
TY  - JOUR
A1  - Le Marne, AE 
T1  - Observations of 23 Planetary Nebulae at 408 MHz
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1969
VL  - 22
IS  - 4
SP  - 545
EP  - 548
KW  - 
UR  - https://doi.org/10.1071/PH690545 
N2  - Various observers (e.g. Slee and Orchiston 1965; Davies et al. 1967; Hughes 1967; Thompson and Colvin 1967; Thompson, Colvin, and Stanley 1967; Kaftan-Kassim 1968) have so far detected nearly 100 planetary nebulae a.t high radiofrequencies (~3 GHz). In this range, the nebulae have been shown to be optically thin, their spectra being almost flat. Wherever possible, the radio flux densities have been compared with hydrogen recombination line observations. 
ER  -

