INVESTIGADORES
GUROVICH Sebastian
artículos
Título:
Milky Way demographics with the VVV survey. II. Color transformations and near-infrared photometry for 136 million stars in the southern Galactic disk
Autor/es:
SOTO, M.; BARBÁ, R.; GUNTHARDT, G.; MINNITI, D.; LUCAS, P.; MAJAESS, D.; IRWIN, M.; EMERSON, J. P.; GONZALEZ-SOLARES, E.; HEMPEL, M.; SAITO, R. K.; GUROVICH, S.; ROMAN-LOPES, A.; MONI-BIDIN, C.; SANTUCHO, M. V.; BORISSOVA, J.; KURTEV, R.; TOLEDO, I.; GEISLER, D.; DOMINGUEZ, M.; BEAMIN, J. C.
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2013 vol. 552 p. 101 - 123
ISSN:
0004-6361
Resumen:
The new multi-epoch near-infrared VISTA Variables in the Vía Láctea (VVV) survey is sampling 562 deg2 of the Galactic bulge
and adjacent regions of the disk. Accurate astrometry established for the region surveyed allows the VVV data to be merged with
overlapping surveys (e.g., GLIMPSE, WISE, 2MASS, etc.), thereby enabling the construction of longer baseline spectral energy
distributions for astronomical targets. However, in order to maximize use of the VVV data, a set of transformation equations are
required to place the VVV JHKs photometry onto the 2MASS system. The impetus for this work is to develop those transformations
via a comparison of 2MASS targets in 152 VVV fields sampling the Galactic disk. The transformation coefficients derived exhibit
a reliance on variables such as extinction. The transformed data were subsequently employed to establish a mean reddening law of
EJ−H/EH−Ks = 2.13 ± 0.04, which is the most precise determination to date and merely emphasizes the pertinence of the VVV data
for determining such important parameters.