Dynamical constraints on a dark matter density spike at the Galactic Centre from stellar orbits

Abstract : In this work, we use current astrometric and spectroscopic data on the S2 star at the Galactic Centre to derive specific constraints on the size of a dark matter density spike around the central supermassive black hole Sgr A*. Our limits are the best direct constraints on a DM spike at the GC for non-annihilating dark matter and exclude a spike with radius greater than a few pc for cuspy outer halos and a few hundred pc for cored outer halos.
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https://hal.archives-ouvertes.fr/hal-01696137
Contributeur : Nicolas Clementin <>
Soumis le : mardi 30 janvier 2018 - 10:33:07
Dernière modification le : mercredi 31 janvier 2018 - 01:20:37

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  • HAL Id : hal-01696137, version 1
  • ARXIV : 1801.01308

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Thomas Lacroix. Dynamical constraints on a dark matter density spike at the Galactic Centre from stellar orbits. LUPM:18-001. 8 pages, 5 figures. 2018. 〈hal-01696137〉

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