Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Capelato, Hugo"'
We revisit the "two-component virial theorem" (2VT) in the light of recent theoretical and observational results related to the "dark matter"(DM) problem. This modification of the virial theorem offers a physically meaningful framework to investigate
Externí odkaz:
http://arxiv.org/abs/1705.02918
Weak lensing and spectroscopic analysis of the nearby dissociative merging galaxy cluster Abell 3376
Autor:
Monteiro-Oliveira, Rogério, Neto, Gastão B. Lima, Cypriano, Eduardo S., Machado, Rubens E. G., Capelato, Hugo V., Laganá, Tatiana F., Durret, Florence, Bagchi, Joydeep
The galaxy cluster Abell~3376 is a nearby (z=0.046) dissociative merging cluster surrounded by two prominent radio relics and showing an X-ray comet-like morphology. The merger system is comprised of the subclusters A3376W & A3376E. Based on new deep
Externí odkaz:
http://arxiv.org/abs/1612.07935
Autor:
Durret, Florence, Marquez, Isabel, Acebron, Ana, Adami, Christophe, Cabrera-Lavers, Antonio, Capelato, Hugo, Martinet, Nicolas, Sarron, Florian, Ulmer, Melville P.
Publikováno v:
A&A 588, A69 (2016)
Clusters of galaxies are at the intersection of cosmic filaments and are still accreting galaxies and groups along these preferential directions, but, because of their relatively low contrast on the sky, they are difficult to detect (unless a large a
Externí odkaz:
http://arxiv.org/abs/1601.07694
Autor:
Proust, Dominique, Yegorova, Irina, Saviane, Ivo, Ivanov, Valentin D., Bresolin, Fabio, Salzer, John J., Capelato, Hugo V.
We present a dynamical analysis of the galaxy cluster AC114 based on a catalogue of 524 velocities. Of these, 169 (32%) are newly obtained at ESO (Chile) with the VLT and the VIMOS spectrograph. Data on individual galaxies are presented and the accur
Externí odkaz:
http://arxiv.org/abs/1507.03273
As a part of our galaxy-cluster redshift survey, we present a set of 80 new velocities in the 4 clusters Abell 376, Abell 970, Abell 1356, and Abell 2244, obtained at Haute-Provence observatory. This set now completes our previous analysis, especiall
Externí odkaz:
http://arxiv.org/abs/1003.2954
Publikováno v:
Mon.Not.Roy.Astron.Soc. 340 (2003) 398
We present a new set of dissipationless N-body simulations aiming to better understand the pure dynamical aspects of the ``Fundamental Plane'' (FP) of elliptical galaxies. We have extended our previous hierarchical merger scheme by considering the He
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211251
Publikováno v:
Astron.Astrophys. 384 (2002) 772
Following on from the numerical work of Capelato, de Carvalho & Carlberg (1995, 1997), where dissipationless merger simulations were shown to reproduce the "Fundamental Plane" (FP) of elliptical galaxies, we investigate whether the end products of pu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201247
Publikováno v:
ApJ 528, L5 (2000)
Motivated by present indirect evidences that galaxies are surrounded by dark matter halos, we investigate whether their physical properties can be described by a formulation of the virial theorem which explicitly takes into account the gravitational
Externí odkaz:
http://arxiv.org/abs/astro-ph/9910541
We present the analysis of the spectra of 62 galaxies in 15 compact groups. The galaxies were classified in four activity classes: galaxies without emission, starburst nucleus galaxies (SBNGs), luminous AGNs and low-luminosity AGNs (LLAGNs). The star
Externí odkaz:
http://arxiv.org/abs/astro-ph/9806006
We present the results of the spectral classification of the 82 brightest galaxies in a sample of 17 compact groups. We verify that the AGNs are preferentially located in the most early-type and luminous galaxies of the groups, as is usually observed
Externí odkaz:
http://arxiv.org/abs/astro-ph/9709098