Stellar density distribution in the NIR on the Galactic plane at longitudes 15–27 deg. Clues for the Galactic bar?
CNRS UMR 6091, Observatoire de Besançon, BP 1615, 25010 Besançon Cedex, France
2 Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
3 Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain
Corresponding author: S. Picaud, email@example.com
Accepted: 28 May 2003
Garzón et al. ([CITE]), López-Corredoira et al. ([CITE]) and Hammersley et al. ([CITE]) have identified in TMGS and DENIS data a large excess of stars at and which might correspond to an in-plane bar. We compared near infrared CAIN star counts and simulations from the Besançon Model of Galaxy on 15 fields between 15° and 45° in longitude and and 2° in latitude. Comparisons confirm the existence of an overdensity at longitudes lower than 27° which is inhomogeneous and decreases very steeply off the Galactic plane. The observed excess in the star distribution over the predicted density is even higher than 100%. Its distance from the sun is estimated to be lower than 6 kpc. If this overdensity corresponds to the stellar population of the bar, we estimate its half-length to kpc and its angle from the Sun-center direction to degrees.
Key words: Galaxy: structure / Galaxy: stellar content / Galaxy: disk
© ESO, 2003