
TY  - JOUR
A1  - Wade, CM 
T1  - On the Radio Emission of Hydrogen Nebulae
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1958
VL  - 11
IS  - 3
SP  - 388
EP  - 399
KW  - 
UR  - https://doi.org/10.1071/PH580388 
N2  - The interpretation of radio-frequency observations of H II regions is discussed with particular regard for the possible effects of random variations in the electron density and electron temperature through the nebulae. It is shown that such variations serve to alter the optical depth and that the conventional definition of the "emission measure" requires modification if it is to be considered an observable quantity. The radio emission of Strömgren spheres is discussed, and a means of determining their electron temperatures is described. An empirical method for the determination of Strömgren's constant defining the ionized volume as a function of the spectral type and luminosity of the exciting star is described. 
ER  -

