7 papers
Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
Mehdi Rezaei, Supriya Pan, Weiqiang Yang +1
This study explores the possibility of a time-varying dark energy (DE) equation of state (EoS) deviating from -1. We employ a comprehensive dataset of usual astronomical probes (Ty…
Dark Energy Is Not That Into You: Variable Couplings after DESI DR2 BAO
Weiqiang Yang, Sibo Zhang, Olga Mena +2
In interacting dark energy (DE) and dark matter (DM) scenarios, the interaction function typically includes a coupling parameter that quantifies the strength of energy exchange…
When Dark Matter Heats Up: A Model-Independent Search for Non-Cold Behavior
Mazaharul Abedin, Luis A. Escamilla, Supriya Pan +2
This article questions the common assumption of cold dark matter (DM) by exploring the possibility of a non-zero equation of state (EoS) without relying on any parametric approach.…
In search of an interaction in the dark sector through Gaussian Process and ANN approaches
Mazaharul Abedin, Guo-Jian Wang, Yin-Zhe Ma +1
Whether the current observational data indicate any evidence of interaction between the dark sector is a matter of supreme interest at the present moment. This article searched for…
Probing the cold nature of dark matter
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino +3
A pressureless dark matter component fits well with several cosmological observations. However, there are indications that cold dark matter may encounter challenges in explaining o…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…