Infrared Observations of Southern WC9 Stars and He 2-113
Open Access
- 1 December 1975
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 173 (3) , 489-496
- https://doi.org/10.1093/mnras/173.3.489
Abstract
Observations between 1·57 and 4·7 μ are presented of eight southern WC9 stars. Three of these possess well-defined blackbody components in the near-infrared region suggesting that thermal emission by large graphite grains is observed. None of the eight stars can be identified as a relatively evolved WC9 star like Ve 2-45. New observations are also presented of the object He 2-113 in the range 3·8–19·6 μ, which confirm the suggestion that it represents a very cool WC-type nucleus of a planetary nebula. A very large ratio of infrared to Lα luminosity is found for this star.Keywords
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