2k citations · 7.8k across the 94 of their papers we have counts for
94 papers
Do DESI-DR2 BAO data imply a coupling of dark matter and dark energy?
Weiqiang Yang, Sibo Zhang, Dinorah Barbosa +3
We revisit an interacting dark matter (DM) -- dark energy (DE) model characterized by the interaction function , where is a constant coupling parameter and is t…
Late-Time Emergence of Dark Energy and Its Interaction with Dark Matter
Sibo Zhang, Weiqiang Yang, Supriya Pan +3
We present an interacting scenario between dark energy (DE) and dark matter (DM), where DE has an emergent nature, that means, DE was absent in the early universe but it becomes ef…
Beyond dynamical dark energy: the role of dark sector interactions after DESI DR2
Weiqiang Yang, Sibo Zhang, Supriya Pan +2
Recent DESI DR2 observations have renewed interest in extensions of the CDM cosmological model, particularly through indications of a time-varying dark energy equation of state.…
When One-Parameter Dark Energy Makes Neutrinos Physical Again
Weiqiang Yang, Eleonora Di Valentino, Eric V. Linder +2
A puzzling implication of current data interpreted in the -Cold Dark Matter cosmology is the preference for a negative sum of neutrino masses. Moving to CDM brings an ap…
Plasma impact on black hole shadow and gravitational weak lensing for Schwarzschild-like black hole
Weiqiang Yang, Mirzabek Alloqulov, Ahmadjon Abdujabbarov +3
This article delves into the observational properties of a Schwarzschild-like black hole (BH). Initially, the research provides a succinct examination of the spacetime geometry and…
When Dark Energy Turns On: Constraints on a Critical Emergence Model
Mahdi Najafi, Mahdi Habibollahi, Masoume Reyhani +4
We investigate a specific emergent dark energy scenario, known as critically emergent dark energy (CEDE), in which dark energy is effectively absent in the early Universe and becom…
Cosmological analysis of a viable gravity model
Siqi He, Weiqiang Yang, Hangyi Jin
Since viable gravity models must reconcile early-universe inflation with late-time acceleration, we specifically study the dynamical behavior of such a theory during the mat…
Joint Constraints on Neutrinos and Dynamical Dark Energy in Minimally Modified Gravity
Artur Ladeira, Rafael C. Nunes, Supriya Pan +1
The \(w_{\dagger}\)VCDM framework provides a theoretically well-controlled extension of \(Λ\)CDM within the class of minimally modified gravity theories, allowing for flexible cosm…
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…
Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints
Wenzhong Liu, Yabo Wu, Supriya Pan +1
Astronomical observations suggest that the current standard -Cold Dark Matter model in modern cosmology has some discrepancies when fitting the data during the whole expansion h…
Shape of Dark Energy: Constraining Its Evolution with a General Parametrization
Dong Ha Lee, Weiqiang Yang, Eleonora Di Valentino +2
We consider a general dark energy (DE) model parametrized by its equation-of-state (EoS), featuring three free parameters: (the present-day value of the DE EoS), (quant…
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.…
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…
A New Window on Dynamical Dark Energy: Combining DESI-DR2 BAO with future Gravitational Wave Observations
Felipe Bruno Medeiros dos Santos, Jonathan Morais, Supriya Pan +2
Baryon acoustic oscillation (BAO) data from the Dark Energy Spectroscopic Instrument (DESI) appear to indicate the first evidence for dynamical dark energy (DDE), with a present-da…
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.…
Interacting dark energy after DESI DR2: a challenge for CDM paradigm?
Supriya Pan, Sivasish Paul, Emmanuel N. Saridakis +1
We investigate the scenario of interacting dark energy through a detailed confrontation with various observational datasets. We quantify the interaction in a general way, through t…
Testing an oscillatory behavior of dark energy
Luis A. Escamilla, Supriya Pan, Eleonora Di Valentino +3
The main aim of this work is to use a model-independent approach, along with late-time observational probes, to reconstruct the dark energy (DE) equation of state .…
On the interacting dark energy scenarios the case for Hubble constant tension
Supriya Pan, Weiqiang Yang
The Hubble constant is one of the important cosmological parameters measuring the expansion rate of our universe at present moment. Over the last couple of years, has c…
Evidence of dynamical dark energy in a non-flat universe: current and future observations
Mehdi Rezaei, Supriya Pan, Weiqiang Yang +1
We investigate the dark energy phenomenology in an extended parameter space where we allow the curvature density of our universe as a free-to-vary parameter. The inclusion of the c…
Exploring bulk viscous unified scenarios with Gravitational Waves Standard Sirens
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino +2
We consider the unified bulk viscous scenarios and constrain them using the Cosmic Microwave Background observations from Planck 2018 and the Pantheon sample from Type Ia Supernova…
IWDM: The fate of an interacting non-cold dark matter vacuum scenario
Supriya Pan, Weiqiang Yang, Eleonora Di Valentino +2
In most cosmological models, the equation of state of the dark matter is assumed to be zero, which means that the dark matter is pressure-less or cold. While this hypothesis is bas…
Revealing the effects of curvature on the cosmological models
Weiqiang Yang, William Giarè, Supriya Pan +3
In this paper we consider the effects of adding curvature in extended cosmologies involving a free-to-vary neutrino sector and different parametrizations of Dark Energy (DE). We ma…
Report of the Topical Group on Cosmic Probes of Fundamental Physics for for Snowmass 2021
Rana X. Adhikari, Luis A. Anchordoqui, Ke Fang +118
Cosmic Probes of Fundamental Physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) and gravitational waves. Already today, these probe…