Author(s): Benito, Maria [UNESP] ; Cuoco, Alessandro ; Iocco, Fabio [UNESP]
Date: 2019
Persistent ID: http://hdl.handle.net/11449/189069
Origin: Oasisbr
Subject(s): dark matter experiments, rotation curves of galaxies, galaxy dynamics; dark matter experiments, rotation curves of galaxies, galaxy dynamics; dark matter experiments, rotation curves of galaxies, galaxy dynamics
Made available in DSpace on 2019-10-06T16:28:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-03-21
In this work we characterize the distribution of Dark Matter (DM) in the Milky Way (MW), and its uncertainties, adopting the well known Rotation Curve method. We perform a full marginalization over the uncertainties of the Galactic Parameters and over the lack of knowledge on the morphology of the baryonic components of the Galaxy. The local DM density ρ 0 is constrained to the range 0.3- 0.8 GeV/cm 3 at the 2 σ level, and has a strong positive correlation to R 0 , the local distance from the Galactic Center. The not well-known value of R 0 is thus, at the moment, a major limitation in determining ρ 0 . Similarly, we find that the inner slope of the DM profile, γ, is very weakly constrained, showing no preference for a cored profile (γ0) or a cuspy one (γ[1.0,1.4]). Some combination of parameters can be, however, strongly constrained. For example the often used standard ρ 0 =0.3 GeV/cm 3 , R 0 =8.5 kpc is excluded at more than 4 σ. We release the full likelihood of our analysis in a tabular form over a multidimensional grid in the parameters characterizing the DM distribution, namely the scale radius R s , the scale density ρ s , the inner slope of the profile γ, and R 0 . The likelihood can be used to include the effect of the DM distribution uncertainty on the results of searches for an indirect DM signal in gamma-rays or neutrinos, from the Galactic Center (GC), or the Halo region surrounding it. As one example, we study the case of the GC excess in gamma rays. Further applications of our tabulated uncertainties in the DM distribution involve local DM searches, like direct detection and anti-matter observations, or global fits combining local and GC searches.
ICTP - South American Institute for Fundamental Research and Instituto de Fisica Teorica Universidade Estadual Paulista (UNESP), Rua Dr. Bento Teobaldo Ferraz 271
Institute for Theoretical Particle Physics and Cosmology RWTH Aachen University
Univ. Grenoble Alpes USMB CNRS LAPTh
ICTP - South American Institute for Fundamental Research and Instituto de Fisica Teorica Universidade Estadual Paulista (UNESP), Rua Dr. Bento Teobaldo Ferraz 271
