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

M. Messineo·H. J. Habing·K. M. Menten·A. Omont·L. O. Sjouwerman·F. Bertoldi
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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$_λ\propto λ^{-1.9\pm0.1}$. 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$_\odot$ yr$^{-1}$.

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M. Messineo, H. J. Habing, K. M. Menten, A. Omont, L. O. Sjouwerman, F. Bertoldi. 2005-03-08. 86 GHz SiO maser survey of late-type stars in the Inner Galaxy III. Interstellar extinction and colours of the SiO targets. https://doi.org/10.1051/0004-6361%3A20040533

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