Early-type galaxies in different environments : an H I view

Oosterloo, Tom
Morganti, Raffaella
Weijmans, Anne-Marie
Crocker, Alison
Jütte, Eva
Cappellari, Michele
de Zeeuw, Tim
Krajnović, Davor
McDermid, Richard
Kuntschner, Harald
Sarzi, Marc

Open link

Publication date

January 2010

DOI

10.1111/j.1365-2966.2010.17351.x

Publisher

Wiley

Journal

Monthly Notices of the Royal Astronomical Society

Abstract

We present an analysis of deep Westerbork Synthesis Radio Telescope observations of the neutral hydrogen in 33 nearby early-type galaxies selected from a representative sample studied earlier at optical wavelengths with the SAURON integral-field spectrograph. This is the deepest homogeneous set of H I imaging data available for this class of objects. The sample covers both field environments and the Virgo cluster. Our analysis shows that gas accretion plays a role in the evolution of field early-type galaxies, but less so for those in clusters.The H-i properties of SAURON early-type galaxies strongly depend on environment. For detection limits of a few times 10⁶ M⊙, H I is detected in about 2/3 of the field galaxies, while <10 per cent of t...