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dc.contributor.author
Alonso-García, Javier
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Saito, Roberto K.
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Hempel, Maren
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Minniti, Dante
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Pullen, Joyce
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Catelan, Márcio
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Ramos, Rodrigo Contreras
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Cross, Nicholas J. G.
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Gonzalez, Oscar A.
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Lucas, Philip W.
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Palma, Tali
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Valenti, Elena
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Zoccali, Manuela
dc.date.available
2020-03-21T22:00:56Z
dc.date.issued
2018-11
dc.identifier.citation
Alonso-García, Javier; Saito, Roberto K.; Hempel, Maren; Minniti, Dante; Pullen, Joyce; et al.; Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk; EDP Sciences; Astronomy and Astrophysics; 619; 11-2018; 4-15
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/100601
dc.description.abstract
The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Vía Láctea (VVV) ESO Public Survey has observed this zone at near-infrared wavelengths where reddening is highly diminished. Aims. By exploiting the high resolution and wide field-of-view of the VVV images we aim to produce a deep, homogeneous, and highly complete database of sources that cover the innermost regions of our Galaxy. Methods. To better deal with the high crowding in the surveyed areas, we have used point spread function (PSF)-fitting techniques to obtain a new photometry of the VVV images, in the ZY JHKs near-infrared filters available. Results. Our final catalogs contain close to one billion sources, with precise photometry in up to five near-infrared filters, and they are already being used to provide an unprecedented view of the inner Galactic stellar populations. We make these catalogs publicly available to the community. Our catalogs allow us to build the VVV giga-CMD, a series of color-magnitude diagrams of the inner regions of the Milky Way presented as supplementary videos. We provide a qualitative analysis of some representative CMDs of the inner regions of the Galaxy, and briefly mention some of the studies we have developed with this new dataset so far.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CATALOGS
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GALAXY: BULGE
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GALAXY: DISK
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GALAXY: STELLAR CONTENT
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SURVEYS
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TECHNIQUES: PHOTOMETRIC
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-03-13T18:10:58Z
dc.journal.volume
619
dc.journal.pagination
4-15
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Alonso-García, Javier. Universidad de Antofagasta; Chile. Universidad Andrés Bello; Chile
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Fil: Saito, Roberto K.. Universidade Federal de Santa Catarina; Brasil
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Fil: Hempel, Maren. Pontificia Universidad Católica de Chile; Chile
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Fil: Minniti, Dante. Universidad Andrés Bello; Chile
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Fil: Pullen, Joyce. Universidad Andrés Bello; Chile
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Fil: Catelan, Márcio. Pontificia Universidad Católica de Chile; Chile
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Fil: Ramos, Rodrigo Contreras. Pontificia Universidad Católica de Chile; Chile
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Fil: Cross, Nicholas J. G.. University of Edinburgh; Reino Unido
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Fil: Gonzalez, Oscar A.. Royal Observatory; Reino Unido
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Fil: Lucas, Philip W.. University Of Hertfordshire; Reino Unido
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Fil: Palma, Tali. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Observatorio Astronomico de la Universidad Nacional de Cordoba; Argentina
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Fil: Valenti, Elena. European Southern Observatory; Alemania
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Fil: Zoccali, Manuela. Pontificia Universidad Católica de Chile; Chile
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201833432
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