Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Bengaly, Carlos A. P."'
Autor:
Shao, Xiaoyun, Bengaly, Carlos A. P., Gonçalves, Rodrigo S., Carvalho, Gabriela C., Alcaniz, Jailson
In this paper, we obtain new measurements of the angular homogeneity scale ($\theta_H$) from the BOSS DR12 and eBOSS DR16 catalogs of Luminous Red Galaxies of the Sloan Digital Sky Survey. Considering the flat $\Lambda$CDM model, we use the $\theta_H
Externí odkaz:
http://arxiv.org/abs/2409.06009
We measure the speed of light with current observations, such as Type Ia Supernova, galaxy ages, radial BAO mode, as well as simulations of forthcoming redshift surveys and gravitational waves as standard sirens. By means of a Gaussian Process recons
Externí odkaz:
http://arxiv.org/abs/2409.05838
Autor:
Ghosh, Basundhara, Bengaly, Carlos
In this work, we investigate whether the baryon acoustic oscillation (BAO) measurements from redshift surveys, like the Sloan Digital Sky Survey (SDSS), and the Dark Energy Spectroscopic Instrument (DESI), are consistent with each other. We do so by
Externí odkaz:
http://arxiv.org/abs/2408.04432
Publikováno v:
Phys.Rev.D 109 (2024) 12, 123533
We use a recent Pantheon+SH0ES compilation of Type Ia Supernova distance measurements at low-redshift, i.e., $0.01 \leq z \leq 0.10$, in order to investigate the directional dependency of the deceleration parameter ($q_0$) in different patches ($60^{
Externí odkaz:
http://arxiv.org/abs/2402.17741
Autor:
Shao, Xiaoyun, Gonçalves, Rodrigo S., Bengaly, Carlos A. P., Andrade, Uendert, Carvalho, Gabriela C., Alcaniz, Jailson
In standard cosmology, the cosmic homogeneity scale is the transition scale above which the patterns arising from non-uniformities -- such as groups and clusters of galaxies, voids, and filaments -- become indistinguishable from a random distribution
Externí odkaz:
http://arxiv.org/abs/2309.07263
Publikováno v:
Phys. Dark Univ. 43, 101380 (2024)
We revisit a consistency test for the speed of light variability, using the latest cosmological observations. This exercise can serve as a new diagnostics for the standard cosmological model and distinguish between the minimal varying speed of light
Externí odkaz:
http://arxiv.org/abs/2302.00867
Publikováno v:
The European Physical Journal C volume 83, Article number: 548 (2023)
Local measurements of the Hubble constant ($H_0$) based on Cepheids e Type Ia supernova differ by $\approx 5 \sigma$ from the estimated value of $H_0$ from Planck CMB observations under $\Lambda$CDM assumptions. In order to better understand this $H_
Externí odkaz:
http://arxiv.org/abs/2209.09017
Autor:
Andrade, Uendert, Gonçalves, Rodrigo S., Carvalho, Gabriela C., Bengaly, Carlos A. P., Carvalho, Joel C., Alcaniz, Jailson
We report measurements of the angular scale of cosmic homogeneity ($\theta_{H}$) using the recently released luminous red galaxy sample of the sixteenth data release of the Sloan Digital Sky Survey (SDSS-IV LRG DR16). It consists of a model-independe
Externí odkaz:
http://arxiv.org/abs/2205.07819
Autor:
Rodrigues, Gabriel, Bengaly, Carlos
A powerful test of fundamental physics consists on probing the variability of fundamental constants in Nature. Although they have been measured on Earth laboratories and in our Solar neighbourhood with extremely high precision, it is crucial to carry
Externí odkaz:
http://arxiv.org/abs/2112.01963
Autor:
Bengaly, Carlos
The assumption of a Friedmann-Lema\^itre-Roberton-Walker (FLRW) Universe is one of the fundamental pillars of modern Cosmology. It is crucial to confront it against cosmological observations in order to confirm (or rule out) the validity of the $\Lam
Externí odkaz:
http://arxiv.org/abs/2111.06869