The Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT) have recently provided new and precise measurements of the cosmic microwave background anisotropy damping tail. This region of the cosmic microwave background angular spectra, thanks to the angular distortions produced by gravitational lensing, can probe the growth of matter perturbations and provide a new test for general relativity. Here we make use of the ACT and SPT power spectrum measurements (combined with the recent WMAP9 data) to constrain f(R) gravity theories. Adopting a parametrized approach, we obtain an upper limit on the length scale of the theory of B-0 < 0.86 at 95% C.L. from ACT, while we get a much stronger limit from SPT with B-0 < 0.14 at 95% C.L.

Constraints on modified gravity from the Atacama Cosmology Telescope and the South Pole Telescope

Pagano, Luca
2013

Abstract

The Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT) have recently provided new and precise measurements of the cosmic microwave background anisotropy damping tail. This region of the cosmic microwave background angular spectra, thanks to the angular distortions produced by gravitational lensing, can probe the growth of matter perturbations and provide a new test for general relativity. Here we make use of the ACT and SPT power spectrum measurements (combined with the recent WMAP9 data) to constrain f(R) gravity theories. Adopting a parametrized approach, we obtain an upper limit on the length scale of the theory of B-0 < 0.86 at 95% C.L. from ACT, while we get a much stronger limit from SPT with B-0 < 0.14 at 95% C.L.
2013
Marchini, Andrea; Melchiorri, Alessandro; Salvatelli, Valentina; Pagano, Luca
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2397479
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 15
social impact