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Five WC9 stars discovered in the AAO/UKST Hα survey

Hopewell, EC; Barlow, MJ; Drew, JE; Unruh, YC; Parker, QA; Pierce, MJ; Crowther, PA; ... Zijlstra, AA; + view all (2005) Five WC9 stars discovered in the AAO/UKST Hα survey. Monthly Notices of the Royal Astronomical Society , 363 (3) pp. 857-866. 10.1111/j.1365-2966.2005.09487.x. Green open access

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Abstract

We report the discovery of five massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission-line stars in the Anglo-Australian Observatory United Kingdom Schmidt Telescope (AAO/UKST) Southern Galactic Plane Hα survey. The 6195–6775 Å spectra of the stars are presented and discussed. A WC9 class is assigned to all five stars through comparison of their spectra with those of known late-type WC stars, bringing the known total number of Galactic WC9 stars to 44. Whilst three of the five WC9 stars exhibit near-infrared (NIR) excesses characteristic of hot dust emission (as seen in the great majority of known WC9 stars), we find that two of the stars show no discernible evidence of such excesses. This increases the number of known WC9 stars without NIR excesses to seven. Reddenings and distances for all five stars are estimated.

Type: Article
Title: Five WC9 stars discovered in the AAO/UKST Hα survey
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/j.1365-2966.2005.09487.x
Publisher version: https://doi.org/10.1111/j.1365-2966.2005.09487.x
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: surveys, circumstellar matter, stars: Wolf-Rayet, Galaxy: stellar content
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/10095599
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