IATE   20350
INSTITUTO DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Unidad Ejecutora - UE
artículos
Título:
VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
Autor/es:
MINNITI, LUCAS, EMERSON, SAITO, HEMPEL, PIETRUKOWICZ, AHUMADA, ALONSO, ALONSO-GARCIA, BANDYOPADHYAY, BARBA, BEDIN, BICA, BORISSOVA, BRONFMAN; CATELAN, CLARIA, CROSS, DAVIS, DE GRIJS, DEKANY, DREW, FARINA, FEINSTEIN, FERNANDEZ LAJUS, GAMEN, GEISLER, GIEREN, GOLDMAN, GONZALEZ, GUNTHARDT; GUROVICH, HAMBLY, IRWIN, IVANOV, JORDAN, KERINS, KINEMUCHI, KURTEV, LOPEZ-CORREDOIRA, MACCARONE, MASETTI, MERLO, MESSINEO, MIRABEL,; MONACO, MORELLI, PADILLA, PALMA, PARISI, PIGNATA, REJKUBA, ROMAN-LOPES,SALE; SCHREIBER, SCHROEDER, SMITH, SODRE JR., SOTO, TAMURA, TAPPERT, THOMPSON, TOLEDO, ZOCCALI
Revista:
New Astronomy An International Journal in Astronomy and Astrophysics
Editorial:
Elsevier
Referencias:
Año: 2009
Resumen:
We describe the public ESO near-IR variability survey (VVV) scanning the
Milky Way bulge and an adjacent section of the mid-plane where star
formation activity is high. The survey will take 1929 hours of
observations with the 4-metre VISTA telescope during five years
(2010-2014), covering ~10^9 point sources across an area of 520 deg^2,
including 33 known globular clusters and ~350 open clusters. The final
product will be a deep near-IR atlas in five passbands (0.9-2.5 microns)
and a catalogue of more than 10^6 variable point sources. Unlike
single-epoch surveys that, in most cases, only produce 2-D maps, the VVV
variable star survey will enable the construction of a 3-D map of the
surveyed region using well-understood distance indicators such as RR
Lyrae stars, and Cepheids. It will yield important information on the
ages of the populations. The observations will be combined with data
from MACHO, OGLE, EROS, VST, Spitzer, HST, Chandra, INTEGRAL, WISE,
Fermi LAT, XMM-Newton, GAIA and ALMA for a complete understanding of the
variable sources in the inner Milky Way. This public survey will provide
data available to the whole community and therefore will enable further
studies of the history of the Milky Way, its globular cluster evolution,
and the population census of the Galactic Bulge and center, as well as
the investigations of the star forming regions in the disk. The combined
variable star catalogues will have important implications for
theoretical investigations of pulsation properties of stars.