Bi, XJ (reprint author), Chinese Acad Sci, IHEP, Key Lab Particle Astrophys, Beijing 100049, Peoples R China.
In this paper I study the detectability of gamma rays from dark matter annihilation in the subhalos of the Milky Way by the satellite-based experiments EGRET and GLAST. I work in the frame of supersymmetric extension of the standard model and assume the lightest neutralino being the dark matter particles. Based on the N-body simulation of the evolution of dark matter subhalos I first calculate the average intensity distribution of this new class of gamma-ray sources by neutralino annihilation. It is possible to detect these gamma-ray sources by EGRET and GLAST. Conversely, if these sources are not detected the nature of the dark matter particles will be constrained by these experiments, depending, however, on the uncertainties of the subhalo profile.