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 Faculties and Schools > Faculty of Science > School of Natural Sciences |
| Depositing User: | Sarah Hall |
| Date Deposited: | 19 Aug 2019 12:55 |
| Last Modified: | 02 Aug 2023 17:53 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/28626 |
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