Cosmological constraints on the Hu-Sawicki modified gravity scenario

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.123516· OSTI ID:21300947

Martinelli, Matteo; Melchiorri, Alessandro; Amendola, Luca ^[1]

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1. Dipartimento di Fisica and Sezione INFN, Universita' di Roma 'La Sapienza', Ple Aldo Moro 2, 00185 (Italy)

In this paper we place new constraints on a f(R) modified gravity model recently proposed by Hu and Sawicki (HS). After checking that the HS model produces a viable cosmology, i.e. a matter dominated epoch followed by a late-time acceleration, we constrain some of its parameters by using recent observations from the UNION compilation of luminosity distances of Supernovae type Ia, including complementary information from baryonic acoustic oscillations, Hubble expansion, and age data. We found that the data considered is unable to place significant constraints on the model parameters and we discuss the impact of a different assumption of the background model in cosmic parameters inference.

• OSTI ID: 21300947
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 12; Other Information: DOI: 10.1103/PhysRevD.79.123516; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
BARYONS
COSMOLOGY
EXPANSION
GRAVITATION
HUBBLE EFFECT
LUMINOSITY
MATTER
OSCILLATIONS
SIMULATION
SUPERNOVAE