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Astron. Astrophys. 315, L297-L300 (1996)

A first glimpse into ISM/ICM connections at z=0.2 with ISOCAM*

M. Pierre1, H. Aussel1, B. Altieri2, J. Ph. Bernard3, A. Biviano2, O. Boulade1, C. Cesarsky1, D. Cesarsky3, D. Elbaz1, R. Hunstead4, L. Lemonon1, A. Reid4, and L. Vigroux1

1 CEA Saclay DSM/DAPNIA, Service d'Astrophysique, F-91191 Gif-sur-Yvette, France
2 ISO Science Operation Centre, Astrophysics Division of ESA, Villafranca del Castillo, PO Box 50727, E-28080 Madrid, Spain
3 Institut d'Astrophysique Spatiale Orsay, Université Paris XI, F-91405 Paris, France
4 Astrophysics Department, University of Sydney, NSW 2006, Australia

Received 16 July 1996 / Accepted 16 August 1996

Abstract. Although it is well established that the cluster environment affects the gas content and massive star formation in galaxies, the mechanisms have not yet been unambiguously identified. In order to elucidate some of the processes responsible, an ISO Core Programme - DEEPXSRC - is dedicated to deep observations of medium redshift rich clusters of galaxies. We present here the first results from this programme, obtained by correlating our ISOCAM observations ( at 7.5 and 15 img1.gifm) of the cluster A1732 with radio, optical and X-ray images. Some 10 distant IR galaxies are detected in an img2.gif field and are the faintest extragalactic sources detected by ISO so far.

Key words: cosmology: observations (ISO, ROSAT, Australia Telescope) - galaxies: clusters: individual Abell 1732 - infrared: galaxies - X-ray: general - radio continuum: galaxies

* Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with participation of ISAS and NASA. Also based on data obtained with the Canada-France-Hawaii Telescope, the Australia Telescope and ROSAT.

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