TY  - JOUR
KW  - circumstellar matter
KW  -  stars: mass-loss
KW  -  supergiants
KW  -  open clusters and associations: individual: h and ? Per
KW  -  infrared: stars
ID  - discovery10096081
N2  - Following our discovery of unidentified infrared (UIR) band emission in a number of M supergiants in h and ? Per, we have obtained 10-?m spectra of a sample of 60 galactic M supergiants. Only three new sources, V1749 Cyg, UW Aql and IRC+40 427, appear to show the UIR bands; the others show the expected silicate emission or a featureless continuum. The occurrence of UIR-band emission in M supergiants is therefore much higher in the h and ? Per cluster than in the Galaxy as a whole. Possible explanations for the origin and distribution of UIR bands in oxygen-rich supergiants are discussed. We use our spectra to derive mass-loss rates ranging from 10?8 to 10?4 M? yr?1 for the new sample, based on the power emitted in the silicate feature. The relationship between mass-loss rate and luminosity for M supergiants is discussed, and correlations are explored between their mid-infrared emission properties.
PB  - BLACKWELL SCIENCE LTD
TI  - Silicate and hydrocarbon emission from Galactic M supergiants
EP  - 1094
AV  - public
Y1  - 1998/12//
JF  - Monthly Notices of the Royal Astronomical Society
A1  - Sylvester, RJ
A1  - Skinner, CJ
A1  - Barlow, MJ
SN  - 0035-8711
UR  - https://doi.org/10.1046/j.1365-8711.1998.02078.x
N1  - This version is the version of record. For information on re-use, please refer to the publisher?s terms and conditions.
IS  - 4
SP  - 1083
VL  - 301
ER  -