Astron. Astrophys. 349, 406-410 (1999)

ISO far-infrared observations of rich galaxy clusters ^*

I. Abell 2670

L. Hansen ¹, H.E. Jorgensen ¹, H.U. Norgaard-Nielsen ², K. Pedersen ², P. Goudfrooij ^{**  3} and M.J.D. Linden-Vornle <sup>1,2

1</sup> Copenhagen University Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark
² Danish Space Research Institute, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark
³ Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

Received 7 June 1999 / Accepted 19 July 1999

Abstract

As part of an investigation of far-infrared emission from rich galaxy clusters the central part of Abell 2670 has been mapped with ISO at , , , and using the PHT-C camera. Point sources detected in the field have infrared fluxes comparable to normal spirals at the cluster distance. Probable optical counterparts are cluster galaxies with various characteristics such as blue colour, H emission, or double nuclei. One source is extended which could possibly be emission from intracluster dust in debris from spiral galaxies.

Key words: galaxies: clusters: individual: Abell 2670 infrared: galaxies

* Based on observations with ISO, an ESA project with instruments founded by ESA member states (especially the PI countries: France, Germany, the Netherlands, and the United Kingdom) and with the participation of ISAS and NASA
** Affiliated to the Astrophysics Division, Space Science Department, European Space Agency

Send offprint requests to: L. Hansen

Correspondence to: leif@astro.ku.dk

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations
  • 2.1. The ISO data
  • 2.2. Reductions
  • 2.3. Optical imaging
  • 2.4. X-ray and radio sources
• 3. Results
  • 3.1. Flux measurements
  • 3.2. ISO sources
• 4. Discussion
• Acknowledgements
• References

© European Southern Observatory (ESO) 1999

Online publication: September 2, 1999
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