2000MNRAS.314...23W


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET23:03:12

2000MNRAS.314...23W - Mon. Not. R. Astron. Soc., 314, 23-32 (2000/May-1)

Spectroscopy of WC9 Wolf-Rayet stars: a search for companions.

WILLIAMS P.M. and VAN DER HUCHT K.A.

Abstract (from CDS):

A spectroscopic search for luminous companions to WC9-type Wolf-Rayet stars making circumstellar dust reveals the presence of absorption lines attributable to companions in the blue spectra of WR69 (HD136488) and WR104 (Ve2-45). Comparison of spectra of WR104 observed in 1995 and 1997 showed the absorption lines to be more conspicuous in the latter observation and the emission lines weaker, suggesting a selective eclipse of the WC9 star similar to that observed by Crowther in 1996. The WC9 emission-line spectra are shown to be less uniform than previously thought, showing a significant range of Oii line strengths. The only two WC9 stars in the observed sample that do not make circumstellar dust, WR81 (He3-1316) and WR92 (HD 157451), are found to have anomalously weak Oii and strong Heii lines. We suggest that these spectroscopic differences may reflect a compositional difference that plays a role in determining which of the WC9 stars make dust.

Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): stars: fundamental parameters - stars: individual: WR104 - stars: Wolf-Rayet

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 WR 19 WR* 10 18 04.9886804992 -58 16 26.241795620   14.80 13.85     WC5+O9 56 0
2 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 263 0
3 HD 108925 * 12 31 16.7192755816 -57 04 52.786384504   6.58 6.45     A3V 38 0
4 HD 117297 WR* 13 30 53.2511996037 -62 04 51.856386987 10.81 11.10 10.90 10.70   WC8 85 0
5 HD 136488 WR* 15 24 11.3111665819 -62 40 37.575311536 9.15 9.514 9.10 9.71   WC9d+OB? 110 0
6 HD 137603 WR* 15 29 44.6908093554 -58 34 51.248928169 10.98 10.95 9.71 9.78   WC9+OB 103 0
7 MR 66 WR* 17 02 40.3825863866 -45 59 15.455194984   13.62 12.07 11.77   WC9 59 0
8 CPD-33 4347 WR* 17 18 49.7246525731 -33 57 41.389875461   13.93 12.56 12.21   WN8/WC9 61 0
9 HD 157451 WR* 17 25 23.2779746024 -43 29 31.469615959 10 10.59 10.20 10.46   WC9 79 0
10 MR 74 WR* 17 36 19.8953384759 -33 26 12.274561705 16.01 14.87 13.18 12.99   WC9 82 1
11 Cl Trumpler 27 OpC 17 36 20 -33 31.0   8.24 6.7     ~ 90 1
12 WRAY 15-1736 WR* 17 36 24.4547143641 -32 54 31.435866769   15.12 13.58 13.30 11.27 WC9 39 0
13 WR 98a WR* 17 41 13.0431655551 -30 32 30.425152324   18.40   15.20 13.82 WC8/9 87 1
14 HD 164270 WR* 18 01 43.1452971756 -32 42 55.161881733 8.52 8.97 8.74 9.51   WC9d+? 209 0
15 MR 80 WR* 18 02 04.1238716757 -23 37 42.144766363   14.85       WC9 205 2
16 HD 313643 WR* 18 04 43.6647304100 -21 09 30.557213987 13.58 13.27 12.02 11.67   WC9d 87 0
17 HD 168206 WR* 18 19 07.3628284656 -11 37 59.165038875 9.65 9.88 9.10     WC8+O8/9III/V 277 1
18 THA 20-1 WR* 18 39 17.9036019736 -10 05 30.898511525   13.07 12.43     WC9d 50 0
19 EM* AS 320 WR* 18 44 13.1527220304 -03 47 57.779718279 13.7 13.340 13.983     WC9d 110 0
20 MR 93 WR* 19 28 15.6144084163 +19 33 21.527872339   14.83       WC7+O9(III) 100 0
21 HD 192641 WR* 20 14 31.7667382048 +36 39 39.597237795 7.80 8.20 7.91     WC7+O9 302 0
22 HD 193793 WR* 20 20 27.9763345925 +43 51 16.289775091 6.90 7.25 6.85 4.58   WC7p+O5 645 1

    Equat.    Gal    SGal    Ecl

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2020.02.17-23:03:12

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