Milky Way demographics with the VVV survey. IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk

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 Via Lactea (VVV) ESO Public Survey has observed this zone at near-infrared wavelengths where reddening is highly diminished. 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. 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 ZYJHKs near-infrared filters available. 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.

arXiv commentAccepted for publication in A&A, 13 pages, 8 Figures, 1 Table

References in corpus (37)

• VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
• Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
• The UKIDSS Galactic Plane Survey
• The WFCAM Science Archive
• VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea
• Mapping the Three-Dimensional Density of the Galactic Bulge with VVV Red Clump Stars
• Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy
• The Visible and Infrared Survey Telescope for Astronomy (VISTA): Design, Technical Overview and Performance
• The VISTA Science Archive
• Mapping the X-Shaped Milky Way Bulge
• The VISTA ZYJHKs Photometric System: Calibration from 2MASS
• VVV Survey Near-Infrared Photometry of Known Bulge RR Lyrae stars: the Distance to the Galactic Center and Absence of a Barred Distribution of the Metal-Poor Population
• Interstellar Extinction Curve Variations Toward the Inner Milky Way: A Challenge to Observational Cosmology
• Uncloaking globular clusters in the inner Galaxy
• Reddening and metallicity maps of the Milky Way Bulge from VVV and 2MASS. I.The method and minor axis maps
• Stellar density profile and mass of the Milky Way Bulge from VVV data
• Extinction ratios in the inner Galaxy as revealed by the VVV survey
• Milky Way demographics with the VVV survey. I. The 84-million star colour-magnitude diagram of the Galactic bulge
• High-resolution abundance analysis of red giants in the globular cluster NGC 6522
• The Edge of the Milky Way Stellar Disk Revealed Using Clump Giant Stars as Distance Indicators
• OGLE-III Detection of the Anomalous Galactic Bulge Red Giant Branch Bump: Evidence of Enhanced Helium Enrichment
• Variable stars in the VVV globular clusters. I. 2MASS-GC02 and Terzan10
• FSR 1716: A new Milky Way Globular Cluster confirmed using VVV RR Lyrae stars
• Discovery of RR Lyrae Stars in the Nuclear Bulge of the Milky Way
• Milky Way Demographics with the VVV Survey II. Color Transformations and Near-Infrared Photometry for 136 Million Stars in the Southern Galactic Disk
• Identifying Blue Horizontal Branch Stars Using the z Filter
• A new near-IR window of low extinction in the Galactic plane
• Reinforcing the link between the double red clump and the X-shaped bulge of the Milky Way
• Looking for imprints of the first stellar generations in metal-poor bulge field stars
• Searching for Extragalactic Sources in the VISTA Variables in the Vía Láctea Survey
• Milky Way demographics with the VVV Survey III. Evidence for a Great Dark Lane in the 157 Million Star Bulge Color-Magnitude Diagram
• New variable stars discovered in the fields of three Galactic open clusters using the VVV Survey
• Confirmation of a cluster of galaxies hidden behind the Galactic bulge using the VVV Survey
• Young Stellar Clusters Containing Massive Young Stellar Objects in the VVV Survey
• Variable Stars in the Quintuplet stellar cluster with the VVV Survey
• Hot Horizontal Branch Stars in the Galactic Bulge. I
• A Survey for EHB Stars in the Galactic Bulge

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