Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Galaxies |
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| Online Access: | https://www.mdpi.com/2075-4434/8/2/42 |
| _version_ | 1827716822177153024 |
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| author | Yoshiaki Sofue |
| author_facet | Yoshiaki Sofue |
| author_sort | Yoshiaki Sofue |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T19:48:11Z |
| format | Article |
| id | doaj.art-f6d139d18ad24168a24a1ac63fe0ce52 |
| institution | Directory Open Access Journal |
| issn | 2075-4434 |
| language | English |
| last_indexed | 2024-03-10T19:48:11Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Galaxies |
| spelling | doaj.art-f6d139d18ad24168a24a1ac63fe0ce522023-11-20T00:40:38ZengMDPI AGGalaxies2075-44342020-05-01824210.3390/galaxies8020042Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s SurfaceYoshiaki Sofue0Institute of Astronomy, The University of Tokyo, Mitaka, Tokyo 181-0015, JapanWe 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.https://www.mdpi.com/2075-4434/8/2/42dark matterEarthMilky Waygravitational focusing |
| spellingShingle | Yoshiaki Sofue Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface Galaxies dark matter Earth Milky Way gravitational focusing |
| title | Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface |
| title_full | Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface |
| title_fullStr | Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface |
| title_full_unstemmed | Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface |
| title_short | Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface |
| title_sort | gravitational focusing of low velocity dark matter on the earth s surface |
| topic | dark matter Earth Milky Way gravitational focusing |
| url | https://www.mdpi.com/2075-4434/8/2/42 |
| work_keys_str_mv | AT yoshiakisofue gravitationalfocusingoflowvelocitydarkmatterontheearthssurface |