: The EROS-2 project was designed to test the hypothesis that massive compact halo objects (the so-called ''machos'') could be a major component of the dark matter halo of the Milky Way galaxy as discussed by the authors.
Journal ArticleDOI
Bulge microlensing optical depth from EROS 2 observations
C. Afonso,C. Afonso,C. Afonso,J. N. Albert,C. Alard,Johannes Andersen,Reza Ansari,Éric Aubourg,P. Bareyre,P. Bareyre,F. Bauer,Jean-Philippe Beaulieu,G. Blanc,A. Bouquet,S. Char,X. Charlot,F. Couchot,Ch. Coutures,F. Derue,F. Derue,Roger Ferlet,P. Fouque,J. F. Glicenstein,Bertrand Goldman,Bertrand Goldman,Bertrand Goldman,Andrew Gould,Andrew Gould,David S. Graff,M. Gros,J. Haissinski,C. Hamadache,Jean-Christophe Hamilton,D. Hardin,J. de Kat,A. Kim,Thierry Lasserre,L. LeGuillou,É. Lesquoy,É. Lesquoy,C. Loup,Christophe Magneville,B. Mansoux,J. B. Marquette,E. Maurice,Anaëlle Maury,A. Milsztajn,Marc Moniez,Nathalie Palanque-Delabrouille,O. Perdereau,L. Prevot,N. Regnault,J. Rich,Michel Spiro,P. Tisserand,Alfred Vidal-Madjar,L. Vigroux,S. Zylberajch +57 more
TL;DR: In this article, a measurement of the microlensing optical depth toward the Galactic bulge based on the analysis of 15 contiguous1 square degrees fields centered on (l=2.5 deg, b=-4.0 deg) and containing 1.42 million clump-giant stars (belonging to the extended clump area) monitored during almost three bulge seasons by EROS (Experience de Recherche d'Objets Sombres).
Journal ArticleDOI
Observation of microlensing toward the galactic spiral arms. EROS II 3 year survey
F. Derue,Cristina Afonso,C. Alard,J. N. Albert,Johannes Andersen,Reza Ansari,Éric Aubourg,P. Bareyre,Franz E. Bauer,J. P. Beaulieu,G. Blanc,A. Bouquet,S. Char,X. Charlot,F. Couchot,C. Coutures,Roger Ferlet,P. Fouque,J. F. Glicenstein,Bertrand Goldman,Andrew Gould,David S. Graff,M. Gros,J. Haissinski,Jean-Christophe Hamilton,D. Hardin,J. de Kat,A. Kim,T. Lasserre,L. Le Guillou,E. Lesquoy,C. Loup,Christophe Magneville,B. Mansoux,J. B. Marquette,E. Maurice,A. Milsztajn,Marc Moniez,N. Palanque-Delabrouille,O. Perdereau,L. Prevot,N. Regnault,J. Rich,Michel Spiro,Alfred Vidal-Madjar,L. Vigroux,S. Zylberajch +46 more
TL;DR: In this article, the authors present an analysis of the light curves of 9.1 million stars observed during three seasons by EROS (Expience de Recherche d'Objets Sombres), in the Galactic plane away from the bulge.