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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| 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 |
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doaj-f6d139d18ad24168a24a1ac63fe0ce522020-11-25T03:15:33ZengMDPI AGGalaxies2075-44342020-05-018424210.3390/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 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Yoshiaki Sofue |
| spellingShingle |
Yoshiaki Sofue Gravitational Focusing of Low-Velocity Dark Matter on the Earth’s Surface Galaxies dark matter Earth Milky Way gravitational focusing |
| author_facet |
Yoshiaki Sofue |
| author_sort |
Yoshiaki Sofue |
| title |
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_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_sort |
gravitational focusing of low-velocity dark matter on the earth’s surface |
| publisher |
MDPI AG |
| series |
Galaxies |
| issn |
2075-4434 |
| publishDate |
2020-05-01 |
| 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. |
| 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 |
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1724638767981002752 |