Astrophysique et technologie aérospatiale

Constraining Modified Gravity Models Using the Thermal Sunyaev- Zeldovich Effect

Abstract

Ivan De Martino*

Some modified gravity theories add, in their weak field limit, a Yukawa-correction to the Newtonian gravitational potential. Such a correction usually depends on the two parameters, one that accounts for the modification of the gravitational constant, and another one representing the scale length on which the scalar field propagates. The thermal Sunyaev-Zeldovich temperature anisotropies can be used to test the modified gravitational potential well demonstrating that the Yukawa-like gravitational potential is able describe the distribution of the hot Intra Cluster Medium without accounting for a Dark Matter halo.