Supported by the National Natural Science Foundation of China under Grant No.19875016;the Doctorial Fund from the Education Ministry of China under Grant No.1999025110.
Scalar particles might be in the universe as diffuse gaseous clouds or compact objects and might be even present in D-stars.The astrophysical consequences are discussed in detail.Especially,D-stars may be considered a...
The motion of test particles around D-stars is investigated by Hamilton-Jacobi method. There may exist bound orbits under certain conditions. The trajector with periastrons at large r are Keplerian in form, except for...