26-30 July 2010
Montpellier 2 University
Europe/Paris timezone

Superdense dark matter clumps

29 Jul 2010, 11:05
20m
Amphithéatre Dumontet (Montpellier 2 University)

Amphithéatre Dumontet

Montpellier 2 University

Place Eugene Bataillon, 34095 Montpellier Cedex 5 FRANCE
Talk Structure Formation & N-body simulations Parallel Session : Structure Formation & N-body simulations 2

Speaker

Prof. Vyacheslav Dokuchaev (Institute for Nuclear Research of the Russian Academy of Sciences)

Description

Amplification of dark matter annihilation signal due to the small-scale clumpiness of the Galactic halo provides the unique possibility of the indirect dark matter particle identification. We describe a cosmological scenario for formation of superdense dark matter clumps from superheavy particles. As an illustrative example it is considered the case of superheavy neutralino. The small-scale superdense clumps may form from a non-standard spiky spectrum of perturbations during the radiation dominated era. These clumps are not destroyed by tidal interactions and can be extremely dense. Superdense clumps can be observed by the gamma-radiation from dark matter annihilations and by the gravitational wave detectors, while the production of primordial black holes constrains this scenario.

Primary author

Prof. Vyacheslav Dokuchaev (Institute for Nuclear Research of the Russian Academy of Sciences)

Co-authors

Dr Maruis Solberg (Institutt for fysikk, NTNU Trondheim, Norway) Prof. Michael Kachelriess (Institutt for fysikk, NTNU Trondheim, Norway) Prof. Veniamin Berezinsky (Laboratori Nazionali del Gran Sasso INFN, Italy) Dr Yury Eroshenko (Institute for Nuclear Research of the Russian Academy of Sciences)

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