UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Silicate and hydrocarbon emission from Galactic M supergiants

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. Green open access

[thumbnail of sylvester98_msgts.pdf]
Preview
Text
sylvester98_msgts.pdf - Published version

Download (1MB) | Preview

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 > 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
Downloads since deposit
13Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item