Capture of Dark Matter Particles by a Galaxy in the Case of a Bimodal Distribution of Their Velocities

oleh: Serge Parnovsky, Ruth Durrer, Aleksei Parnowski

Format: Article
Diterbitkan: Andromeda Publishing and Academic Services 2023-02-01

Deskripsi

We have analyzed the rate of capture of dark matter (DM) particles by the galaxy in the case of the existence of two different types of DM or a bimodal velocity distribution function for DM. It is shown that, in addition to the scenario considered in our previous work which is based on the assumption of a unimodal distribution, more complex scenarios are possible in which the transition to the state of intense capture and/or exit from it can occur in two stages. A detailed description is given of the change in the curve describing the rate of capture of dark matter particles as a function of the rate of increase in the baryon mass of the galaxy for various values of the rate of decrease of the DM density