Parametrized modified gravity and the CMB bispectrum
We forecast the constraints on modified theories of gravity from the cosmic microwave background (CMB) anisotropies bispectrum that arises from correlations between lensing and the Integrated Sachs-Wolfe effect. In models of modified gravity the evolution of the metric potentials is generally altere...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2013
|
| Online Access: | http://hdl.handle.net/1721.1/76206 |
| _version_ | 1826193722312753152 |
|---|---|
| author | Silvestri, Alessandra Valentino, Eleonora Di Salvatelli, Valentina Melchiorri, Alessandro |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Silvestri, Alessandra Valentino, Eleonora Di Salvatelli, Valentina Melchiorri, Alessandro |
| author_sort | Silvestri, Alessandra |
| collection | MIT |
| description | We forecast the constraints on modified theories of gravity from the cosmic microwave background (CMB) anisotropies bispectrum that arises from correlations between lensing and the Integrated Sachs-Wolfe effect. In models of modified gravity the evolution of the metric potentials is generally altered and the contribution to the CMB bispectrum signal can differ significantly from the one expected in the standard cosmological model. We adopt a parametrized approach and focus on three different classes of models: Linder’s growth index, Chameleon-type models, and f(R) theories. We show that the constraints on the parameters of the models will significantly improve with future CMB bispectrum measurements. |
| first_indexed | 2024-09-23T09:43:53Z |
| format | Article |
| id | mit-1721.1/76206 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:43:53Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/762062022-09-30T16:28:55Z Parametrized modified gravity and the CMB bispectrum Silvestri, Alessandra Valentino, Eleonora Di Salvatelli, Valentina Melchiorri, Alessandro Massachusetts Institute of Technology. Department of Physics Silvestri, Alessandra We forecast the constraints on modified theories of gravity from the cosmic microwave background (CMB) anisotropies bispectrum that arises from correlations between lensing and the Integrated Sachs-Wolfe effect. In models of modified gravity the evolution of the metric potentials is generally altered and the contribution to the CMB bispectrum signal can differ significantly from the one expected in the standard cosmological model. We adopt a parametrized approach and focus on three different classes of models: Linder’s growth index, Chameleon-type models, and f(R) theories. We show that the constraints on the parameters of the models will significantly improve with future CMB bispectrum measurements. National Science Foundation (U.S.) (Grant AST-0708501) 2013-01-08T18:23:47Z 2013-01-08T18:23:47Z 2012-09 2012-04 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1089-4918 http://hdl.handle.net/1721.1/76206 Di Valentino, Eleonora et al. “Parametrized Modified Gravity and the CMB Bispectrum.” Physical Review D 86.6 (2012). © 2012 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevD.86.063517 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Silvestri, Alessandra Valentino, Eleonora Di Salvatelli, Valentina Melchiorri, Alessandro Parametrized modified gravity and the CMB bispectrum |
| title | Parametrized modified gravity and the CMB bispectrum |
| title_full | Parametrized modified gravity and the CMB bispectrum |
| title_fullStr | Parametrized modified gravity and the CMB bispectrum |
| title_full_unstemmed | Parametrized modified gravity and the CMB bispectrum |
| title_short | Parametrized modified gravity and the CMB bispectrum |
| title_sort | parametrized modified gravity and the cmb bispectrum |
| url | http://hdl.handle.net/1721.1/76206 |
| work_keys_str_mv | AT silvestrialessandra parametrizedmodifiedgravityandthecmbbispectrum AT valentinoeleonoradi parametrizedmodifiedgravityandthecmbbispectrum AT salvatellivalentina parametrizedmodifiedgravityandthecmbbispectrum AT melchiorrialessandro parametrizedmodifiedgravityandthecmbbispectrum |