July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Boosting the boost: the effect of tidal stripping on the subhalo luminosity

Jul 30, 2015, 3:30 PM
1h
Amazon Foyer Terrace (World Forum)

Amazon Foyer Terrace

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 258
Poster contribution DM-TH Poster 1 DM and NU

Speaker

Richard Bartels (University of Amsterdam)

Description

In the paradigm of ΛCDM, structures form hierarchically, implying that large structures contain smaller substructures. These so-called subhalos can enhance the dark matter annihilation signal that one expects to see from a given host halo, the effect of which is called the boost factor. In the literature this boost factor is typically calculated assuming a density profile for the substructure, or analogously a concentration-mass relation, corresponding to that of field halos. However, since subhalos accreted in a gravitational potential of their host loose mass through tidal stripping and dynamical friction, they have a quite characteristic density profile, different from that of the field halos of the same mass. In this work we attempt to quantify the effect of tidal stripping on the boost factor. We find that the boost factor increases by a factor few for host halos ranging from sub-galaxy to cluster masses.
Registration number following "ICRC2015-I/" 921
Collaboration -- not specified --

Primary author

Richard Bartels (University of Amsterdam)

Co-author

Christoph Weniger (University of Amsterdam)

Presentation materials

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