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Automated Determination of Stellar Population Parameters in Galaxies Using Active Instance-based Learning
Thamar Solorio, Olac Fuentes, Roberto Terlevich +2
In this work we focus on the determination of the relative distributions of young, intermediate-age and old populations of stars in galaxies. Starting from a grid of theoretical po…
Age determination of the nuclear stellar population of Active Galactic Nuclei using Locally Weighted Regression
Trilce Estrada-Piedra, Juan Pablo Torres-Papaqui, Roberto Terlevich +2
We present a new technique to segregate old and young stellar populations in galactic spectra using machine learning methods. We used an ensemble of classifiers, each classifier in…
How old are the HII Galaxies?
Roberto Terlevich, Sergiy Silich, Daniel Rosa-Gonzalez +1
Using a novel approach we have reanalized the question of whether the extreme star forming galaxies known as HII galaxies are truly young or rejuvenated old systems. We first prese…
Lyman alpha emission in starbursts: implications for galaxies at high redshift
J. M. Mas-Hesse, D. Kunth, G. Tenorio-Tagle +3
We present the results of a high resolution UV 2-D spectroscopic survey of star forming galaxies observed with HST-STIS. Our main aim was to map the Lyman alpha profiles to learn a…