2000ApJ...538L..51C


Query : 2000ApJ...538L..51C

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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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10362 1
2 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1175 2
3 [AM85] IC 1613 6 WR* 01 05 01.6177966440 +02 04 19.938198792     20.7     WO3 21 1
4 LIN 547 WR* 01 31 04.1367366432 -73 25 03.784411524   12.75 12.90     WO4+O4V 92 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16244 1
6 Brey 93 WR* 05 39 34.3017622440 -68 44 09.155562972 14.291 15.626 15.204   15.620 WO3 64 0
7 * mu. Col V* 05 45 59.8950238944 -32 18 23.162261796 3.84 4.90 5.18 5.30 5.57 O9.5V 475 0
8 * nu. Dor PM* 06 08 44.2619933 -68 50 36.279685   4.975 5.038     B8V 75 0
9 HD 60753 * 07 33 27.3186651576 -50 35 03.315962580 6.02 6.587 6.680     B3IV 77 0
10 [MS70] 4 WR* 10 51 38.9063499504 -60 56 34.909328328 13.57 13.80 12.78 12.56   WO4+O5III/V((f)) 50 0
11 Sand 2 * 12 02 49.7231459664 +28 51 23.162730336   17.25 15.80     M3: 10 0
12 V* V3893 Sgr WR* 17 45 47.5405102320 -26 10 26.779355616   15.13 14.20 14.23   WR 113 1
13 WR 142 WR* 20 21 44.3438785440 +37 22 30.544989960   14.39 12.99 12.73 11.04 WO2 126 0

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2022.09.26-13:44:44

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