Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Guimarães, Antonio C. C."'
Publikováno v:
Class. Quantum Grav. 28 (2011) 125026
A possible slowing down of the cosmic expansion is investigated through a cosmographic approach. By expanding the luminosity distance to fourth order and fitting the SN Ia data from the most recent compilations (Union, Constitution and Union 2), the
Externí odkaz:
http://arxiv.org/abs/1005.2986
Publikováno v:
Astrophys.J.728:33,2011
Data from 58 strong-lensing events surveyed by the Sloan Lens ACS Survey are used to estimate the projected galaxy mass inside their Einstein radii by two independent methods: stellar dynamics and strong gravitational lensing. We perform a joint anal
Externí odkaz:
http://arxiv.org/abs/0904.4381
We readdress the calculation of the mass of early-type galaxies using strong gravitational lensing and stellar dynamics. Our sample comprises 27 galaxies in the Sloan Lens ACS (SLACS) Survey. Comparing the mass estimates from these two independent me
Externí odkaz:
http://arxiv.org/abs/0706.3098
Autor:
Guimarães, Antonio C. C.
Publikováno v:
Braz.J.Phys. 35 (2005) 1179-1184
We review observations and gravitational lensing theory related to the magnification of background QSOs by intervening overdensities, and the induced cross-correlation between sources and foreground galaxies. We pay special attention to simulations,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510719
Publikováno v:
Mon.Not.Roy.Astron.Soc. 362 (2005) 657-665
We simulated both the matter and light (galaxy) distributions in a wedge of the universe and calculated the gravitational lensing magnification caused by the mass along the line of sight of galaxies and galaxy groups identified in sky surveys. A larg
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409484
Autor:
Guimarães, Antonio C. C.
I investigate through simulations the redshift dependence of several lensing measures for two cosmological models, a flat universe with a cosmological constant (\LambdaCDM), and an open universe (OCDM). I argue that quintessence models can be seen as
Externí odkaz:
http://arxiv.org/abs/astro-ph/0304342
Autor:
Guimarães, Antonio C. C.
Publikováno v:
ASP Conf.Ser. 283 (2002) 90
Weak gravitational lensing is a promising tool for the study of the mass distribution in the Universe. Here we report some partial results that show how lensing maps can be used to differentiate between cosmological models. We pay special attention t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112233
Publikováno v:
Mon.Not.Roy.Astron.Soc. 325 (2001) 278
Observational evidence shows that gravitational lensing induces an angular correlation between the distribution of galaxies and much more distant QSOs. We use weak gravitational lensing theory to calculate this angular correlation, updating previous
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010104
Publikováno v:
Phys.Rev. D57 (1998) 4461-4466
We discuss the influence of the background thermal bath on the depolarization of electrons in high-energy storage rings, and on the photon emission associated with the spin flip. We focus, in particular, on electrons at LEP. We show that in a certain
Externí odkaz:
http://arxiv.org/abs/hep-ph/9703309
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.