| Texto completo | |
| Autor(es): |
Zhou, Shuang
;
Aragon-Salamanca, Alfonso
;
Merrifield, Michael
;
Sampaio, V. M.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 527, n. 2, p. 15-pg., 2023-11-09. |
| Resumo | |
Even over relatively recent epochs, galaxies have evolved significantly in their location in the mass-metallicity plane, which must be telling us something about the latter stages of galaxy evolution. In this paper, we analyse data from the LEGA-C survey using semi-analytic spectral and photometric fitting to determine these galaxies' evolution up to their observed epoch at z similar to 0.7. We confirm that, at z similar to 0.7, many objects already lie on the present-day mass-metallicity relation, but with a significant tail of high-mass low-metallicity galaxies that is not seen in the nearby Universe. Similar modelling of the evolution of galaxies in the nearby MaNGA survey allows us to reconstruct their properties at z similar to 0.7. Once selection criteria similar to those of LEGA-C are applied, we reassuringly find that the MaNGA galaxies populate the mass-metallicity plane in the same way at z similar to 0.7. Matching the LEGA-C sample to their mass-metallicity 'twins' in MaNGA at this redshift, we can explore the likely subsequent evolution of individual LEGA-C galaxies. Galaxies already on the present-day mass-metallicity relation form few more stars and their discs fade, so they become smaller and more bulge-like. By contrast, the high-mass low-metallicity galaxies grow their discs through late star formation, and evolve rapidly to higher metallicities due to a cut-off in their wind-driven mass-loss. There are significant indications that this late cut-off is associated with the belated end of strong active galactic nucleus activity in these objects. (AU) | |
| Processo FAPESP: | 20/16243-3 - Investigando efeitos ambientais na evolução de galáxias: de simulações cosmológicas a observações |
| Beneficiário: | Vitor Medeiros Sampaio |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 21/13683-5 - A relação entre os mecanismos internos e ambientais de quenching na evolução de galáxias centrais |
| Beneficiário: | Vitor Medeiros Sampaio |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |