Bounds on graviton mass using weak lensing and SZ effect in galaxy clusters

Autor: Shobhit Mahajan, Deepak Jain, Amitabha Mukherjee, Akshay Rana
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Nuclear and High Energy Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
General relativity
FOS: Physical sciences
Astrophysics
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics::Cosmology and Extragalactic Astrophysics
Sunyaev–Zel'dovich effect
01 natural sciences
General Relativity and Quantum Cosmology
Gravitational potential
High Energy Physics::Theory
0103 physical sciences
010303 astronomy & astrophysics
Galaxy cluster
Weak gravitational lensing
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
010308 nuclear & particles physics
Graviton
Astrophysics - Astrophysics of Galaxies
lcsh:QC1-999
Massless particle
Massive gravity
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics - High Energy Astrophysical Phenomena
lcsh:Physics
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Physics Letters B, Vol 781, Iss, Pp 220-226 (2018)
Physics Letters
ISSN: 0370-2693
Popis: In General Relativity (GR), the graviton is massless. However, a common feature in several theoretical alternatives of GR is a non-zero mass for the graviton. These theories can be described as massive gravity theories. Despite many theoretical complexities in these theories, on phenomenological grounds, the implications of massive gravity have been widely used to put bounds on graviton mass. One of the generic implications of giving a mass to the graviton is that the gravitational potential will follow a Yukawa-like fall off. We use this feature of massive gravity theories to probe the mass of graviton by using the largest gravitationally bound objects, namely galaxy clusters. In this work, we use the mass estimates of galaxy clusters measured at various cosmologically defined radial distances measured via weak lensing (WL) and Sunyaev-Zel'dovich (SZ) effect. We also use the model independent values of Hubble parameter $H(z)$ smoothed by a non-parametric method, Gaussian process. Within $1\sigma$ confidence region, we obtain the mass of graviton $m_g < 5.9 \times 10^{-30}$ eV with the corresponding Compton length scale $\lambda_g > 6.82$ Mpc from weak lensing and $m_g < 8.31 \times 10^{-30}$ eV with $\lambda_g > 5.012$ Mpc from SZ effect. This analysis improves the upper bound on graviton mass obtained earlier from galaxy clusters.
Comment: 9 Pages, 3 Figures, 2 Tables, Accepted for publication in Physics Letters B
Databáze: OpenAIRE
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