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

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

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

Full paper

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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 - 2023	#notes
1	NAME Magellanic Clouds	GrG	03 00	-71.0						~	6698	1
2	NAME LMC	G	05 23 34.6	-69 45 22			0.4			~	16757	1
3	NAME 30 Dor Region	reg	05 38.0	-69 06						~	224	0
4	RMC 133	SB*	05 38 23.7090122184	-69 05 03.562237032		12.43	12.49			O7/8II	29	0
5	NAME 30 Dor Nebula	SFR	05 38 36.0	-69 05 11						~	1150	2
6	RMC 138	sg*	05 38 36.1321603320	-69 05 57.971373360		12.07	11.74		11.45	A0Ia	30	0
7	RMC 137	s*b	05 38 36.9624548664	-69 05 07.874900232		12.12	12.02		12.05	B1Ia	30	0
8	RMC 139	WR*	05 38 42.3537501576	-69 04 58.196699796		12.04	11.94			O6.5Iafc+O6Iaf	90	0
9	RMC 136	Cl*	05 38 42.396	-69 06 03.36						~	1937	1
10	HD 269926	WR*	05 38 47.5179121824	-69 00 25.287752196	11.953	12.974	13.116	13.16	12.926	WN4+OB	67	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	164	1
12	Cl* NGC 3603 BLW A1	WR*	11 15 07.31	-61 15 38.4		12.32	11.18			WN6h	67	0
13	NGC 3603	OpC	11 15 10.8	-61 15 32						~	1040	1
14	[CPR2002] B17	s*b	20 30 27.3018237840	+41 13 25.130220744			13.053			O6Iaf+O9Ia	32	0
15	BD+40 4220	s*b	20 32 22.4238071594	+41 18 18.942475904	11.32	10.61	9.185			O7Iafep	390	0

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