Abstract
It was shown in the frameworks of massive gravitational theories having in linear approximation mass term $${m^2}\left( {{\varphi ^{\alpha \beta }}{\varphi _{\alpha \beta }} - \frac{1}{2}{\varphi ^2}} \right)$$ in the lagrangian, that created some time ago spherically-symmetric static sources should possess inside their light cone not only Yukawa potential, but also nonstationary component. It leads to the long (~ 1/m) period of gravitational evaporation of such sources with the mass loss Ṁ ~ m2M2 The magnitude of the flux is c4/v4 times (с—speed of light, v—velocity of the source particles) bigger then negative gravitational radiation flux corresponding to the ghost scalar mode in the spectrum of such gravitational field, with stabilizing the source.
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