High resolution observations of interstellar Na I towards HD 174632
Crawford, Ian (1988) High resolution observations of interstellar Na I towards HD 174632. Monthly Notices of the Royal Astronomical Society 233 (4), pp. 923-928. ISSN 0035-8711.
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Abstract
High-resolution observations of interstellar Na I towards the relatively nearby (180 pc) and lightly reddened, [E(B−V)=0.12] B8V star HD 174632 are presented. There are two distinct interstellar cloud components in this line-of-sight, with heliocentric velocities of about −4.4 and −17.6 km s−1. A third, much weaker, component at about −21.7 km s−1 also appears to be present. Na I column densities for these components have been obtained by line-profile fitting, and estimates have been made of the N(Na I)/N(H) ratios. These are found to be consistent with standard diffuse interstellar clouds. Arguments are presented that these clouds are associated with the boundary between the local low-density interstellar bubble and the neighboring Loop I bubble, at a distance between about 50 and 100 pc from the Sun.
Metadata
| Item Type: | Article |
|---|---|
| School: | Birkbeck Faculties and Schools > Faculty of Science > School of Natural Sciences |
| Depositing User: | Sarah Hall |
| Date Deposited: | 20 Aug 2019 08:42 |
| Last Modified: | 02 Aug 2023 17:53 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/28648 |
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