On the possible dark-matter content of QSO's and of compact, very massive entities in the nuclei of galaxies: a metastable particle with mass of about 10^10 GeV

We examine some general astrophysical results which can be related to the hypothesis that very heavy, metastable particles constitute compact, very massive central entities in QSO’s and the core of galaxies. The mass and lifetime have been calculated in detail previously: the mass is about ${10}^{10}\text{GeV}$; the lifetime is $\text{simgt}{10}^{21}\sec$. The specific decay gives rise to a new source of very large amounts of energy in radiation. The essence of the ideas discussed in this paper is that very massive, metastable dark matter constitutes entities near to black-hole conditions, and that it is decay which provides a large primary energy source from such entities, as components of QSO’s, AGN, and possibly GRB’s.