Z. C. Santana

activity

20232026

most citedNon-Parametric Analysis for the Dark Matter Density Evolution

4 citations · 6 across the 3 of their papers we have counts for

collaborators

3 papers

math.MG2026

On the center of distances of finite ultrametric spaces

Oleksiy Dovgoshey, Olga Rovenska

The center of distances of a metric space $(X, d)$ is the set $C (X)$ of all $t \in R^{+}$ for which the equation $d (x, p) = t$ has a solution for each $p \in X$ . We prove the inequ…

astro-ph.CO2025★ 2 cited

A Joint Analysis of Strong Lensing and Type Ia Supernovae to Determine the Hubble Constant

L. R. Colaço, R. F. L. Holanda, Z. C. Santana +1

We present a cosmological model-independent determination of the Hubble constant, $H_{0}$ , by combining time-delay measurements from seven TDCOSMO systems, Einstein radius measuremen…

astro-ph.CO2023★ 4 cited

Non-Parametric Analysis for the Dark Matter Density Evolution

Z. C. Santana, R. F. L. Holanda, R. Silva

In this paper, we investigate a potential departure in the standard dark matter density evolution law, $ρ_{d m} = ρ_{d m, 0} (1 + z)^{3}$ . The method involves considering a deformed evolut…