On Birkhoff's theorem for electromagnetic fields in a scalartensor theory of gravitation
Abstract
It is shown that Birkhoff's theorem of general relativity is true for electromagnetic fields in the scalartensor theory of gravitation formulated by Sen and Dunn (1971) when the scalar field introduced in the theory is independent of time. This may possibly be due to the fact that the interaction of the timedependent scalar field with the electromagnetic field stimulates electromagnetic monopole radiation.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 February 1977
 DOI:
 10.1088/03054470/10/2/007
 Bibcode:
 1977JPhA...10..185R
 Keywords:

 Electromagnetic Fields;
 Field Theory (Physics);
 Gravitation Theory;
 Relativity;
 Maxwell Equation;
 Monopoles;
 Scalars;
 Tensors;
 Time Dependence;
 Physics (General)