Zobrazeno 1 - 10
of 4 800
pro vyhledávání: '"A. Kumar Suresh"'
Autor:
Sabogal, Miguel A., Silva, Emanuelly, Nunes, Rafael C., Kumar, Suresh, Di Valentino, Eleonora, Giarè, William
In recent years, Cosmic Microwave Background (CMB) observations, Weak Lensing surveys, and $f(z)\sigma_8(z)$ measurements from Redshift-Space Distortions (RSD) have revealed a significant ($\sim$3$-$5$\sigma$) discrepancy in the inferred value of the
Externí odkaz:
http://arxiv.org/abs/2408.12403
We investigate a two-parameter extension of the $\Lambda_{\rm s}$CDM model by allowing variations in the effective number of neutrino species $N_{\rm eff}$ and their total mass $\sum m_\nu$. Our motivation is twofold: (i) to examine whether $\Lambda_
Externí odkaz:
http://arxiv.org/abs/2406.18496
Autor:
Akarsu, Ozgur, De Felice, Antonio, Di Valentino, Eleonora, Kumar, Suresh, Nunes, Rafael C., Ozulker, Emre, Vazquez, J. Alberto, Yadav, Anita
The idea of a rapid sign-switching cosmological constant (mirror AdS-dS transition) in the late universe at $z\sim1.7$, known as the $\Lambda_{\rm s}$CDM model, has significantly improved the fit to observational data and provides a promising scenari
Externí odkaz:
http://arxiv.org/abs/2406.07526
Autor:
Akarsu, Ozgur, De Felice, Antonio, Di Valentino, Eleonora, Kumar, Suresh, Nunes, Rafael C., Ozulker, Emre, Vazquez, J. Alberto, Yadav, Anita
We have successfully integrated $\Lambda_{\rm s}$CDM, a promising model for alleviating cosmological tensions, into a theoretical framework by endowing it with a specific Lagrangian from the VCDM model, a type-II minimally modified gravity. In this t
Externí odkaz:
http://arxiv.org/abs/2402.07716
Publikováno v:
ApJL, 2024, 964, L4
We systematically explore the influence of the prior of the peak absolute magnitude ($M$) of type Ia supernovae (SNe Ia) on the measurement of the Hubble constant ($H_0$) from SNe Ia observations. We consider five different data-motivated $M$ priors,
Externí odkaz:
http://arxiv.org/abs/2401.13187
Publikováno v:
JCAP04(2024)013
In this work, we derive for the first time observational constraints on the extended Minimal Theory of Massive Gravity (eMTMG) framework in light of Planck-CMB data, geometrical measurements from Baryon Acoustic Oscillation (BAO), Type Ia supernovae
Externí odkaz:
http://arxiv.org/abs/2311.10530
Autor:
Kumar, Suresh, Guruparan, Dhanyashri, Aaron, Pavithren, Telajan, Philemon, Mahadevan, Kavinesh, Davagandhi, Dinesh, Yue, Ong Xin
Deep learning has become a powerful tool in computational biology, revolutionising the analysis and interpretation of biological data over time. In our article review, we delve into various aspects of deep learning in computational biology. Specifica
Externí odkaz:
http://arxiv.org/abs/2310.03086
Autor:
Akarsu, Ozgur, Di Valentino, Eleonora, Kumar, Suresh, Nunes, Rafael C., Vazquez, J. Alberto, Yadav, Anita
We present a comprehensive analysis of the $\Lambda_{\rm s}$CDM model, which explores the recent conjecture suggesting a rapid transition of the Universe from anti-de Sitter vacua to de Sitter vacua (viz., the cosmological constant switches sign from
Externí odkaz:
http://arxiv.org/abs/2307.10899
Publikováno v:
Phys. Dark Univ. 42, 101281 (2023)
Modification of general relativity (GR) inspired by theories like $f(R)$ gravity is among the most popular ones to explain the late-time acceleration of the Universe as an alternative to the $\Lambda$CDM model. In this work, we use the state-of-the-a
Externí odkaz:
http://arxiv.org/abs/2301.07897
Publikováno v:
Phys. Rev. D 107, 103531 (2023)
We explore observational constraints on a cosmological model with an interaction between dark energy (DE) and dark matter (DM), using a compilation of 15 measurements of the 2D BAO (i.e., transversal) scale in combination with Planck-CMB data, to exp
Externí odkaz:
http://arxiv.org/abs/2301.06097