Friday, April 24, 2026 at 12:00 pm

JILA Foothills Room

José Antonio Vázquez Mata , Universidad Nacional Autónoma de México (UNAM)

"Morphological characterization of the full MaNGA sample"

Abstract:

In this talk, I will present the MaNGA Visual Morphology (MVM) catalogue, a comprehensive visual classification of 10,059 galaxies from the final MaNGA sample. By combining imaging from SDSS and the DESI Legacy Survey, we classify galaxies into 13 Hubble types, identify tidal features, distinguish bar families, and estimate structural parameters such as concentration, asymmetry, and clumpiness. The greater depth of the DESI Legacy Survey images reveals faint structural details not visible in SDSS alone, enabling more robust and reliable classifications. I will highlight key results from the analysis of this catalogue, including the galaxy stellar mass function decomposed by morphological type. We find that the abundance of early-type galaxies remains roughly constant at low stellar masses, where they are predominantly satellite systems. We confirm that later-type galaxies are generally younger, bluer, more actively star-forming, and less metal-rich than their early-type counterparts. Our analysis also found evidence connecting morphology and stellar mass to the star formation history of galaxies. The MVM catalogue provides a powerful resource for studies of galaxy evolution, secular processes, and the development of machine learning- based morphological classifications. I will conclude by presenting ongoing work based on this dataset, including applications to dwarf galaxies and future surveys such as LSST.

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