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Open AccessArticle

Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface

Institute of Astronomy, The University of Tokyo, Mitaka, Tokyo 181-0015, Japan
Galaxies 2020, 8(2), 42; https://doi.org/10.3390/galaxies8020042
Received: 31 March 2020 / Revised: 7 May 2020 / Accepted: 13 May 2020 / Published: 16 May 2020
We show that the Earth acts as a high-efficiency gravitational collector of low-velocity flow of dark matter (DM). The focal point appears on the Earth’s surface, when the DM flow speed is about 17 km/s with respect to the geo-center. We discuss diurnal modulation of the local DM density influenced by the Earth’s gravity. We also touch upon similar effects on galactic and solar system objects. View Full-Text
Keywords: dark matter; Earth; Milky Way; gravitational focusing dark matter; Earth; Milky Way; gravitational focusing
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Sofue, Y. Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface. Galaxies 2020, 8, 42.

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