4 papers
Prospective bounds on f(Q) gravity with pulsar timing arrays
Mohammadreza Davari, Alireza Allahyari
Pulsar timing arrays (PTAs) have recently provided compelling evidence for a stochastic gravitational wave background (SGWB) in the nanohertz frequency band, offering a unique wind…
Lorentz Violation with Gravitational Waves: Constraints from NANOGrav and IPTA Data
Alireza Allahyari, Mohammadreza Davari, David F. Mota
We explore a theoretical framework in which Lorentz symmetry is explicitly broken by incorporating derivative terms of the extrinsic curvature into the gravitational action. These…
Testing No slip model with pulsar timing arrays: NANOGrav and IPTA
Mohammadreza Davari, Alireza Allahyari, Shahram Khosravi
We perform an observational study of modified gravity considering a potential inflationary interpretation of pulsar timing arrays (PTA). We use a motivated model known as no slip i…
Gravitational wave probes of Barrow cosmology with LISA standard sirens
Mahnaz Asghari, Alireza Allahyari, David F. Mota
We study the Barrow cosmological model, which proposes that quantum gravity effects create a complex, fractal structure for the universe's apparent horizon. We leverage the thermod…