Crawford, Ian and Barlow, M.J. (1991) The distance to the WN8 star We 21. Astronomy & Astrophysics 251 , L39-L42. ISSN 0004-6361.
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Abstract
A high-resolution spectrum of the interstellar Na D lines toward We 21 shows a total velocity extent of about 95 km/s, extending from -65 to +30 km/s in the LSR velocity frame. In this line-of-sight the positive velocities can arise only from beyond the solar circle, and this suggests that We 21 lies in the far part of the Carina spiral arm, at a distance of about 11.5 kpc. Contrary to the conclusions of Duerbeck and Reipurth (1990), We 21 appears to be a massive Population I WN8 star surrounded by a stellar ejecta bubble, and not a PN central star.
Metadata
| Item Type: | Article |
|---|---|
| School: | Birkbeck Faculties and Schools > Faculty of Science > School of Natural Sciences |
| Depositing User: | Sarah Hall |
| Date Deposited: | 19 Aug 2019 15:25 |
| Last Modified: | 02 Aug 2023 17:53 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/28638 |
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