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The velocity distribution of the dark matter particles on the outskirts ofthe Solar System remains unclear. We suggest to determine it usingexperimentally found properties of the oldest halo objects. Indeed, the oldesthalo stars and globular clusters form a collisionless system, as well as darkmatter particles do, and they evolved in the same gravitational field. If weaccept this analogy, we can show that the velocity distribution of the darkmatter particles should be highly anisotropic and have a sharp maximum near$\upsilon\sim 500$ {km/s}. The distribution is totally different from theMaxwell one.  We analyze the influence of the distribution function on the results of darkmatter detection experiments. It is found that the direct detection signalshould differ noticeably from the one calculated from the Maxwell distributionwith $<\upsilon>\simeq 220$ {km/s}, which is conventional for direct detectionexperiments (the ratio depends on the detector properties and typically fallswithin the range between 6 and 0.2). Moreover, the sharp distinction from theMaxwell distribution can be very essential to the observations of dark matterannihilation.

Principal properties of the velocity distribution of dark matter particles on the outskirts of the Solar System