Formation of S0s in extreme environments II: the star-formation histories of bulges, discs and lenses

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dc.contributor.authorJohnston, Evelyn J.
dc.contributor.authorAragón-Salamanca, Alfonso
dc.contributor.authorFraser-Mckelvie, Amelia
dc.contributor.authorMerrifield, Michael
dc.contributor.authorHäußler, Boris
dc.contributor.authorCoccato, Lodovico
dc.contributor.authorJaffé, Yara
dc.contributor.authorCortesi, Ariana
dc.contributor.authorChies-Santos, Ana
dc.contributor.authorRodríguez Del Pino, Bruno
dc.contributor.authorSheen, Yun-Kyeong
dc.date.accessioned2022-11-30T02:46:27Z
dc.date.available2022-11-30T02:46:27Z
dc.date.issued2021
dc.description.abstractDifferent processes have been proposed to explain the formation of S0s, including mergers, disc instabilities, and quenched spirals. These processes are expected to dominate in different environments, and thus leave characteristic footprints in the kinematics and stellar populations of the individual components within the galaxies. New techniques enable us to cleanly disentangle the kinematics and stellar populations of these components in IFU observations. In this paper, we use BUDDI to spectroscopically extract the light from the bulge, disc, and lens components within a sample of eight S0 galaxies in extreme environments observed with MUSE. While the spectra of bulges and discs in S0 galaxies have been separated before, this work is the first to isolate the spectra of lenses. Stellar populations analysis revealed that the bulges and lenses have generally similar or higher metallicities than the discs, and the α-enhancement of the bulges and discs are correlated, while those of the lenses are completely unconnected to either component. We conclude that the majority of the mass in these galaxies was built up early in the lifetime of the galaxy, with the bulges and discs forming from the same material through dissipational processes at high redshift. The lenses, on the other hand, formed over independent time-scales at more random times within the lifetime of the galaxy, possibly from evolved bars. The younger stellar populations and asymmetric features seen in the field S0s may indicate that these galaxies have been affected more by minor mergers than the cluster galaxies.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameJohnston_For2021.pdf
dc.identifier.doihttps://doi.org/10.1093/mnras/staa2838
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7378
dc.languageen
dc.publisherRoyal Astronomical Society
dc.rights© 2020 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectGALAXIES: BULGESen_ES
dc.subjectGALAXIES: DISCen_ES
dc.subjectGALAXIES: ELLIPTICAL AND LENTICULARen_ES
dc.subjectCDen_ES
dc.subjectGALAXIES: FORMATIONen_ES
dc.subjectGALAXIES: STRUCTUREen_ES
dc.titleFormation of S0s in extreme environments II: the star-formation histories of bulges, discs and lenses
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia
uv.notageneralNo disponible para descarga

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