Proceedings of the 2023 International Conference on Mathematical Physics and Computational Simulation
Series Vol. 11
, 17 November 2023
Access | Article
Density of dark matter in the Milky Way
* Author to whom correspondence should be addressed.
Theoretical and Natural Science, Vol. 11,
Published 17 November 2023. © 2023 The Author(s). Published by EWA
This article is an open access article distributed under the terms and
of the Creative Commons
Attribution (CC BY) license
, which permits
unrestricted use, distribution, and reproduction in any medium, provided the
original work is properly cited.
Citation Yiwen Lu. Density of dark matter in the Milky Way. TNS (2023) Vol. 11: 35-45. DOI: 10.54254/2753-8818/11/20230378.
Although several discoveries have proved the gravitational effects of dark matter (DM) on various astrophysical objects, its origin remains one of the main puzzles in physics. These observations can be explained by adding a new particle to the Standard Model that is weakly interacting, massive, stable, and non-baryonic. One of the main characteristics of DM in question, beyond its exact particle nature, is its density in the Universe. In this paper, we use the latest data for the local DM density, total DM mass, and rotation curves in the Milky Way to estimate the density profile of these elusive particles in our Galaxy. We find the density profile parameters that match the current data and analyze the density of the stellar bulge and gas and star in the disk. We show that the stellar bulge dominates the Galactic dynamic for distances below a few kiloparsecs (kpc), the disk plays the most important role at intermediate distances, and DM explains rotation data beyond a few tens of kpc. Finally, we settle on a local DM density of about 0.5-0.7 GeV/ to fit the data well, regardless of the exact function we use to model the density profile.
dark matter density, rotation curves, dark matter profiles.
1. Bertone G and Hooper D 2018 Rev. Mod. Phys. 90 045002.
2. Van Albada T S, Bahcall J N, Begeman K and Sancisi R 1985 Astrophys. J. 295 305.
3. Cirelli M, Gorcella G, Hektor A, Hutsi G, Kadastik M, Panci P, Raidal M, Sala F and Strumia A 2011 JCAP 03 051.
4. De Salas P, Malhan K, Freese K, Hattori K and Valluri M 2019 Journal of Cosmology and Astroparticle Physics 2019 037.
5. Sofue Y 2020 Galaxies 8 37.
6. Sofue Y 2016 Publications of the Astronomical Society of Japan 69 R1.
The datasets used and/or analyzed during the current study will be available
from the authors upon reasonable request.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0
Authors who publish this series agree to the following terms:
1. Authors retain copyright and grant the series right of first publication
with the work simultaneously licensed under a Creative Commons Attribution
License that allows others to share the work with an acknowledgment of the
work's authorship and initial publication in this series.
2. Authors are able to enter into separate, additional contractual
for the non-exclusive distribution of the series's published version of the
(e.g., post it to an institutional repository or publish it in a book), with
acknowledgment of its initial publication in this series.
3. Authors are permitted and encouraged to post their work online (e.g., in
institutional repositories or on their website) prior to and during the
process, as it can lead to productive exchanges, as well as earlier and
citation of published work (See Open Access Instruction).
- Volume Title
- Proceedings of the 2023 International Conference on Mathematical Physics and Computational Simulation
- ISBN (Print)
- ISBN (Online)
- Published Date
- 17 November 2023
- Theoretical and Natural Science
- ISSN (Print)
- ISSN (Online)
- © 2023 The Author(s)
- Open Access
- This article is an open access article distributed under the terms and
conditions of the Creative Commons Attribution (CC BY) license, which
permits unrestricted use, distribution, and reproduction in any medium,
provided the original work is properly cited