Search
Now showing items 1-10 of 12
Star formation and nuclear activity in close pairs of early-type galaxies
(2009-11-01)
We extract from the Sloan Digital Sky Survey a sample of 347 systems involving early-type galaxies separated by less than 30 kpc, in projection, and 500 km s−1 in radial velocity. These close pairs are likely progenitors ...
GALICS II : The [ α/Fe]-mass relation in elliptical galaxies
(2009-10-03)
Aims. We test whether the mass-and σ-[α/Fe] relations in the stellar populations of early-type galaxies can be reproduced by a cosmologically motivated assembly history for spheroids.Methods. We implement a detailed treatment ...
Identifying the progenitor set of present-day early-type galaxies : A view from the standard model
(2009-08-01)
We present a comprehensive theoretical study, using a semi-analytical model within the standard LCDM framework, of the photometric properties of the progenitors of present-day early-type galaxies in the redshift range 0 ...
On the formation of massive galaxies : A simultaneous study of number density, size and intrinsic colour evolution in GOODS
(2009-07-01)
The evolution of number density, size and intrinsic colour is determined for a volume-limited sample of visually classified early-type galaxies selected from the Hubble Space Telescope/Advanced Camera for Surveys images ...
AGN jet-induced feedback in galaxies - II : Galaxy colours from a multicloud simulation
(2009-06-01)
We study the feedback from an active galactic nucleus (AGN) on stellar formation within its host galaxy, mainly using one high-resolution numerical simulation of the jet propagation within the interstellar medium (ISM) of ...
Exploring the formation of spheroidal galaxies out to z ∼ 1.5 in GOODS
(2009-05-01)
The formation of massive spheroidal galaxies is studied on a visually classified sample extracted from the Advanced Camera for Surveys/Hubble Space Telescope (ACS/HST) images of the Great Observatories Origins Deep Survey ...
Evidence for recent star formation in BCGs : A correspondence between blue cores and UV excess
(2009-05-01)
We present a joint analysis of near-ultraviolet (NUV) data from the GALEX (Galaxy Evolution Explorer) mission and (optical) colour profiles for a sample of seven brightest cluster galaxies (BCGs) in the Canadian Cluster ...
The role of minor mergers in the recent star formation history of early-type galaxies
(2009-04-01)
We demonstrate that the large scatter in the ultraviolet (UV) colours of intermediate-mass early-type galaxies in the local Universe and the inferred low-level recent star formation (RSF) in these objects can be reproduced ...
An ultraviolet study of nearby luminous infrared galaxies : Star formation histories and the role of AGN
(2009-04-01)
We employ ultraviolet (UV) and optical photometry, from the Galaxy Evolution Explorer (GALEX) and Sloan Digital Sky Survey (SDSS) surveys, respectively, to study the star formation histories (SFHs) of 561 luminous infrared ...
Do moderate-luminosity active galactic nuclei suppress star formation?
(2009)
The growth of supermassive black holes and their host galaxies are thought to be linked, but the precise nature of this symbiotic relationship is still poorly understood. Both observations and simulations of galaxy formation ...