Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...352..459c&link_type=abstract
Astronomy and Astrophysics, v.352, p.459-468 (1999)
Astronomy and Astrophysics
Astrophysics
40
Ism: Dust, Extinction, Galaxy: Globular Clusters: General, Galaxy: Open Clusters And Associations: General, Methods: Statistical, Astronomical Data Bases: Miscellaneous, Galaxy: Solar Neighbourhood
Scientific paper
We propose a new 3-dimensional extinction model based on the COBE/IRAS all sky reddening map. Its application to globular and open cluster data evidences that the COBE/IRAS reddening map has an accuracy of 18%, but overestimates visual absorption by a factor of 1.16. This systematic error does not change with galactic latitude and opacity significantly. The implementation of the new extinction model has optimized our galactic structure and kinematic model to low-galactic latitudes. Four star count samples distributed in different galactic directions have been compared with galactic model simulations. Numerical experiments allow us to constrain the radial distribution of the galactic disk. The disk scale length is found to be 2250 +/- 50 pc and the displacement of the Sun from the galactic plane ZSun = 27.5 +/- 6.0 pc.
Chen Bohui
Figueras F.
Galadi-Enriquez David
Jordi Carme
Luri Xavier
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