Searching for extragalactic sources in the VISTA variables in the Via láctea survey

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dc.contributor.authorBaravalle, L.D.
dc.contributor.authorAlonso, M.V.
dc.contributor.authorCastellón, J.L.N.
dc.contributor.authorBeamín, J.C.
dc.contributor.authorMinniti, D.
dc.date.accessioned2018-06-26T19:53:05Z
dc.date.available2018-06-26T19:53:05Z
dc.date.issued2018
dc.descriptionIndexación: Scopus.es_ES
dc.description.abstractWe search for extragalactic sources in the VISTA Variables in the Vía Láctea survey that are hidden by the Galaxy. Herein, we describe our photometric procedure to find and characterize extragalactic objects using a combination of SExtractor and PSFEx. It was applied in two tiles of the survey: d010 and d115, without previous extragalactic IR detections, in order to obtain photometric parameters of the detected sources. The adopted criteria to define extragalactic candidates include CLASS-STAR < 0.3; 1.0 < R1 2 < 5.0 arcsec; 2.1 < C < 5; and F > 0.002 and the colors: 0.5 < (J-Ks) < 2.0 mag; 0.0 < (J-H) < 1.0 mag; 0.0 < (H-Ks) < 2.0 mag and (J-H) + 0.9 (H-Ks) > 0.44 mag. We detected 345 and 185 extragalactic candidates in the d010 and d115 tiles, respectively. All of them were visually inspected and confirmed to be galaxies. In general, they are small and more circular objects, due to the near-IR sensitivity to select more compact objects with higher surface brightness. The procedure will be used to identify extragalactic objects in other tiles of the VVV disk, which will allow us to study the distribution of galaxies and filaments hidden by the Milky Way.es_ES
dc.description.urihttp://iopscience.iop.org/article/10.3847/1538-3881/aa9ee2/meta
dc.identifier.citationAstronomical Journal, 155(1), art. no. 155.es_ES
dc.identifier.issn0004-6256
dc.identifier.otherDOI: 10.3847/1538-3881/aa9ee2
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/6200
dc.language.isoenes_ES
dc.publisherInstitute of Physics Publishinges_ES
dc.subjectCatalogses_ES
dc.subjectGalaxies: Fundamental Parameterses_ES
dc.subjectGalaxies: Photometryes_ES
dc.subjectSurveyses_ES
dc.titleSearching for extragalactic sources in the VISTA variables in the Via láctea surveyes_ES
dc.typeArtículoes_ES
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