From the 1 of 5 linked papers with an AI index.
5 papers
Minimally modified gravity with Laplacian auxiliary constraints and an inflationary realization
Jakkrit Sangtawee, Antonio De Felice, Khamphee Karwan
The paper proposes a minimally modified gravity theory that retains only two tensorial gravitational degrees of freedom by introducing Laplacian‑coupled auxiliary constraints, and…
Spherical collapse and cluster number counts in DHOST theories that pass the constraints from gravitational waves
Sakdithut Jitpienka, Khamphee Karwan, David F. Mota
We investigate the spherical collapse model and the abundance of galaxy clusters in a class of degenerate higher-order scalar--tensor (DHOST) theories in which gravitational waves…
Cluster number counts in dark energy model with energy and momentum coupling to dark matter
Chattree Wongsangwal, Khamphee Karwan, Stharporn Sapa +1
The influences on the cluster number counts from the coupling between dark energy and dark matter with momentum transfer are investigated. We find that the extrapolated linear dens…
A Unified Dynamical Systems Framework for Cosmology in Gravity: Generic Features Beyond the Coincident Gauge
Jibitesh Dutta, Wompherdeiki Khyllep, Saikat Chakraborty +2
We present a unified dynamical systems framework for spatially flat FLRW cosmology in gravity, covering all three connection branches via a single set of Hubble-normalised v…
Reproducing CDM-like Solutions in Gravity: A Comprehensive Study Across All Connection Branches
Saikat Chakraborty, Jibitesh Dutta, Daniele Gregoris +2
Given the remarkable success of the CDM model in fitting various cosmological observations, a pertinent question in assessing the phenomenological viability of modified gravity…