Buscar
Mostrando ítems 21-30 de 234
Galaxy triplets in Sloan Digital Sky Survey Data Release 7: II. A connection with compact groups?
(Oxford University PressOxford, 2013)
We analyse a sample of 71 triplets of luminous galaxies derived from the work of O’Mill et al. We compare the properties of triplets and their members with those of control samples of compact groups, the 10 brightest members ...
AGN spiral galaxies in groups: effects of bars
(EDP Sciences, 2014-12)
AIMS: We explore properties of barred active spiral galaxies in groups and clusters selected from the Sloan Digital Sky Survey data release 7 (SDSS-DR7), with the aim of assessing the effects of bars on active galactic ...
Effects of environment on sSFR profiles of late-type galaxies in the CALIFA survey
(EDP Sciences, 2019-01-15)
We explore the effects of environment on star formation in late-type galaxies by studying the dependence of the radial profiles of specific star formation rate (sSFR) on environment and the stellar mass, using a sample of ...
MASS DISTRIBUTION IN HICKSON COMPACT GROUPS OF GALAXIES
(IOP PUBLISHING LTD, 2010)
This study presents the mass distribution for a sample of 18 late-type galaxies in nine Hickson compact groups. We used Ha rotation curves (RCs) from high-resolution two-dimensional velocity fields of Fabry-Perot observations ...
Green valley galaxies as a transition population in different environments
(Wiley Blackwell Publishing, Inc, 2018-02)
We present a comparative analysis of the properties of passive, star-forming and transition (green valley) galaxies in four discrete environments: field, groups, the outskirts and the core of X-ray clusters. We construct ...
AGNs in small galaxy systems: Comparing the main properties of active objects in pairs, triplets, and groups
(Oxford University Press, 2021-07)
We perform a comparative study of active galactic nuclei (AGNs) in pairs, triplets, and groups. To this end, we use the Duplancic et al. catalogue of small galaxy systems and consider BPT and WHAN diagnostic diagrams to ...
Following the crumbs: Statistical effects of ram pressure in galaxies
(Wiley Blackwell Publishing, Inc, 2020-02)
We analyse the presence of dust around galaxy group members through the reddening of background quasars. By taking into account quasar colour and their dependence on redshift and angular position, we derive mean quasar ...
FINDING FOSSIL GROUPS: OPTICAL IDENTIFICATION AND X-RAY CONFIRMATION
(IOP PUBLISHING LTDBRISTOL, 2012)
We report the discovery of 12 new fossil groups (FGs) of galaxies, systems dominated by a single giant elliptical galaxy and cluster-scale gravitational potential, but lacking the population of bright galaxies typically ...