Astronomy and Astrophysics | VOL. 435

86 GHz SiO maser survey of late-type stars in the inner Galaxy : III. Interstellar extinction and colours of the SiO targets

Publication Date May 1, 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 A A 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 .


Mira Stars Near-infrared Extinction Law Stars Maser 2MASS Extinction Power Law Late-type Stars Galaxy Colours Of Stars

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