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Rotation Curve of the Milky Way and the Dark Matter Density

Institute of Astronomy, Graduate School of Sciences, The University of Tokyo, Mitaka, Tokyo 181-0015, Japan
Galaxies 2020, 8(2), 37; https://doi.org/10.3390/galaxies8020037
Received: 12 February 2020 / Revised: 14 April 2020 / Accepted: 20 April 2020 / Published: 29 April 2020
We review the current status of the study of rotation curve (RC) of the Milky Way, and present a unified RC from the Galactic Center to the galacto-centric distance of about 100 kpc. The RC is used to directly calculate the distribution of the surface mass density (SMD). We then propose a method to derive the distribution of dark matter (DM) density in the in the Milky Way using the SMD distribution. The best-fit dark halo profile yielded a local DM density of ρ = 0.36 ± 0.02 GeV cm 3 . We also review the estimations of the local DM density in the last decade, and show that the value is converging to a value at ρ = 0.39 ± 0.09 GeV cm 3 . View Full-Text
Keywords: galaxies; DM—galaxies; individual (Milky Way)—galaxies; rotation curve galaxies; DM—galaxies; individual (Milky Way)—galaxies; rotation curve
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Sofue, Y. Rotation Curve of the Milky Way and the Dark Matter Density. Galaxies 2020, 8, 37.

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