Towards a New Proposal for the Time Delay in Gravitational Lensing
One application of the Cosmological Gravitational Lensing in General Relativity is the measurement of the Hubble constant H 0 using the time delay Δ t between multiple images of lensed quasars. This method has already been applied, obtaining a value of H 0 compatible with tha...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2017-09-01
|
| Series: | Symmetry |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-8994/9/10/202 |
| _version_ | 1797999448754749440 |
|---|---|
| author | Nicola Alchera Marco Bonici Nicola Maggiore |
| author_facet | Nicola Alchera Marco Bonici Nicola Maggiore |
| author_sort | Nicola Alchera |
| collection | DOAJ |
| description | One application of the Cosmological Gravitational Lensing in General Relativity is the measurement of the Hubble constant H 0 using the time delay Δ t between multiple images of lensed quasars. This method has already been applied, obtaining a value of H 0 compatible with that obtained from the SNe 1A, but non-compatible with that obtained studying the anisotropies of the CMB. This difference could be a statistical fluctuation or an indication of new physics beyond the Standard Model of Cosmology, so it desirable to improve the precision of the measurements. At the current technological capabilities it is possible to obtain H 0 to a percent level uncertainty, so a more accurate theoretical model could be necessary in order to increase the precision about the determination of H 0 . The actual formula which relates Δ t with H 0 is approximated; in this paper we expose a proposal to go beyond the previous analysis and, within the context of a new model, we obtain a more precise formula than that present in the literature. |
| first_indexed | 2024-04-11T11:04:47Z |
| format | Article |
| id | doaj.art-0c313eb33267438d9395adcba8e9c272 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-04-11T11:04:47Z |
| publishDate | 2017-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-0c313eb33267438d9395adcba8e9c2722022-12-22T04:28:24ZengMDPI AGSymmetry2073-89942017-09-0191020210.3390/sym9100202sym9100202Towards a New Proposal for the Time Delay in Gravitational LensingNicola Alchera0Marco Bonici1Nicola Maggiore2Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, ItalyDipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, ItalyDipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, ItalyOne application of the Cosmological Gravitational Lensing in General Relativity is the measurement of the Hubble constant H 0 using the time delay Δ t between multiple images of lensed quasars. This method has already been applied, obtaining a value of H 0 compatible with that obtained from the SNe 1A, but non-compatible with that obtained studying the anisotropies of the CMB. This difference could be a statistical fluctuation or an indication of new physics beyond the Standard Model of Cosmology, so it desirable to improve the precision of the measurements. At the current technological capabilities it is possible to obtain H 0 to a percent level uncertainty, so a more accurate theoretical model could be necessary in order to increase the precision about the determination of H 0 . The actual formula which relates Δ t with H 0 is approximated; in this paper we expose a proposal to go beyond the previous analysis and, within the context of a new model, we obtain a more precise formula than that present in the literature.https://www.mdpi.com/2073-8994/9/10/202classical general relativitygravitational lenses |
| spellingShingle | Nicola Alchera Marco Bonici Nicola Maggiore Towards a New Proposal for the Time Delay in Gravitational Lensing Symmetry classical general relativity gravitational lenses |
| title | Towards a New Proposal for the Time Delay in Gravitational Lensing |
| title_full | Towards a New Proposal for the Time Delay in Gravitational Lensing |
| title_fullStr | Towards a New Proposal for the Time Delay in Gravitational Lensing |
| title_full_unstemmed | Towards a New Proposal for the Time Delay in Gravitational Lensing |
| title_short | Towards a New Proposal for the Time Delay in Gravitational Lensing |
| title_sort | towards a new proposal for the time delay in gravitational lensing |
| topic | classical general relativity gravitational lenses |
| url | https://www.mdpi.com/2073-8994/9/10/202 |
| work_keys_str_mv | AT nicolaalchera towardsanewproposalforthetimedelayingravitationallensing AT marcobonici towardsanewproposalforthetimedelayingravitationallensing AT nicolamaggiore towardsanewproposalforthetimedelayingravitationallensing |