Possibility of detecting anisotropic expansion of the universe by very accurate astrometry measurements
Refined astrometry measurements allow us to detect large-scale deviations from isotropy through real-time observations of changes in the angular separation between sources at cosmic distances. This “cosmic parallax” effect is a powerful consistency test of the Friedmann-Robertson-Walker metric and m...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 April 2009
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| In: |
Physical review letters
Year: 2009, Volume: 102, Issue: 15 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.102.151302 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.102.151302
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| Author Notes: | Claudia Quercellini, Miguel Quartin and Luca Amendola |
| Summary: | Refined astrometry measurements allow us to detect large-scale deviations from isotropy through real-time observations of changes in the angular separation between sources at cosmic distances. This “cosmic parallax” effect is a powerful consistency test of the Friedmann-Robertson-Walker metric and may set independent constraints on cosmic anisotropy. We apply this novel general test to Lemaitre-Tolman-Bondi cosmologies with off-center observers and show that future satellite missions such as Gaia might achieve accuracies that would put limits on the off-center distance which are competitive with cosmic microwave background dipole constraints. |
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| Item Description: | Gesehen am 13.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.102.151302 |