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    The distance to the WN8 star We 21

    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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    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.


    Item Type: Article
    School: School of Science > Earth and Planetary Sciences
    Depositing User: Sarah Hall
    Date Deposited: 19 Aug 2019 15:25
    Last Modified: 21 Jun 2021 17:22


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