Early-type galaxies (ETGs) exhibit kinematically distinct slow and fast rotator (SR, FR) morphologies. The former are much less common (10% of ETGs), but their incidence is higher in the core of the Virgo Cluster (25%). Here we present FLAMES/GIRAFFE integral field spectroscopy of 30 galaxies in the massive cluster Abell 1689 at z = 0.183. Abell 1689 has a density 30 times higher than that of Virgo, making it the ideal place to test the effects of environment, such as local density and cluster properties. We find 4.5 ± 1.0 SRs (or an average ETG fraction, ƒSR, of 0.15 ± 0.03) in Abell 1689, identical to the value for field/groups in ATLAS3D. Within Abell 1689 ƒSR increases towards the centre, exceeding the value found in the core of Virgo. This work is the highest redshift study of its kind....
Angular Momentum of Galaxies in the Densest Environments: A FLAMES/GIRAFFE IFS Study of the Massive Cluster Abell 1689 at z = 0.18
Dalla Bontà, E.
2013
Abstract
Early-type galaxies (ETGs) exhibit kinematically distinct slow and fast rotator (SR, FR) morphologies. The former are much less common (10% of ETGs), but their incidence is higher in the core of the Virgo Cluster (25%). Here we present FLAMES/GIRAFFE integral field spectroscopy of 30 galaxies in the massive cluster Abell 1689 at z = 0.183. Abell 1689 has a density 30 times higher than that of Virgo, making it the ideal place to test the effects of environment, such as local density and cluster properties. We find 4.5 ± 1.0 SRs (or an average ETG fraction, ƒSR, of 0.15 ± 0.03) in Abell 1689, identical to the value for field/groups in ATLAS3D. Within Abell 1689 ƒSR increases towards the centre, exceeding the value found in the core of Virgo. This work is the highest redshift study of its kind....
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
