Unveiling VVV/WISE Mira variables on the far side of the Galactic disk: distances, kinematics, and a new extinction law

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dc.article.numberA28
dc.catalogadorpva
dc.contributor.authorAlbarracín Contreras, Ricardo Rogelio
dc.contributor.authorZoccali, Manuela
dc.contributor.authorOlivares Carvajal, Julio Ariel
dc.contributor.authorRojas Arriagada, Alvaro
dc.contributor.authorMinniti, Javier Horacio
dc.contributor.authorCatelan, Márcio
dc.contributor.authorDe Leo, M.
dc.contributor.authorGran Merino, Felipe Eduardo
dc.contributor.authorContreras Ramos, Rodrigo Andrés
dc.contributor.authorValenzuela Navarro, Álvaro Enrique Hernán
dc.contributor.authorSalvo Guajardo, Claudio Andrés
dc.date.accessioned2025-03-19T15:59:35Z
dc.date.available2025-03-19T15:59:35Z
dc.date.issued2024
dc.description.abstractContext. The structure and kinematics of the Milky Way disk are largely inferred from the solar vicinity. To gain a comprehensive understanding, it is essential to find reliable tracers in less explored regions such as the bulge and the far side of the disk. Mira variables, which are well studied and bright standard candles, offer an excellent opportunity to trace intermediate and old populations in these complex regions., Aims. We aim to isolate a clean sample of Miras in the VISTA Variables in the Via Lactea survey using Gaussian process algorithms. This sample will be used to study intermediate and old age populations in the Galactic bulge and far disk., Methods. Near- and mid-infrared time-series photometry were processed using Gaussian Process algorithms to identify Mira variables and model their light curves. We calibrated selection criteria with a visually inspected sample to create a high-purity sample of Miras, integrating multiband photometry and kinematic data from proper motions., Results. We present a catalog of 3602 Mira variables. By analyzing photometry, we classify them by O-rich or C-rich surface chemistry and derive selective-to-total extinction ratios of A(Ks)/E(J - K-s) = 0.471 +/- 0.01 and A(Ks)/E(H - K-s) = 1.320 +/- 0.020. Using the Mira period-age relation, we find evidence supporting the inside-out formation of the Milky Way disk. The distribution of proper motions and distances aligns with the Galactic rotation curve and disk kinematics. We extend the rotation curve up to R-GC similar to 17 kpc and find no strong evidence of the nuclear stellar disk in our Mira sample. This study constitutes the largest catalog of variable stars on the far side of the Galactic disk to date.
dc.fechaingreso.objetodigital2025-03-19
dc.format.extent19 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1051/0004-6361/202452041
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/202452041
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/102817
dc.identifier.wosidWOS:001383026800011
dc.information.autorucInstituto de Astrofísica; Albarracín Contreras, Ricardo Rogelio; S/I; 1044964
dc.information.autorucInstituto de Astrofísica; Zoccali, Manuela; 0000-0002-5829-2267; 1003159
dc.information.autorucInstituto de Astrofísica; Olivares Carvajal, Julio Ariel; S/I; 213510
dc.information.autorucInstituto de Astrofísica; Rojas Arriagada, Alvaro; 0000-0003-0208-8854; 154618
dc.information.autorucInstituto de Física; Minniti, Javier Horacio; S/I; 242990
dc.information.autorucInstituto de Astrofísica; Catelan, Márcio; 0000-0001-6003-8877; 1001556
dc.information.autorucInstituto de Astrofísica; Gran Merino, Felipe Eduardo; S/I; 177473
dc.information.autorucInstituto de Astrofísica; Contreras Ramos, Rodrigo Andrés; S/I; 3820
dc.information.autorucInstituto de Astrofísica; Valenzuela Navarro, Álvaro Enrique Hernán; S/I; 1039080
dc.information.autorucInstituto de Astrofísica; Salvo Guajardo, Claudio Andrés; S/I; 1046061
dc.language.isoen
dc.nota.accesocontenido completo
dc.publisherEDP Sciences
dc.revistaAstronomy & Astrophysics
dc.rightsacceso abierto
dc.rights.licenseAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectStars: AGB and post-AGB
dc.subjectStars: variables: general
dc.subjectGalaxy: bulge
dc.subjectGalaxy: disk
dc.subjectGalaxy: kinematics and dynamics
dc.subjectGalaxy: structure
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleUnveiling VVV/WISE Mira variables on the far side of the Galactic disk: distances, kinematics, and a new extinction law
dc.typeartículo
dc.volumen693
sipa.codpersvinculados1044964
sipa.codpersvinculados1003159
sipa.codpersvinculados213510
sipa.codpersvinculados154618
sipa.codpersvinculados242990
sipa.codpersvinculados1001556
sipa.codpersvinculados177473
sipa.codpersvinculados3820
sipa.codpersvinculados1039080
sipa.codpersvinculados1046061
sipa.trazabilidadORCID;2025-03-03
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