The origin of star-gas misalignments in simulated galaxies

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dc.contributor.authorCasanueva, Catalina, I
dc.contributor.authorLagos, Claudia del P.
dc.contributor.authorPadilla, Nelson D.
dc.contributor.authorDavison, Thomas A.
dc.date.accessioned2025-01-20T21:05:40Z
dc.date.available2025-01-20T21:05:40Z
dc.date.issued2022
dc.description.abstractWe study the origin of misalignments between the stellar and star-forming gas components of simulated galaxies in the eagle simulations. We focus on galaxies with stellar masses >= 10(9) M-circle dot at 0 <= z <= 1. We compare the frequency of misalignments with observational results from the SAMI survey and find that overall, eagle can reproduce the incidence of misalignments in the field and clusters, as well as the dependence on stellar mass and optical colour within the uncertainties. We study the dependence on kinematic misalignments with internal galaxy properties and different processes related to galaxy mergers and sudden changes in stellar and star-forming gas mass. We find that galaxy mergers happen in similar frequency in mis- and aligned galaxies, with the main difference being misaligned galaxies showing a higher tidal field strength and fraction of ex situ stars. We find that despite the environment being relevant in setting the conditions to misalign the star-forming gas, the properties internal to galaxies play a crucial role in determining whether the gas quickly aligns with the stellar component or not. Hence, galaxies that are more triaxial and more dispersion dominated display more misalignments because they are inefficient at realigning the star-forming gas towards the stellar angular momentum vector.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stac523
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stac523
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93312
dc.identifier.wosidWOS:000811792500013
dc.issue.numero2
dc.language.isoen
dc.pagina.final2048
dc.pagina.inicio2031
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies: evolution
dc.subjectgalaxies: general
dc.subjectgalaxies: kinematics and dynamics
dc.titleThe origin of star-gas misalignments in simulated galaxies
dc.typeartículo
dc.volumen514
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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