2003A&A...408..141P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.01CEST19:23:20

2003A&A...408..141P - Astronomy and Astrophysics, volume 408, 141-151 (2003/9-2)

Stellar density distribution in the NIR on the Galactic plane at longitudes 15-27 deg. Clues for the Galactic bar?

PICAUD S., CABRERA-LAVERS A. and GARZON F.

Abstract (from CDS):

Garzon et al. (1997ApJ...491L..31G), Lopez-Corredoira et al. (1999AJ....118..381L) and Hammersley et al. (2000MNRAS.317L..45H) have identified in TMGS and DENIS data a large excess of stars at l=27° and b=0° which might correspond to an in-plane bar. We compared near infrared CAIN star counts and simulations from the Besancon Model of Galaxy on 15 fields between 15° and 45° in longitude and -2° 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 6kpc. If this overdensity corresponds to the stellar population of the bar, we estimate its half-length to 3.9±0.4kpc and its angle from the Sun-center direction to 45±9 degrees.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - Galaxy: stellar content - Galaxy: disk

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 LHA 120-S 9 WR* 04 57 41.0340462291 -66 32 42.554870210 12.191 12.91 12.82 12.91 11.781 WN10 49 0
2 HD 269582 WR* 05 27 52.6620154151 -68 59 08.486272253 12.206 10.818 11.093 12.70 11.234 WN10h 96 0
3 CPD-33 4347 WR* 17 18 49.7246525731 -33 57 41.389875461   13.93 12.56 12.21   WN8/WC9 62 0
4 [HJB85] Sgr A-H5 Rad 17 45 38.5 -28 53 28           ~ 17 0
5 NAME Galactic Bar reg ~ ~           ~ 912 0

    Equat.    Gal    SGal    Ecl

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2020.10.01-19:23:20

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