55 citations · 239 across the 17 of their papers we have counts for
18 papers
HII-CHI-mistry for active galactic nuclei: optical sulphur abundances without empirical ionisation correction factors
E. Pérez-Montero, O. L. Dors, I. A. Zinchenko +2
> The determination of sulphur abundances in active galactic nuclei (AGN) is uncertain because ionisation correction factors (ICFs) are commonly calibrated for HII regions. We exte…
On the detection of Population III galaxies: Emission Line Diagnostics for Hybrid Stellar Populations
S. Goswami, J. M. Vílchez, C. Kehrig +2
Identifying Population III (Pop III) stars, the first generation of metal-free stars in the early Universe, remains a central challenge in astrophysics. High-ionization emission li…
Why the Northern Hemisphere Needs a 30-40 m Telescope and the Science at Stake: Northern Local Star-forming Dwarf Galaxies. Analogues of the First Galaxies and Probes of the Cosmic Metallicity Scale
C. Esteban, J. M. Vilchez, J. García-Rojas +15
Star-forming dwarf galaxies in the local Universe, especially extremely metal-poor ones, can be considered analogous to early galaxies of the Epoch of Reionization (z >= 6). Curren…
J-PLUS: The stellar mass function of quiescent and star-forming galaxies at 0.05 <= z <= 0.2
F. D. Arizo-Borillo, C. Lopez-Sanjuan, I. Pintos-Castro +22
Aims. We derive the stellar mass function (SMF) of quiescent and star-forming galaxies at z <= 0.2 using 12-band optical photometry from the third data release (DR3) of the Javalam…
Characterizing chemical abundance ratios in extremely metal-poor star-forming galaxies in DESI EDR
I. A. Zinchenko, M. Sobolenko, J. M. Vilchez +1
We present a search for galaxies in the local Universe with extremely low oxygen abundance, that is, more than 25 times lower than solar, which corresponds to 12 + log(O/H) < 7.3.…
Different behaviour of the gas-phase and stellar metallicity in the central part of MaNGA galaxies
I. A. Zinchenko, J. M. Vilchez
We quantified the disparity between gas-phase and stellar metallicity in a large galaxy sample obtained from the MaNGA DR17 survey. We found that the gas metallicity is on average…