Physical Sciences: Search for Millimetre-wave Emission from Blue Stellar Objects


ACCORDING to the list of Burbidge and Burbidge1, there are now 30 “radio-quiet” quasi-stellar objects, or QSOs (hereinafter called blue stellar objects, or BSOs) with measured redshifts. The term “radio-quiet” here means that they were selected optically and have not been identified in any general survey of radio sources. A number of BSOs have been examined by several different observers for possible radio emission on wavelengths from 94 to 2 cm, nearly always with negative results. In spite of this lack of success, a new survey of BSOs at millimetre wavelengths was felt worthwhile. No extensive surveys have been made at less than 11 cm wavelength; Kellermann and Pauliny-Toth2 observed only three BSOs at 2 cm, with no detections. Many known QSOs have high surface brightness and hence positive spectral indices at short centimetre wavelengths3; thus BSOs might well be detectable only at short wavelengths.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Burbidge, G. R., and Burbidge, E. M., Nature, 222, 735 (1969).

  2. 2

    Kellermann, K. I., and Pauliny-Toth, I. I. K., Nature, 212, 781 (1966).

  3. 3

    Kellermann, K. I., and Pauliny-Toth, I. I. K., Astrophys. J., 155, L71 (1969).

  4. 4

    Braccesi, A., Nuovo Cim., 49B, 151 (1967).

  5. 5

    Braccesi, A., Lynds, R., and Sandage, A., Astrophys. J., 152, L105 (1968).

  6. 6

    Braccesi, A., Fanti, R., Giovannini, C., and Vespignani, G., Astrophys. J., 143, 600 (1966).

  7. 7

    Fanti-Giovannini, C., and Fanti, R., Nuovo Cim., 49B, 154 (1967).

  8. 8

    Grueff, G., Astrophys. J., 160, L41 (1970).

  9. 9

    Grewing, M., and Ristow, D., Beit. z. Radioastronomie (MPI-Bonn), 1, 90 (1968).

  10. 10

    Lang, K. R., and Terzian, Y., Astrophys. J., 158, L11 (1969).

  11. 11

    Shapiro, I. I., and Weinreb, S., Astrophys. J., 143, 598 (1966).

  12. 12

    Longair, M. S., and Scheuer, P. A. G., Nature, 215, 919 (1967).

  13. 13

    Bolton, J. G., Astron. J., 74, 131 (1969).

  14. 14

    Heeschen, D. S., Astrophys. J., 146, 517 (1966).

  15. 15

    Rogstad, D. H., and Ekers, R. D., Astrophys. J., 157, 481 (1969).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

CONKLIN, E. Physical Sciences: Search for Millimetre-wave Emission from Blue Stellar Objects. Nature 227, 1119–1120 (1970).

Download citation


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.