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

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dc.contributor.authorValenti, E.
dc.contributor.authorZoccali, M.
dc.contributor.authorGonzalez, O. A.
dc.contributor.authorMinniti, D.
dc.contributor.authorAlonso-Garcia, J.
dc.contributor.authorMarchetti, E.
dc.contributor.authorHempel, M.
dc.contributor.authorRenzini, A.
dc.contributor.authorRejkuba, M.
dc.date.accessioned2025-01-23T21:32:00Z
dc.date.available2025-01-23T21:32:00Z
dc.date.issued2016
dc.description.abstractWe present the first stellar density profile of the Milky Way bulge that reaches latitude b = 0 degrees. 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 vertical bar l vertical bar <= 10 degrees and vertical bar b vertical bar <= 45 degrees 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.(2003), we obtain the first fully empirical estimate of the mass in stars and in remnants of the Galactic bulge. Within (vertical bar b vertical bar < 9.5 degrees, vertical bar l vertical bar < 10 degrees), the Milky Way bulge stellar mass is 2.0 +/- 0.3 x 10(10) M-circle dot..
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201527500
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201527500
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101481
dc.identifier.wosidWOS:000371589800009
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectGalaxy: structure
dc.subjectGalaxy: bulge
dc.titleStellar density profile and mass of the Milky Way bulge from VVV data
dc.typeartículo
dc.volumen587
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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