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9 papers · 1 filter
How Dark Sector Equations of State Govern Interaction Signatures
Peng-Ju Wu, Ming Zhang, Shang-Jie Jin
Using late-Universe observations, we demonstrate that freeing dark energy and dark matter equations of state (EoS) dramatically alters the inferred strength and direction of their…
Observational challenges to holographic and Ricci dark energy paradigms: Insights from ACT DR6 and DESI DR2
Peng-Ju Wu, Tian-Nuo Li, Guo-Hong Du +1
Recent studies suggest that dark energy may be dynamical rather than being a mere cosmological constant . In this work, we examine the viability of two physically well-motivated…
Exploring non-cold dark matter in a scenario of dynamical dark energy with DESI DR2 data
Tian-Nuo Li, Peng-Ju Wu, Guo-Hong Du +3
Recent observations of DESI hint that dark matter (DM) may not be cold but have a non-zero equation of state (EoS) parameter, and that dark energy (DE) may not be a cosmological co…
Cosmological preference for a positive neutrino mass at 2.7: A joint analysis of DESI DR2, DESY5, and DESY1 data
Guo-Hong Du, Tian-Nuo Li, Peng-Ju Wu +2
Neutrinos and dark energy (DE) have entered a new era of investigation, as the latest DESI baryon acoustic oscillation measurements tighten the constraints on the neutrino mass and…
Testing the cosmic distance duality relation with baryon acoustic oscillations and supernovae data
Tian-Nuo Li, Guo-Hong Du, Peng-Ju Wu +3
One of the most fundamental relationships in modern cosmology is the cosmic distance duality relation (CDDR), which describes the relationship between the angular diameter distance…
Cosmological search for sterile neutrinos after DESI 2024
Guo-Hong Du, Tian-Nuo Li, Peng-Ju Wu +4
The question of whether the massive sterile neutrinos exist remains a crucial unresolved issue in both particle physics and cosmology. We explore the cosmological constraints on th…