Zobrazeno 1 - 10
of 728
pro vyhledávání: '"Foex, P"'
Autor:
Carrasco, E. R., Verdugo, T., Motta, V., Foëx, G., Ellingson, E., Gomez, P. L., Falco, E., Limousin, M.
We present an optical study of the strong lensing galaxy cluster MS 0440.5$+$0204 at $z=0.19593$, based on CFHT/MegaCam g', r'-photometry and GMOS/Gemini and CFHT/MOS/SIS spectroscopy in a broader area compared to previous works. We have determined n
Externí odkaz:
http://arxiv.org/abs/2106.15583
Autor:
Verdugo, Tomás, Carrasco, Eleazar R., Foëx, Gael, Motta, Verónica, Gomez, Percy L., Limousin, Marceau, Magaña, Juan, de Diego, José A.
We present a parametric strong lensing modeling of the galaxy cluster MS\,0440.5+0204 (located at $z$ = 0.19). We have performed a strong lensing mass reconstruction of the cluster using three different models. The first model uses the image position
Externí odkaz:
http://arxiv.org/abs/2006.03927
Substructures in galaxy clusters: a comparative X-ray and photometric analysis of the REXCESS sample
Autor:
Foëx, Gaël
The main goals of the present work are (i) to study the substructure content of a representative, X-ray selected sample of 31 galaxy clusters, as traced by the spatial distribution of their red-sequence galaxies, and (ii) to compare it to that observ
Externí odkaz:
http://arxiv.org/abs/1901.09198
Publikováno v:
A&A 606, A122 (2017)
The main goal of this work is to compare the results of three dynamical mass estimators to the X-ray hydrostatic values, focussing on massive galaxy clusters at intermediate redshifts $z\sim0.3$. We estimated dynamical masses with the virial theorem,
Externí odkaz:
http://arxiv.org/abs/1707.05985
In this paper we study the cosmic acceleration for five dynamical dark energy models whose equation of state varies with redshift. The cosmological parameters of these models are constrained by performing a MCMC analysis using mainly gas mass fractio
Externí odkaz:
http://arxiv.org/abs/1703.08521
Publikováno v:
A&A 601, A145 (2017)
The hierarchical model of structure formation is a key prediction of the Lambda cold dark matter model, which can be tested by studying the large-scale environment and the substructure content of massive galaxy clusters. We present here a detailed an
Externí odkaz:
http://arxiv.org/abs/1703.02763
We present a weak lensing analysis of a sample of SDSS Compact Groups (CGs). Using the measured radial density contrast profile, we derive the average masses under the assumption of spherical symmetry, obtaining a velocity dispersion for the Singular
Externí odkaz:
http://arxiv.org/abs/1702.00402
Autor:
Gonzalez, Elizabeth Johana, Rodriguez, Facundo, Lambas, Diego García, Merchán, Manuel, Foëx, Gael, Chalela, Martín
We study the mass-richness relation using galaxy catalogues and images from the Sloan Digital Sky Survey. We use two independent methods, in the first one, we calibrate the scaling relation with weak-lensing mass estimates. In the second procedure we
Externí odkaz:
http://arxiv.org/abs/1610.09383
Autor:
Verdugo, T., Limousin, M., Motta, V., Mamon, G. A., Foëx, G., Gastaldello, F., Jullo, E., Biviano, A., Rojas, K., Muñoz, R. P., Cabanac, R., Magaña, J., Fernández-Trincado, J. G., Adame, L., De Leo, M. A.
Publikováno v:
A&A 595, A30 (2016)
We present a new framework were we simultaneously fit strong lensing (SL) and dynamical data. The SL analysis is based on LENSTOOL, and the dynamical analysis uses MAMPOSSt code, which we have integrated into LENSTOOL. After describing the implementa
Externí odkaz:
http://arxiv.org/abs/1608.03687
Publikováno v:
A&A 581, A31 (2015)
We present an optical analysis of a sample of 11 clusters built from the EXCPRES sample of X-ray selected clusters at intermediate redshift (z ~ 0.5). With a careful selection of the background galaxies we provide the mass maps reconstructed from the
Externí odkaz:
http://arxiv.org/abs/1505.01031