6 papers
Observational and Thermodynamic aspects of one-dimensional Dark Energy EoS parametrization models
Anirban Chatterjee, Yungui Gong
We investigate the observational and thermodynamic viability of Gong-Zhang (GZ) Type~I (GZ1) and Type~II (GZ2) dark-energy parametrizations using late-time cosmological probes incl…
A comprehensive dynamical and phenomenological analysis of structure growth in curvature-modulated coupled quintessence scenario
Anirban Chatterjee, Yungui Gong
We investigate an interacting dark energy-dark matter model within the quintessence framework, characterized by the coupling term $Q_0 = ακÏ_m \dotÏ \left[1 - βR/(6H^2) \right…
Understanding curvature-matter interaction in viable dark energy models: A dynamical analysis approach
Anirban Chatterjee, Yungui Gong
We employ a linear stability analysis approach to explore the dynamics of matter and curvature-driven dark energy interactions within the framework of two types of viable gr…
Probing new fundamental fields with Extreme Mass Ratio Inspirals
Chao Zhang, Yungui Gong
We examine extreme mass ratio inspirals (EMRIs), where a charged compact object spirals into a supermassive black hole, in modified gravity theories with additional scalar or vecto…
Distinguishing dark matter halos with Extreme mass ratio inspirals
Yang Zhao, Ning Dai, Yungui Gong
Using the static, spherically symmetric metric for a black hole (BH) immersed in dark matter (DM) halo characterized by Hernquist, Burkert, and Navarro-Frenk-White (NFW) density di…
The constraint on modified black holes with extreme mass ratio inspirals
Chao Zhang, Guoyang Fu, Yungui Gong
The low-energy effective action of String Theory introduces corrections to the dilaton-graviton sector, resulting in deformed black holes beyond general relativity. We analyze extr…