The evolution of Balmer jump selected galaxies in the ALHAMBRA survey
P. Troncoso Iribarren, L. Infante, N. Padilla, I. Lacerna, S. Garcia,, A. Orsi, A. Mu\~noz Arancibia, J. Moustakas, J. Crist\'obal-Hornillos, M., Moles, A. Fern\'andez-Soto, V. J. Mart\'inez, M. Cervi\~no, E.J. Alfaro, B., Ascaso, P. Arnalte-Mur, L. Nieves-Seoane, N. Ben\'itez

TL;DR
This study introduces a new color-selection technique to identify star-forming galaxies across 0.5<z<1.5, analyzing their evolution, halo masses, and star formation rates, linking high-redshift progenitors to local elliptical galaxies.
Contribution
It presents a novel Balmer jump-based selection method and traces galaxy evolution and halo growth from high redshift to the present.
Findings
BJGs reside in haloes of ~10^{12.5} M_sun, increasing slightly toward lower redshift.
Galaxy stellar mass remains nearly constant from z~1 to z~0.5, indicating minor merger influence.
Star formation and minor mergers are primary in galaxy mass assembly over this period.
Abstract
We present a new color-selection technique, based on the Bruzual & Charlot models convolved with the bands of the ALHAMBRA survey, and the redshifted position of the Balmer jump to select star-forming galaxies in the redshift range 0.5 < z < 1.5. These galaxies are dubbed Balmer jump Galaxies BJGs. We apply the iSEDfit Bayesian approach to fit each detailed SED and determine star-formation rate (SFR), stellar mass, age and absolute magnitudes. The mass of the haloes where these samples reside are found via a clustering analysis. Five volume-limited BJG sub-samples with different mean redshifts are found to reside in haloes of median masses slightly increasing toward z=0.5. This increment is similar to numerical simulations results which suggests that we are tracing the evolution of an evolving population of haloes as they grow to reach a mass of $\sim…
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