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

P. Serra*, R. Morganti, T. A. Oosterloo, K. Alatalo, L. Blitz, M. Bois, R. C. E. Van Den Bosch, F. Bournaud, M. Bureau, M. Cappellari, R. L. Davies, T. A. Davis, P. Duc, E. Emsellem, J. Falcón-Barroso, S. Khochfar, D. Krajnović, H. Kuntschner, P. Y. Lablanche, R. M. McDermidT. Naab, M. Sarzi, N. Scott, G. Van De Ven, A. Weijmans, L. M. Young, P. T. De Zeeuw

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

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Abstract

We present a preliminary analysis of the H I 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 H I properties on environment. We detect H I in about half of the galaxies outside Virgo. For these systems, the H I 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 H I. We discuss future work in this field which will be enabled by next-generation, pre-SKA radio instruments. We present a simulated Apertif H I observation of an ATLAS3D early-type galaxy, showing how its appearance and detection level vary as a function of redshift.

Original languageEnglish
Title of host publicationPRA 2009
Subtitle of host publicationPanoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution
Place of PublicationGroningen, the Netherlands
PublisherScuola Internazionale Superiore di Studi Avanzati (SISSA)
Number of pages6
DOIs
Publication statusPublished - 1 Jan 2009
Externally publishedYes
Event2009 Panoramic Radio Astronomy: Wide-Field 1-2 GHz Research on Galaxy Evolution, PRA 2009 - Groningen, Netherlands
Duration: 2 Jun 20095 Jun 2009

Publication series

NameProceedings of Science
PublisherSISSA
Volume89
ISSN (Print)1824-8039

Conference

Conference2009 Panoramic Radio Astronomy: Wide-Field 1-2 GHz Research on Galaxy Evolution, PRA 2009
CountryNetherlands
CityGroningen
Period2/06/095/06/09

Bibliographical note

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