Sylvester, RJ;
Skinner, CJ;
Barlow, MJ;
(1998)
Silicate and hydrocarbon emission from Galactic M supergiants.
Monthly Notices of the Royal Astronomical Society
, 301
(4)
pp. 1083-1094.
10.1046/j.1365-8711.1998.02078.x.
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Abstract
Following our discovery of unidentified infrared (UIR) band emission in a number of M supergiants in h and χ Per, we have obtained 10-μm 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 χ 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.
| Type: | Article |
|---|---|
| Title: | Silicate and hydrocarbon emission from Galactic M supergiants |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1046/j.1365-8711.1998.02078.x |
| Publisher version: | https://doi.org/10.1046/j.1365-8711.1998.02078.x |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | circumstellar matter, stars: mass-loss, supergiants, open clusters and associations: individual: h and χ Per, infrared: stars |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096081 |
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