Mapping the stellar age of the Milky Way bulge with the VVV

  title={Mapping the stellar age of the Milky Way bulge with the VVV},
  author={F. Surot and Elena Valenti and Sebastian L. Hidalgo and Manuela Zoccali and E. Sokmen and Marina Rejkuba and Dante Minniti and Oscar A. Gonzalez and Santi Cassisi and Alvio Renzini and Astronomical Observatory and Instituto de Astrof'isica de Canarias and Department of Astrophysics of University of La Laguna and Instituto de Astrof'isica Pontificia Universidad Cat'olica d Chile and Millennium Institute of Astrophysics and Excellence Cluster Universe and Departamento de Ciencias F'isicas Universidad Andr'es Bello and Vatican Observatory and Institute for Astronomy University of Edinburgh and Inaf - Astronomical Observatory of Abruzzo and Infn and INAF-Osservatorio astronomico di Padova and Max-Planck-Institut fur Astrophysik},
  journal={Astronomy \& Astrophysics},
Context. A detailed study of the Galactic bulge stellar population necessarily requires an accurate representation of the interstellar extinction, particularly toward the Galactic plane and center, where severe and differential reddening is expected to vary on sub-arcmin scales. Although recent infrared surveys have addressed this problem by providing extinction maps across the whole Galactic bulge area, dereddened color-magnitude diagrams near the plane and center appear systematically… 

The Blanco DECam bulge survey. I. The survey description and early results

The Blanco Dark Energy Camera (DECam) Bulge survey is a Vera Rubin Observatory (LSST) pathfinder imaging survey, spanning ∼200 deg2 of the Southern Galactic bulge, −2° < b < −13° and −11° < l <

VVV WIN 1733−3349: a low extinction window to probe the far side of the Milky Way bulge

Windows of low extinction in the Milky Way (MW) have been used along the past decades for the study of the Galactic structure and the stellar population across the inner bulge and disk. Here we

Maximum entropy estimation of the Galactic bulge morphology via the VVV Red Clump

The abundance and narrow magnitude dispersion of Red Clump (RC) stars make them a popular candidate for mapping the morphology of the bulge region of the Milky Way. Using an estimate of the RC's

VVV Survey Microlensing: Catalog of Best and Forsaken Events

We search for microlensing events in the zero-latitude area of the Galactic Bulge using the VVV Survey near-IR data. We have discovered a total sample of N = 630 events within an area covering 20.68

Exploring the Stellar Age Distribution of the Milky Way Bulge Using APOGEE

We present stellar age distributions of the Milky Way bulge region using ages for ∼6000 high-luminosity ( ), metal-rich ([Fe/H] ≥ −0.5) bulge stars observed by the Apache Point Observatory Galactic

Confirmation and physical characterization of the new bulge globular cluster Patchick 99 from the VVV and Gaia surveys

Context. Globular clusters (GCs) are recognised as important tools for understanding the formation and evolution of the Milky Way (MW) because they are the oldest objects in our Galaxy.

The Milky Way bar/bulge in proper motions: a 3D view from VIRAC and Gaia

We have derived absolute proper motions of the entire Galactic bulge region from VVV Infrared Astrometric Catalogue (VIRAC) and Gaia. We present these both as integrated on-sky maps and, after

Blanco DECam Bulge Survey (BDBS) II: project performance, data analysis, and early science results

The Blanco DECam Bulge Survey (BDBS) imaged more than 200 sq deg of the Southern Galactic bulge using the ugrizY filters of the Dark Energy Camera, and produced point spread function photometry of

Mapping the Interstellar Reddening and Extinction toward Baade’s Window Using Minimum Light Colors of ab-type RR Lyrae Stars: Revelations from the De-reddened Color–Magnitude Diagrams

We have obtained repeated images of six fields toward the Galactic bulge in five passbands (u, g, r, i, z) with the DECam imager on the Blanco 4 m telescope at CTIO. From more than 1.6 billion

Globular cluster candidates in the Galactic bulge: Gaia and VVV view of the latest discoveries

Context. Thanks to the recent wide-area photometric surveys, the number of star cluster candidates have risen exponentially in the last few years. Most detections, however, are based only on the



Stellar Ages through the Corners of the Boxy Bulge

Aims: In some scenarios for the formation of the Milky Way bulge, the stellar population at the edges of the boxy bulge may be younger than those on the minor axis or close to the Galactic center. So

Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS II. The complete high resolution extinction map and implications for Galactic bulge studies

Context. The Milky Way bulge is the nearest galactic bulge and the most readily accessible laboratory for studies of stellar populations in spheroids based on individual stellar abundances and

Milky Way demographics with the VVV survey - I. The 84-million star colour–magnitude diagram of the Galactic bulge

Context. The Milky Way (MW) bulge is a fundamental Galactic componentfor understanding the formation and evolution of galaxies, in particular our own. The ESO Public Survey VISTA Variables in the V´

Milky Way demographics with the VVV survey

Context. 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 Vía Láctea (VVV)

Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS - III. The first global photometric metallicity map of the Galactic bulge

Aims. We investigate the large-scale metallicity distribution in the Galactic bulge using large spatial coverage to constrain the bulge formation scenario. Methods. We use the VISTA variables in the

Star formation history of the Galactic bulge from deep HST imaging of low reddening windows

Despite the huge amount of photometric and spectroscopic efforts targetting the Galactic bulge over the past few years, its age distribution remains controversial owing to both the complexity of

Age and Metallicity Distribution of the Galactic Bulge from Extensive Optical and Near-IR Stellar Photometry

We present a new determination of the metallicity distribution, age, and luminosity function of the Galactic bulge stellar population. By combining near-IR data from the 2MASS survey, from the SOFI

Mapping the three-dimensional density of the galactic bulge with VVV red clump stars

The inner Milky Way is dominated by a boxy, triaxial bulge which is believed to have formed through disk instability processes. Despite its proximity, its large-scale properties are still not very

Stellar density profile and mass of the Milky Way Bulge from VVV data

We present the first stellar density profile of the Milky Way bulge that reaches latitude b = 0◦. The profile was derived by counting red clump stars within the colour-magnitude diagram that was

The inner Galactic bar traced by the VVV survey

Aims. We use the VVV survey observations in bulge regions close to the Galactic plane to trace the bar inclination at the Galactic latitude b ∼± 1 and to investigate a distinct structure in the inner