Clues on the stellar content of disturbed early-type galaxies: the case of NGC 4382

FAVIO FAIFER; LEANDRO SESTO; CARLOS ESCUDERO; ANALÍA SMITH CASTELLI; VICTORIA REYNALDI; ARIANNA CORTESI

Buenos Aires

Congreso; 64 Reunión Anual de la Asociación Argentina de Astronomía; 2022

Instituto de Astronomía y Física del Espacio

NGC 4382 is a massive early-type galaxy, belonging to Virgo cluster. This galaxy shows clear evidence of having gone through interactions and mergers in the last few Gyr. Recently, we have studied its globular cluster content and confirmed the presence of a young globular cluster population in addition to the elder one. Does this galaxy hide more clues about such a switch-on of stellar formation? We are looking for traces of the star formation history applying a full-spectrum fitting technique to Gemini/GMOS longslit data at different galactocentric radii. Our preliminary results shows that, as expected in early type systems, NGC 4382 has formed the bulk of its stellar content 10^10 years ago. However, it indeed reignited star formation (and likely more than once since the main burst) with enriched interstellar matter.