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How to build a 3D extinction model of the Galaxy

Published online by Cambridge University Press:  21 October 2010

J. R. D. Lépine  and
E. B. Amôres
J. R. D. Lépine
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Cidade Universitária, São Paulo, SP, Brazil; email: jacques@astro.iag.usp.br
E. B. Amôres
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Cidade Universitária, São Paulo, SP, Brazil; email: jacques@astro.iag.usp.br
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Abstract

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We show that anomalous extinction (deviations from the traditionally adopted RV = AV/E(B − V) = 3.1 introduces large uncertainties in the distances of stars, for distances larger than 1-2 kpc. We argue that for such distances and for directions close to the galactic plane, the use of extinction models based on the gas distribution in the Galaxy is safer, for the moment, than the use of extinction maps.

Keywords

interstellar extinctiongalactic structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 200 - 201
Copyright
Copyright © International Astronomical Union 2010

References

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