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    First results from the UHRF: ultra-high-resolution observations of interstellar CH, CH+ and CN towards ζ Ophiuchi

    Crawford, Ian and Barlow, M.J. and Diego, F. and Spyromilio, J. (1994) First results from the UHRF: ultra-high-resolution observations of interstellar CH, CH+ and CN towards ζ Ophiuchi. Monthly Notices of the Royal Astronomical Society 266 (4), pp. 903-909. ISSN 0035-8711.

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    Abstract

    We present ultra-high-resolution observations (R>700 000) of interstellar CH, CH+ and CN towards ζ Oph obtained with the newly commissioned Ultra-High-Resolution Facility (UHRF) at the AAT. The molecular lines have all been fully resolved, and we discuss their implications for this well-studied molecular sightline. The CH and CN lines each consist of two narrow (b≈0.5 km s−1) components separated by 1.13±0.10 km s−1⁠; an additional broad (b=1.8 km s−1) component is present in CH. We show that the very broad (b=2.1 km s−1) CH+ line profile is consistent with the formation of this molecule in warm haloes surrounding the cold cores responsible for the narrow CH and CN components.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Sarah Hall
    Date Deposited: 19 Aug 2019 12:55
    Last Modified: 21 Aug 2019 10:13
    URI: http://eprints.bbk.ac.uk/id/eprint/28626

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