Crowther, PA;
Fullerton, AW;
Hillier, DJ;
Brownsberger, KR;
Dessart, L;
Willis, AJ;
De Marco, O;
... Massa, DL; + view all
(2000)
Far-UV FUSE spectroscopy of the OVI resonance doublet in Sand2 (WO).
The Astrophysical Journal
, 538
L51-L55.
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Abstract
We present Far-Ultraviolet Spectroscopic Explorer (FUSE) spectroscopy of Sand 2, a LMC WO-type Wolf-Rayet star, revealing the OVI resonance P Cygni doublet at 1032-38A. These data are combined with HST/FOS ultraviolet and Mt Stromlo 2.3m optical spectroscopy, and analysed using a spherical, non-LTE, line-blanketed code. Our study reveals exceptional stellar parameters: T*=150,000K, v_inf=4100 km/s, log (L/Lo)=5.3, and Mdot=10^-5 Mo/yr if we adopt a volume filling factor of 10%. Elemental abundances of C/He=0.7+-0.2 and O/He=0.15(-0.05+0.10) by number qualitatively support previous recombination line studies. We confirm that Sand 2 is more chemically enriched in carbon than LMC WC stars, and is expected to undergo a supernova explosion within the next 50,000 yr.
| Type: | Article |
|---|---|
| Title: | Far-UV FUSE spectroscopy of the OVI resonance doublet in Sand2 (WO) |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://ui.adsabs.harvard.edu/abs/2000astro.ph..50... |
| 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: | Astronomy, FUSE, resonance, spectroscopy |
| 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/10096060 |
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