Journal
ASTRONOMY & ASTROPHYSICS
Volume 435, Issue 2, Pages 575-585Publisher
E D P SCIENCES
DOI: 10.1051/0004-6361:20040533
Keywords
dust, extinction; stars : AGB and post-AGB; stars : mass-loss; infrared : stars; circumstellar matter; Galaxy : stellar content
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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(lambda) proportional to lambda(-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).
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