86 GHz SiO maser survey of late-type stars in the inner Galaxy. III. Interstellar extinction and colours of the SiO targets
Abstract
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 A_λ ∝ λ^-1.9±0.1. 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 10-5~M_⊙ yr-1.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2005
- DOI:
- 10.1051/0004-6361:20040533
- arXiv:
- arXiv:astro-ph/0503179
- Bibcode:
- 2005A&A...435..575M
- Keywords:
-
- dust;
- extinction;
- stars: AGB and post-AGB;
- stars: mass-loss;
- infrared: stars;
- circumstellar matter;
- Galaxy: stellar content;
- Astrophysics
- E-Print:
- 12 pages, 10 figures. Accepted for publication in A&