6 papers
A Sequentially-Valid Reanalysis of DESI's Dynamical Dark Energy Signal
Jinyoung Kim, David F. Mota, Andrius Tamosiunas
Surveys such as DESI release data in stages, and each release invites a fresh assessment of whether dark energy is consistent with a cosmological constant. Standard Wilks-based …
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…
Did DESI DR2 truly reveal dynamical dark energy?
Deng Wang, David Mota
A fundamental question in cosmology is whether dark energy evolves over time, a topic that has gained prominence since the discovery of cosmic acceleration. Recently, the DESI coll…
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.…
Constraints on Bianchi-I type universe with SH0ES anchored Pantheon+ SNIa data
Anshul Verma, Sanjeet K. Patel, Pavan K. Aluri +2
We study the Bianchi-I cosmological model motivated by signals of statistical isotropy violation seen in cosmic microwave background (CMB) observations and others. To that end, we…
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…