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3D Galactic extinction modelling

Published online by Cambridge University Press:  06 January 2014

Richard J. Hanson  and
Coryn A. L. Bailer-Jones
Richard J. Hanson
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany email: hanson@mpia.de
Coryn A. L. Bailer-Jones
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany email: hanson@mpia.de
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Abstract

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Using multi-band photometry we train a forward model to emulate the colour-change due to temperature and extinction for stars. We simultaneously solve for the astrophysical parameters (APs) extinction A0, temperature Teff and distance modulus μr in a Bayesian framework for individual stars. We introduce an HRD prior to account for previous knowledge about the distribution of stars in the temperature- absolute magnitude plane (see also Bailer-Jones 2011). This allows us to infer distance information. We obtain the full three dimensional PDFs of all the stars in a field, allowing us to determine extinction-distance profiles for a given line of sight.

Keywords

methods: statistical - stars: statistics - ISM: dustextinction
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 410
Copyright
Copyright © International Astronomical Union 2014 

References

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Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525CrossRefGoogle Scholar