Formation of S0s in extreme environments I: clues from kinematics and stellar populations

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dc.contributor.authorCoccato, Lodovico
dc.contributor.authorJaffe, Yara L.
dc.contributor.authorCortesi, Arianna
dc.contributor.authorMerrifield, Michael
dc.contributor.authorJohnston, Evelyn
dc.contributor.authorRodriguez del Pino, Bruno
dc.contributor.authorHaeussler, Boris
dc.contributor.authorChies-Santos, Ana L.
dc.contributor.authorMendes de Oliveira, Claudia L.
dc.contributor.authorSheen, Yun-Kyeong
dc.contributor.authorMenendez-Delmestre, Karin
dc.date.accessioned2025-01-23T19:54:34Z
dc.date.available2025-01-23T19:54:34Z
dc.date.issued2020
dc.description.abstractDespite numerous efforts, it is still unclear whether lenticular galaxies (S0s) evolve from spirals whose star formation was suppressed, or formed trough mergers or disc instabilities. In this paper we present a pilot study of 21 S0 galaxies in extreme environments (field and cluster), and compare their spatially resolved kinematics and global stellar populations. Our aim is to identify whether there are different mechanisms that form S0s in different environments. Our results show that the kinematics of S0 galaxies in field and cluster are, indeed, different. Lenticulars in the cluster are more rotationally supported, suggesting that they are formed through processes that involve the rapid consumption or removal of gas (e.g. starvation, ram pressure stripping). In contrast, S0s in the field are more pressure supported, suggesting that minor mergers served mostly to shape their kinematic properties. These results are independent of total mass, luminosity, or disc-to-bulge ratio. On the other hand, the mass-weighted age, metallicity, and star formation time-scale of the galaxies correlate more with mass than with environment, in agreement with known relations from previous work, such as the one between mass and metallicity. Overall, our results re-enforce the idea that there are multiple mechanisms that produce S0s, and that both mass and environment play key roles. A larger sample is highly desirable to confirm or refute the results and the interpretation of this pilot study.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stz3592
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stz3592
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100690
dc.identifier.wosidWOS:000512297600104
dc.issue.numero2
dc.language.isoen
dc.pagina.final2972
dc.pagina.inicio2955
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies: elliptical and lenticular, cD
dc.subjectgalaxies: formation
dc.subjectgalaxies: kinematics and dynamics
dc.titleFormation of S0s in extreme environments I: clues from kinematics and stellar populations
dc.typeartículo
dc.volumen492
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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