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In this work we improve the dynamic-evolutionary framework of two massive clusters at intermediate redshifts: Cl 0024+17 at $z \sim 0.4$ and MS 0451-03 at $z \sim 0.5$. The spectroscopic galaxy members were selected from Moran et al. (2007a), which c
Externí odkaz:
http://arxiv.org/abs/2410.19037
Autor:
Novais, Artur, Ribeiro, A. L. B.
Publikováno v:
Astrophysics, Volume 67, Number 3, 359-374 (2024)
Observational evidence consistently shows that the universe is spatially flat and undergoes Lorentzian time dilation as a function of redshift. In combination, such discoveries suggest that a Minkowskian description of cosmology might be technically
Externí odkaz:
http://arxiv.org/abs/2410.08240
Autor:
Ribeiro, André L. B., Lopes, Paulo A. A., Morell, Dailer F., Dantas, Christine C., Fonseca, Monyke H. S., Amarante, Beatriz G., Morais-Neto, Flávio R.
We study a sample of 936 early-type galaxies located in 48 low-z regular galaxy clusters with $M_{200}\geq 10^{14}~ M_\odot$ at $z< 0.1$. We examine variations in the Kormendy relation (KR) according to their location in the projected phase space (PP
Externí odkaz:
http://arxiv.org/abs/2402.10278
We present clear and direct evidence of the pre-processing effect of group galaxies falling into clusters in the local Universe ($z \lesssim 0.1$). We start with a sample of 238 clusters, from which we select 153 with N$_{200} \ge$ 20. We considered
Externí odkaz:
http://arxiv.org/abs/2309.11578
In this work, we consider four different galaxy populations and two distinct global environments in the local Universe (z $\leq 0.11$) to investigate the evolution of transitional galaxies (such as star-forming spheroids and passive discs) across dif
Externí odkaz:
http://arxiv.org/abs/2305.08788
Autor:
Ribeiro, A. L. B., Nascimento, R. S., Morell, D. F., Lopes, P. A. A., Dantas, C. C., Fonseca, M. H. S.
We study a sample of 936 early-type galaxies (ETGs) located in 48 low-z regular galaxy clusters with $M_{200}\geq 10^{14}~ M_\odot$ at $z< 0.1$. We examine variations in the concentration index, radius, and color gradient of ETGs as a function of the
Externí odkaz:
http://arxiv.org/abs/2302.04287
We have investigated the structure of the Hercules supercluster (SCL160) based on data originally extracted from the Sloan Digital Sky Survey SDSS-DR7. We have traced the mass distribution in the field through the numerical density-weighted by the $r
Externí odkaz:
http://arxiv.org/abs/2111.03053
Autor:
Sampaio, V. M., de Carvalho, R. R., Ferreras, I., Laganá, T. F., Ribeiro, A. L. B., Rembold, S. B.
By way of the projected phase-space (PPS), we investigate the relation between galaxy properties and cluster environment in a subsample of groups from the Yang Catalog. The sample is split according to the gaussianity of the velocity distribution in
Externí odkaz:
http://arxiv.org/abs/2103.03030
Autor:
Monteiro-Oliveira, R., Soja, A. C., Ribeiro, A. L. B., Bagchi, J., Sankhyayan, S., Candido, T. O., Flores, R. R.
In this work, we investigate the dynamical state of the galaxy cluster Abell 2631, a massive structure located at the core of the Saraswati supercluster. To do this, we first solve a tension found in the literature regarding the weak-lensing mass det
Externí odkaz:
http://arxiv.org/abs/2011.07996