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

被引：0
|
作者：
Lacroix, Thomas [1 ]
机构：
[1] Laboratoire Univers and Particules de Montpellier (LUPM), CNRS and Université de Montpellier (UMR-5299), Place Eugène Bataillon, Montpellier Cedex 05,34095, France
来源：
Astronomy and Astrophysics | 2018年 / 619卷
基金：
欧盟地平线“2020”;
关键词：
Gravitation - Dark Matter - Stars - Black holes;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this work I use astrometric and spectroscopic data on the S2 star at the Galactic centre (GC) up to 2016 to derive specific constraints on the size of a dark matter (DM) spike around the central supermassive black hole Sgr A∗. These 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 tens of parsecs for cuspy outer halos and a few hundred parsecs for cored outer halos. © ESO 2018.
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