1999AJ....117.1433C


Query : 1999AJ....117.1433C

1999AJ....117.1433C - Astron. J., 117, 1433-1440 (1999/March-0)

Physical structure of small Wolf-Rayet ring nebulae.

CHU Y.-H., WEIS K. and GARNETT D.R.

Abstract (from CDS):

We have selected the seven most well-defined Wolf-Rayet (WR) ring nebulae in the Large Magellanic Cloud (LMC), Br 2, 10, 13, 40a, 48, 52, and 100, to study their physical nature and evolutionary stages. New CCD imaging and echelle observations have been obtained for five of these nebulae; previous photographic imaging and echelle observations are available for the remaining two nebulae. Using the nebular dynamics and abundances, we find that the Br 13 nebula is a circumstellar bubble, and that the Br 2 nebula may represent a circumstellar bubble merging with a fossil main-sequence interstellar bubble. The nebulae around Br 10, 52, and 100 all show influence of the ambient interstellar medium. Their regular expansion patterns suggest that they still contain significant amounts of circumstellar material. Their nebular abundances would be extremely interesting, as their central stars are WC5 and WN3-WN4 stars whose nebular abundances have not been derived previously. Intriguing and tantalizing implications are obtained from comparisons of the LMC WR ring nebulae with ring nebulae around Galactic WR stars, Galactic LBVs, LMC LBVs, and LMC BSGs; however, these implications may be limited by small-number statistics. A SNR candidate close to Br 2 is diagnosed by its large expansion velocity and nonthermal radio emission. There is no indication that Br 2's ring nebula interacts dynamically with this SNR candidate.

Abstract Copyright:

Journal keyword(s): ISM: Bubbles - ISM: Kinematics and Dynamics - Galaxies: Magellanic Clouds - Stars: Mass Loss - Stars: Wolf-Rayet

Simbad objects: 33

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Number of rows : 33
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 LHA 115-N 19 HII 00 48 06 -73 08.7           ~ 63 0
2 HD 17638 WR* 02 52 11.6613087600 +56 56 07.131052500 10.99 10.86 10.41     WC6 116 0
3 Brey 2 WR* 04 49 36.2527075920 -69 20 54.744608760 15.633 16.495 16.579   16.447 WN2b(h) 34 0
4 LHA 120-N 79 HII 04 52 00 -69 22.5           ~ 59 1
5 HD 32402 WR* 04 57 24.0820685472 -68 23 57.120838692   12.53 12.69 13.24   WC 75 0
6 NGC 1770 HII 04 58 29.7 -68 27 02           ~ 50 1
7 HD 33133 WR* 05 03 08.9126630616 -66 40 57.492259824   12.46 12.63 12.85   WN7h 89 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16242 1
9 Brey 40a WR* 05 29 33.2070992328 -70 59 34.838770092 12.472 13.20 13.39 13.90 13.743 WN4:b+O8V 40 0
10 NGC 2018 As* 05 31 24.00 -71 04 24.0   10.91 10.89     ~ 103 1
11 HD 269748 WR* 05 33 10.5705227928 -67 42 43.053720228 12.093 13.054 13.186   12.828 WN4b+O8: 48 0
12 NGC 2020 EmO 05 33 10.6 -67 42 45           ~ 34 0
13 Brey 52 WR* 05 34 52.0245405048 -67 21 28.974967020 13.624 14.451 14.597 14.84 14.719 WN4ha: 41 0
14 DEM L 240 HII 05 34 53.1 -67 21 24           ~ 15 0
15 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4737 2
16 HD 269858 s*b 05 36 43.6936418088 -69 29 47.451149232   10.24 10.15 9.95 9.05 LBV 277 2
17 SK -69 279 Em* 05 41 44.6553703752 -69 35 14.905767516 12.079 12.787 12.842 13.03 12.619 OB 48 0
18 DEM L 315 HII 05 46 38.8 -67 10 39           ~ 12 0
19 HD 270149 WR* 05 46 46.3470746448 -67 09 58.269315024 14.025 14.20 14.48 14.76 14.524 WN4b 51 0
20 HD 50896 WR* 06 54 13.0439608392 -23 55 42.023319852 5.74 6.63 6.91 7.74   WN4b 756 0
21 HD 56925 WR* 07 18 29.1311435688 -13 13 01.513932528 11.21 11.74 11.56 11.40   WN4b 165 0
22 NGC 2359 HII 07 18 30.000 -13 13 36.00           ~ 163 0
23 HD 89358 WR* 10 17 02.2743231360 -57 54 46.875258324 11.1 11.19 10.83 10.59   WN4-s 167 1
24 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 320 0
25 WRAY 15-682 WR* 10 53 59.5777329720 -60 26 44.361095316   11.64 10.85 10.56   WN11h 143 3
26 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 614 0
27 HD 96548 WR* 11 06 17.2032351624 -65 30 35.241182028 7.10 7.80 7.70 8.49   WN8h 403 0
28 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B6Iap 268 2
29 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 815 2
30 Hen 2-427 WR* 19 11 30.8749167768 +16 51 38.200938264   12.19 11.50     WN8h 328 0
31 HD 192163 WR* 20 12 06.5418877464 +38 21 17.784181008 7.12 7.49 7.50     WN6(h)-s 533 0
32 NGC 6888 ISM 20 12 07 +38 21.3   7.44       WN6b(h) 265 1
33 LBN 087.23-03.80 HII 21 18.5 +43 56           ~ 41 0

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2022.09.26-08:20:19

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