2011A&A...530L..10T

Query : 2011A&A...530L..10T

2011A&A...530L..10T - Astronomy and Astrophysics, volume 530L10-10 (2011/6-1)

The VLT-FLAMES Tarantula survey. II. R139 revealed as a massive binary system.

TAYLOR W.D., EVANS C.J., SANA H., WALBORN N.R., DE MINK S.E., STROUD V.E., ALVAREZ-CANDAL A., BARBA R.H., BESTENLEHNER J.M., BONANOS A.Z., BROTT I., CROWTHER P.A., DE KOTER A., FRIEDRICH K., GRAFENER G., HENAULT-BRUNET V., HERRERO A., KAPER L., LANGER N., LENNON D.J., MAIZ-APELLANIZ J., MARKOVA N., MORRELL N., MONACO L. and VINK J.S.

Abstract (from CDS):

We report the discovery that R139 in 30 Doradus is a massive spectroscopic binary system. Multi-epoch optical spectroscopy of R139 was obtained as part of the VLT-FLAMES Tarantula Survey, revealing a double-lined system. The two components are of similar spectral types; the primary exhibits strong C λ4650 emission and is classified as an O6.5Iafc supergiant, while the secondary is an O6Iaf supergiant. The radial-velocity variations indicate a highly eccentric orbit with a period of 153.9 days. Photometry obtained with the Faulkes Telescope South shows no evidence for significant variability within an 18 month period. The orbital solution yields lower mass limits for the components of M1sin3i=78±8M☉ and M2sin3i=66±7M☉. As R139 appears to be the most massive binary system known to contain two evolved of supergiants, it will provide an excellent test for atmospheric and evolutionary models.

Abstract Copyright: ∼

Journal keyword(s): binaries: spectroscopic - stars: early-type - stars: individual: R139 - open clusters and associations: individual: 30 Doradus

CDS comments: Paragraph 3.3 check star Mk 11 not identified.

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 NAME 30 Dor Region reg 05 38.0 -69 06           ~ 261 0
4 RMC 133 SB* 05 38 23.7090122184 -69 05 03.562237032   12.43 12.49     O7/8II 30 0
5 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
6 RMC 138 sg* 05 38 36.1321603320 -69 05 57.971373360   12.07 11.74   11.45 A0Ia 34 0
7 RMC 137 s*b 05 38 36.9624548664 -69 05 07.874900232   12.12 12.02   12.05 B1Ia 33 0
8 RMC 139 WR* 05 38 42.3537501576 -69 04 58.196699796   12.04 11.94     O6.5Iafc+O6Iaf 101 0
9 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
10 HD 269926 WR* 05 38 47.5179121824 -69 00 25.287752196 11.953 12.974 13.116 13.16 12.926 WN4+OB 73 0
11 V* V712 Car EB* 10 23 58.0126366512 -57 45 48.937268268 15.466 15.473 13.5 12.6   O3If*/WN6+O3If*/WN6 176 0
12 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
13 Cl* NGC 3603 BLW A1 WR* 11 15 07.31 -61 15 38.4   12.32 11.18     WN6h 73 0
14 V* V1827 Cyg s*b 20 30 27.3018237840 +41 13 25.130220744     13.053     O6Iaf+O9Ia 42 0
15 BD+40 4220 s*b 20 32 22.4238071594 +41 18 18.942475904 11.32 10.61 9.185     O7Iafep 414 0

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