Crawford, IA;
Barlow, MJ;
Diego, F;
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.
10.1093/mnras/266.4.903.
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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.
| Type: | Article |
|---|---|
| Title: | First results from the UHRF: ultra-high-resolution observations of interstellar CH, CH+ and CN towards ζ Ophiuchi |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/266.4.903 |
| Publisher version: | https://doi.org/10.1093/mnras/266.4.903 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | line: profiles, stars: individual: ζ Oph, ISM: molecules |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096171 |
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