An H I view of the on-going assembly of early-type galaxies: present and future observations

Serra, P.; Morganti, R.; Oosterloo, T.; Alatalo, K.; Blitz, L.; Bois, M.; van den Bosch, R.; Bournaud, F.; Bureau, M.; Cappellary, M.; Davies, R.; Davis, T.; Duc, P. A.; Emsellem, E.; Falcon-Barroso, J.; Khochfar, S.; Krajnovic, D.; Kuntschner, H.; Lablanche, P. Y.; McDermid, R.; Naab, T.; Sarzi, M.; Scott, N.; van de Ven, G.; Weijmans, A. M.; Young, L.; de Zeeuw, T.
Referencia bibliográfica

"Proceedings of Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution. June 2-5 2009. Groningen, the Netherlands. Edited by G. Heald and P. Serra. Published online at http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=89, id.56"

Fecha de publicación:
0
2009
Número de autores
27
Número de autores del IAC
0
Número de citas
2
Número de citas referidas
2
Descripción
We present a preliminary analysis of the HI properties of early-type galaxies in the ATLAS3D sample. Using WSRT data for ~100 galaxies outside the Virgo cluster and data from the Alfalfa project for galaxies inside Virgo, we discuss the dependence of HI properties on environment. We detect HI in about half of the galaxies outside Virgo. For these systems, the HI morphology and kinematics change as a function of environment, going from regular, rotating systems around isolated galaxies to progressively more disturbed structures for galaxies with neighbours or in groups. In denser environment, inside Virgo, nearly none of the galaxies contains HI. We discuss future work in this field which will be enabled by next-generation, pre-SKA radio instruments. We present a simulated Apertif HI observation of an ATLAS3D early-type galaxy, showing how its appearance and detection level vary as a function of redshift.