Milky Way analogues in MaNGA: multiparameter homogeneity and comparison to the Milky Way

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dc.contributor.authorBoardman, N.
dc.contributor.authorZasowski, G.
dc.contributor.authorSeth, A.
dc.contributor.authorNewman, J.
dc.contributor.authorAndrews, B.
dc.contributor.authorBershady, M.
dc.contributor.authorBird, J.
dc.contributor.authorChiappini, C.
dc.contributor.authorFielder, C.
dc.contributor.authorFraser-McKelvie, A.
dc.contributor.authorJones, A.
dc.contributor.authorLicquia, T.
dc.contributor.authorMasters, K. L.
dc.contributor.authorMinchev, I
dc.contributor.authorSchiavon, R. P.
dc.contributor.authorBrownstein, J. R.
dc.contributor.authorDrory, N.
dc.contributor.authorLane, R. R.
dc.date.accessioned2025-01-23T19:54:40Z
dc.date.available2025-01-23T19:54:40Z
dc.date.issued2020
dc.description.abstractThe Milky Way provides an ideal laboratory to test our understanding of galaxy evolution, owing to our ability to observe our Galaxy over fine scales. However, connecting the Galaxy to the wider galaxy population remains difficult, due to the challenges posed by our internal perspective and to the different observational techniques employed. Here, we present a sample of galaxies identified as Milky Way analogues on the basis of their stellar masses and bulge-to-total ratios, observed as part of the Mapping Nearby Galaxies at Apache Point Observatory survey. We analyse the galaxies in terms of their stellar kinematics and populations as well as their ionized gas contents. We find our sample to contain generally young stellar populations in their outskirts. However, we find a wide range of stellar ages in their central regions, and we detect central active galactic nucleus-like or composite-like activity in roughly half of the sample galaxies, with the other half consisting of galaxies with central star-forming emission or emission consistent with old stars. We measure gradients in gas metallicity and stellar metallicity that are generally flatter in physical units than those measured for the Milky Way; however, we find far better agreement with the Milky Way when scaling gradients by galaxies' disc scale lengths. From this, we argue much of the discrepancy in metallicity gradients to be due to the relative compactness of the Milky Way, with differences in observing perspective also likely to be a factor.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stz3126
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stz3126
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100693
dc.identifier.wosidWOS:000512306500041
dc.issue.numero3
dc.language.isoen
dc.pagina.final3701
dc.pagina.inicio3672
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectISM: structure
dc.subjectgalaxies: ISM
dc.subjectgalaxies: kinematics and dynamics
dc.subjectgalaxies: spiral
dc.subjectgalaxies: stellar content
dc.subjectgalaxies: structure
dc.titleMilky Way analogues in MaNGA: multiparameter homogeneity and comparison to the Milky Way
dc.typeartículo
dc.volumen491
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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