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Lensing cosmic drift.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Jul2022, Vol. 513 Issue 4, p5198-5203. 6p. - Publication Year :
- 2022
-
Abstract
- As the Universe expands, the redshift of distant sources changes with time. Here, we discuss gravitational lensing phenomena that are consequence of the redshift drift between lensed source, gravitational lens, and observer. When the source is located very close to the drifting caustics, a pair of images could occur (or disappear) because of the cosmological expansion. Furthermore, lensing systems act as signal converters of the redshift drift. The angular position, magnification, distortion, and time delay of already existing multiple images change. We estimate the expected frequency of these phenomena and the prospects to observe them in the era of deep and large surveys. The drift detection in image separation could be within reach of next-generation surveys with μarcsec angular resolution. [ABSTRACT FROM AUTHOR]
- Subjects :
- *EXPANDING universe
*GRAVITATIONAL lenses
*REDSHIFT
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 513
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 157263464
- Full Text :
- https://doi.org/10.1093/mnras/stac1261