VVV and VVV-X Surveys: Unveiling the Innermost Milky Way

Tuesday, 29 May 2018 8 a.m. — 9 a.m. MST

AURA Lecture Hall

NOIRLab South Colloquia
JAVIER ALONSO GARCIA (Professor at Centro de Astronomía, Universidad de Antofagasta e Instituto Milenio de Astrofísica and Gemini South Visiting Professor)

Our knowledge of the innermost Milky Way is seriously hampered by the dust and gas present at low latitude lines of sight. The VVV survey can beat these difficulties by observing the Galactic Bulge and inner Disk at near-infrared wavelengths were extinction is highly diminished. Using the 4m VISTA telescope located in Cerro Paranal, the VVV survey provide wide-field high-resolution images of the highly reddened inner Galaxy in the Z, Y, J, H and Ks near infrared filters. In my talk I will present a new photometric catalog that we have built with nearly one billion sources from the inner Galactic regions surveyed by the VVV, and the giga-CMD we have built and that allows a detailed description of the inner Galactic stellar populations. I will also report on the proper characterization of the extinction law towards the inner Milky Way that we have obtained. Finally, I will describe VVV-X, the extended VVV survey, that we are currently running over a much bigger area in the inner Galaxy