Artículo
The VVV near-IR galaxy catalogue beyond the Galactic disc
Baravalle, Laura Daniela
; Alonso, Maria Victoria
; Minniti, Dante; Nilo Castellón, José Luis; Soto, Mario; Valotto, Carlos Alberto
; Villalón, Carolina Inés
; Graña, Darío; Amôres, Eduardo B.; Milla Castro, Fernanda
Fecha de publicación:
03/2021
Editorial:
Oxford University Press
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
e-ISSN:
1365-2966
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Knowledge about the large-scale distribution of galaxies is far from complete in the Zone of Avoidance (ZoA), which is mostly due to high interstellar extinction and to source confusion at lower Galactic latitudes. Past near-infrared (NIR) surveys, such as the Two Micron All Sky Survey (2MASS), have shown the power of probing large-scale structure at these latitudes. Our aim is to map the galaxy distribution across the Southern Galactic plane using the VISTA Variables in the Vía Láctea Survey (VVV), which reach 2-4 mag deeper than 2MASS. We used SExtractor+PSFEx to identify extended objects and to measure their sizes, the light concentration index, magnitudes, and colours. Morphological and colour constraints and visual inspection were used to confirm galaxies. We present the resulting VVV NIR Galaxy Catalogue (VVV NIRGC) of 5563 visually confirmed galaxies, of which only 45 were previously known. This is the largest catalogue of galaxies towards the Galactic plane, with 99 per cent of these galaxies being new discoveries. We found that the galaxy density distribution closely resembled the distribution of low interstellar extinction of the existing NIR maps. We also present a description of the 185 2MASS extended sources observed in the region, of which 16 per cent of these objects had no previous description, which we have now classified. We conclude that interstellar extinction and stellar density are the main limitations for the detection of background galaxies in the ZoA. The VVV NIRGC is a new data set providing information for extragalactic studies in the Galactic plane.
Palabras clave:
CATALOGUES
,
GALAXIES: PHOTOMETRY
,
INFRARED: GALAXIES
,
SURVEYS
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Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Baravalle, Laura Daniela; Alonso, Maria Victoria; Minniti, Dante; Nilo Castellón, José Luis; Soto, Mario; et al.; The VVV near-IR galaxy catalogue beyond the Galactic disc; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 502; 1; 3-2021; 601-620
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