SIMBAD references

2000ApJ...538L..51C - Astrophys. J., 538, L51-L55 (2000/July-3)

Far ultraviolet spectroscopic explorer spectroscopy of the O VI resonance doublet in Sand 2 (WO).

CROWTHER P.A., FULLERTON A.W., HILLIER D.J., BROWNSBERGER K., DESSART L., WILLIS A.J., DE MARCO O., BARLOW M.J., HUTCHINGS J.B., MASSA D.L., MORTON D.C. and SONNEBORN G.

Abstract (from CDS):

We present Far Ultraviolet Spectroscopic Explorer spectroscopy of Sand 2, an LMC WO-type Wolf-Rayet star, revealing the O VI resonance P Cygni doublet at 1032-1038 Å. These data are combined with Hubble Space Telescope Faint Object Spectrograph ultraviolet and Mount Stromlo 2.3 m optical spectroscopy and analyzed using a spherical, non-LTE, line-blanketed code. Our study reveals exceptional stellar parameters: T*∼150,000 K, v=4100 km.s–1, log(L/L)=5.3, and M{dot}=1x10–5 M.yr–1, if we adopt a volume filling factor of 10%. Elemental abundances of C/He∼0.7±0.2 and O/He∼0.15+0.10–0.05 by number qualitatively support previous recombination line studies. We confirm that Sand 2 is more chemically enriched in carbon than LMC WC stars and that it is expected to undergo a supernova explosion within the next 5x104 yr.

Abstract Copyright:

Journal keyword(s): Stars: Evolution - Stars: Individual: Alphanumeric: Sand 2 - Stars: Wolf-Rayet

Simbad objects: 13

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2022.08.12-05:56:16

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