Abstract
Prompted by the detection of optical radiation from the extended lobes and jets of some radio galaxies1–3, we have begun a search for IR radiation from such sources. Initially we have observed the western lobe of 3C247 (or 3C247W) at 2.2 µm and measured a flux density of 250±27 µJy (mK = 16.0±0.1). This result shows there to be a break in the spectrum between radio and optical wavelengths, such that the IR–optical spectrum is steeper than would be predicted from the radio and optical data alone. If the spectrum of 3C247W is applicable to other sources, then IR searches are a good way of finding high frequency counterparts of lobes of radio galaxies.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Saslaw, W. C., Tyson, J. A. & Crane, P. Astrophys. J. 222, 435–449 (1978).
Butcher, H. R., van Breugel, W. & Miley, G. K. Astrophys. J. 235, 749–754 (1980).
Crane, P., Saslaw, W. C. & Tyson, J. A. Astrophys. J. 265, 681–700 (1983).
Miley, G. K. A. Rev. Astr. Astrophys. 18, 165–218 (1980).
Tucker, W. H. Radiation Processes in Astrophysics (MIT Press, 1977).
Laing, R. A., Longair, M. S., Riley, J. M., Kibblewhite, E. J. & Gunn, J. E. Mon. Not. R. astr. Soc. 183, 547–548 (1978).
Jenkins, C. J., Pooley, G. G. & Riley, J. M. Mem. R. astr. Soc. 84, 61–99 (1977).
UKIRT Observers Manual (Royal Observatory, Edinburgh, 1981).
Heiles, C. Astr. Astrophys. Suppl. 20, 37–55 (1975).
Strecker, D. W., Erickson, E. F. & Wittebron, F. C. Astrophys. J. Suppl. 41, 501–512 (1979).
Johnson, H. L. A. Rev. Astr. Astrophys. 4, 193–206 (1966).
Bahcall, J. N. & Soneira, R. M. Astrophys. J. Suppl. 47, 357–401 (1981).
Allen, C. W. Astrophysical Quantities 3rd edn, 244 (Athlone, New York, 1976).
Steppe, H., Veron, P. & Veron, M. P. Astr. Astrophys. 78, 125–128 (1979).
Braccesi, A., Zitelli, V., Bonoli, F. & Formiggini, L. Astr. Astrophys. 85, 80–92 (1980).
Kuhr, H., Nauber, U., Pauliny-Toth, I. I. K. & Witzel, A. Preprint No. 55 (Max-Planck Institut für Radioastronomie).
Laing, R. A. & Peacock, J. A. Mon. Not. R. astr. Soc. 190, 903–924 (1980).
Laing, R. A., Riley, J. M. & Longair, M. S. Preprint (University of Edinburgh, 1982).
Roger, R. S., Bridle, A. H. & Costain, C. H. Astr. J. 78, 1030–1057 (1973).
Felten, J. E. & Morrison, P. Astrophys. J. 146, 686–708 (1966).
Woody, D. P. & Richards, P. L. Phys. Rev. Lett. 42, 925–928 (1979).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Allan, P. A measurement of the IR flux from a radio lobe. Nature 303, 45–46 (1983). https://doi.org/10.1038/303045a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/303045a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
