Astron. Astrophys. 326, 108-112 (1997)

Observations of the Fe hyperfine transition in clusters of galaxies

H. Liang ^{1, 2, 3}, J.M. Dickey ^{2, 4}, G. Moorey ² and R.D. Ekers <sup>2

1</sup> H.H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, UK
² Australia Telescope National Facilities, CSIRO, Epping, NSW 2112, Australia
³ Institut d'Astrophysique Spatiale, Université Paris XI, F-91405 Orsay Cedex, France
⁴ University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 USA

Received 3 March 1997 / Accepted 24 April 1997

Abstract

We present a search for the hyperfine transition of the ⁵⁷ Fe ion at 3.071 mm in clusters of galaxies with the ATNF Mopra telescope. The results are compared with a realistic estimate of the peak brightness temperature of the line in a cooling flow cluster A85, using the available X-ray data.

Key words: galaxies: clusters clusters of galaxies: individual Abell 85 X-rays: galaxies H ii regions: 30 Dor

Send offprint requests to: H. Liang, h.liang@bristol.ac.uk

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations
• 3. Discussions and conclusion
• Acknowledgements
• Appendix A
  • Appendix A: derivation of Eqs. (1) and (2)
• References

© European Southern Observatory (ESO) 1997

Online publication: April 20, 1998
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