Cohen, M;
Barlow, MJ;
Kuhi, LV;
(1975)
Wolf-Rayet stars. VI. The nature of the optical and infrared continuum.
Astronomy & Astrophysics
, 40
(3)
pp. 291-302.
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Abstract
Results of IR photometry between 1.6 and 11.3 microns are combined with results of scanner photometry between 3300 and 11,100 A to produce composite energy distributions for Wolf-Rayet stars. Reddening corrections are subtracted from the distributions to obtain IR-excess difference spectra which are fitted to either free-free emission or blackbody-like continua. WN stars are found to exhibit only free-free emission, while only WC stars show effects due to dust. Red and near-IR spectra are obtained for WC9 stars, and evidence is presented in favor of visual extinction by circumstellar dust around the star Ve2-45. The IR excesses in WC stars are interpreted as thermal emission by graphite grains; on this basis, radii and dust masses of circumstellar shells are estimated. Based on all these results, an evolutionary scheme is suggested for WC9 stars.
| Type: | Article |
|---|---|
| Title: | Wolf-Rayet stars. VI. The nature of the optical and infrared continuum |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://ui.adsabs.harvard.edu/abs/1975A%26A....40.... |
| 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: | Science & Technology, Physical Sciences, Astronomy & Astrophysics |
| 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/10095214 |
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