Astronomy and astrophysics Gravitational lensing Concept
Einstein radius
Summary
The Einstein radius is the angular radius of the ring image that a gravitational lens forms when the source lies exactly behind it. It sets the angular scale of every lensing effect of that lens: image separations, the size of arcs and the duration of microlensing events. It depends on the mass of the lens and on the distances to the lens and to the source.
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About this page
| Tag | 4K4NMJCPD5 |
|---|---|
| URI | m2://4K4NMJCPD5 |
| Kind | concept |
| Writing | W0 stub |
| MSC | 85A04, 83C99 |
| Same as | |
| Changed | 3 November 2026 |
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