2016A&A...587L...6V


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET00:46:19

2016A&A...587L...6V - Astronomy and Astrophysics, volume 587, L6-6 (2016/3-1)

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

VALENTI E., ZOCCALI M., GONZALEZ O.A., MINNITI D., ALONSO-GARCIA J., MARCHETTI E., HEMPEL M., RENZINI A. and REJKUBA M.

Abstract (from CDS):

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 constructed using the new PSF-fitting photometry from VISTA Variables in the Via Lactea (VVV) survey data. The new stellar density map covers the area between |l|≤10° and |b|≤4.5° with unprecedented accuracy, allowing the stellar kinematics from the Giraffe Inner Bulge Spectroscopic Survey (GIBS) to be linked to the stellar mass density distribution. In particular, the location of the central velocity-dispersion peak from GIBS matches a high over-density in the VVV star count map. By scaling the total luminosity function (LF) obtained from all VVV fields to the LF from Zoccali et al.(2003A&A...399..931Z), we obtain the first fully empirical estimate of the mass in stars and in remnants of the Galactic bulge. Within (|b|<9.5°, |l|<10°), the Milky Way bulge stellar mass is 2.0±0.3x1010M.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - Galaxy: bulge

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 11999 0
2 NAME Baade Window reg 18 03.5 -30 01           ~ 549 3
3 NAME Galactic Bulge reg ~ ~           ~ 3531 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-00:46:19

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