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The dual dust chemistry - Binarity connection

De Marco, O; Jones, AF; Barlow, MJ; Cohen, M; Bond, HE; Harmer, D; (2004) The dual dust chemistry - Binarity connection. In: Meixner, M and Kastner, JH and Balick, B and Soker, N, (eds.) Proceedings of the Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird. (pp. pp. 100-103). Astronomical Society of the Pacific: San Francisco. Green open access

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Abstract

Accumulating evidence points to a binary nature for the Wolf-Rayet ([WC]) central stars, a group that constitutes about 15% of all central stars of planetary nebula. From ISO observations, a dual dust chemistry (oxygen- and carbon-rich) has been shown to be almost exclusively associated with [WC] central stars, a fact that could be explained by O-rich dust residing in a disk, while the C-rich dust is more widely distributed. HST/STIS spatially resolved spectroscopy of the [WC10] central star \cpd\ is interpreted as revealing a dust disk or torus around the central star. This, together with \cpd's variable lightcurve, is taken as an indirect indication of binarity. Finally, we present here, for the first time, preliminary results from a radial velocity survey of central stars. Out of 18 stars with excellent data at least 8 are radial velocity variables. If these turn out to be binaries, it is likely that the central star binary fraction is as high as ∼50;%.

Type: Proceedings paper
Title: The dual dust chemistry - Binarity connection
Event: Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird
Location: Washington, USA
Dates: 28th July 2003 - 1st August 2003
Open access status: An open access version is available from UCL Discovery
Publisher version: http://articles.adsabs.harvard.edu/cgi-bin/nph-iar...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
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/10095993
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