1998/05/04 by Bing Chen, B. Chen, Jean‐Luc Vergely +8
Economics, Econometrics and Finance · Physics and Astronomy · #Astrophysics (astro-ph) #Economic Growth and Productivity #FOS: Physical sciences #Monetary Policy and Economic Impact #Regional Economic and Spatial Analysis #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9805018
16 pages, 16 figures, latex, accepted for pubblication in Astronomy and Astrophysics Main Journal
arxiv created 1998/05/04 · openalex publication_date 1998/05/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Interstellar absorption in the galactic plane is highly variable from one direction to another. In this paper colour excesses and distances from a new open cluster sample are used to investigate the spatial distribution of the interstellar extinction. An inverse method (Tarantola & Valette, 1982) is used to construct the extinction map in the galactic plane below |b| < 10o. The Av (r,l) diagrams are compared with those derived from individual stars (Arenou et al. 1992, Neckel & Klare 1980). An analytic expression for the interstellar extinction as a function of galactic longitude and distance in the solar neighborhood is given. The comparison of the model predictions with Hipparcos observations in the 4-dimensional space of (V, B-V, Hv, r) shows that our extinction model provides a better fit to the data. However, a new and more detailed extinction model is still lacking.