Hostname: page-component-6bf8c574d5-h6jzd Total loading time: 0.001 Render date: 2025-02-22T13:16:14.277Z Has data issue: false hasContentIssue false
  • English
  • Français

Hydrogen-line observations on the coma cluster

Published online by Cambridge University Press:  14 August 2015

C. A. Muller
C. A. Muller*
Affiliation:
Radio Observatory, Dwingeloo, The Netherlands

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In 1956 and 1958 Heeschen [1, 2] reported hydrogen-line radiation at 21 cm from the Coma cluster of galaxies. He found a maximum antenna temperature of 2 °K and gave a profile with a width of about 4 Mc/s. From his details, it seems clear that these results depend mainly on a large number of drift curves on a frequency of 1386.9 Mc/s, since the accuracy of other points of the profile was much lower. Because the intensity is low and near the limit of what can be observed with present-day receivers we decided to repeat some of the observations with the 21-cm equipment at Dwingeloo.

Type
Part IV: The Large-Scale Structure of Galaxies
Information
Symposium - International Astronomical Union , Volume 9: Paris Symposium on Radio Astronomy , 1959 , pp. 465
Copyright
Copyright © Stanford University Press 1959 

References

1. Heeschen, D. S. Ap. J. 124, 660, 1956.Google Scholar
2. Heeschen, D. S., and Dieter, N. H. Proc. I.R.E. 46, 234, 1958.Google Scholar