Volume 435, Number 2, May IV 2005
|Page(s)||575 - 585|
|Section||Interstellar and circumstellar matter|
|Published online||29 April 2005|
86 GHz SiO maser survey of late-type stars in the inner Galaxy
III. Interstellar extinction and colours of the SiO targets
European Southern Observatory, Karl Schwarzschild-Strasse 2, 85748 Garching bei Munchen, Germany e-mail: firstname.lastname@example.org
2 Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
3 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
4 Institut d'Astrophysique de Paris, CNRS & Université Paris 6, 98bis Bd Arago, 75014 Paris, France
5 National Radio Astronomy Observatory, PO Box 0, Socorro NM 87801, USA
6 Radioastronomisches Institut der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
Accepted: 14 January 2005
We have determined extinction corrections for a sample of 441 late-type stars in the inner Galaxy, which we previously searched for SiO maser emission, using the 2MASS near-infrared photometry of the surrounding stars. From this, the near-infrared extinction law is found to be approximated by a power law . Near- and mid-infrared colour–colour properties of known Mira stars are reviewed. From the distribution of the dereddened infrared colours of the SiO target stars we infer mass-loss rates between 10-7 and yr-1.
Key words: dust, extinction / stars: AGB and post-AGB / stars: mass-loss / infrared: stars / circumstellar matter / Galaxy: stellar content
© ESO, 2005
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