SIMBAD references

2011ApJ...736..154M - Astrophys. J., 736, 154 (2011/August-1)

Tracing rejuvenation events in nearby S0 galaxies.

MARINO A., BIANCHI L., RAMPAZZO R., THILKER D.A., ANNIBALI F., BRESSAN A. and BUSON L.M.

Abstract (from CDS):

With the aim of characterizing rejuvenation processes in early-type galaxies, we analyzed five barred S0 galaxies showing a prominent outer ring in ultraviolet (UV) imaging. We analyzed Galaxy Evolution Explorer far-UV (FUV) and near-UV (NUV), and optical data using stellar population models and estimated the age and the stellar mass of the entire galaxies and the UV-bright ring structures. Outer rings consist of young ( ≲ 200 Myr old) stellar populations, accounting for up to 70% of the FUV flux but containing only a few percent of the total stellar mass. Integrated photometry of the whole galaxies places four of these objects on the green valley, indicating a globally evolving nature. We suggest such galaxy evolution is likely driven by bar-induced instabilities, i.e., inner secular evolution, that conveys gas to the nucleus and the outer rings. At the same time, H I observations of NGC 1533 and NGC 2962 suggest external gas re-fueling can play a role in the rejuvenation processes of such galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: structure

Simbad objects: 21

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2011ApJ...736..154M and select 'bookmark this link' or equivalent in the popup menu


2021.03.03-11:22:38

© Université de Strasbourg/CNRS

    • Contact