2007MNRAS.380.1276N

Query : 2007MNRAS.380.1276N

2007MNRAS.380.1276N - Mon. Not. R. Astron. Soc., 380, 1276-1284 (2007/September-3)

Orbital solution and fundamental parameters of σ Scorpii.

NORTH J.R., DAVIS J., TUTHILL P.G., TANGO W.J. and ROBERTSON J.G.

Abstract (from CDS):

The first orbital solution for the spectroscopic pair in the multiple star system σ Scorpii, determined from measurements with the Sydney University Stellar Interferometer, is presented. The primary component is of β Cephei variable type and has been one of the most intensively studied examples of its class. The orbital solution, when combined with radial velocity results found in the literature, yields a distance of 174+23–18pc, which is consistent with, but more accurate than the Hipparcos value. For the primary component we determine 18.4±5.4M☉, -4.12±0.34 mag and 12.7±1.8R☉ for the mass, absolute visual magnitude and radius, respectively. A B1 dwarf spectral type and luminosity class for the secondary is proposed from the mass determination of 11.9±3.1M☉ and the estimated system age of 10Myr.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): techniques: interferometric - binaries: spectroscopic - stars: fundamental parameters - stars: individual: σ Sco - stars: variables: other

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 HD 92024 Pu* 10 36 08.3339354160 -58 13 04.358647920 8.11 8.90 9.00 9.63 8.94 B1III 71 0
2 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
3 * alf Vir bC* 13 25 11.57937 -11 09 40.7501 -0.20 0.74 0.97 1.06 1.30 B1V 877 1
4 * bet Cen bC* 14 03 49.40535 -60 22 22.9266     0.58     B1III 371 0
5 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
6 * rho Sco SB* 15 56 53.0772000457 -29 12 50.667996815 2.84 3.66 3.86 3.97 4.17 B2IV-V 221 0
7 * ome Sco bC* 16 06 48.4249866846 -20 40 09.079866331 3.10 3.92 3.97 3.91 3.99 B1V 492 0
8 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
9 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
10 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 898 0
11 * ome Oph a2* 16 32 08.2003815598 -21 27 59.052127058 4.69 4.56 4.45 4.32 4.30 ApSrEuCr 167 0
12 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0V 959 0
13 * lam Sco bC* 17 33 36.52012 -37 06 13.7648 0.52 1.49 1.63     B2IV+DA7.9 404 0
14 V* BW Vul bC* 20 54 22.3947588600 +28 31 19.190976132 5.47 6.40 6.54     B2IIIv 301 0
15 * 12 Lac bC* 22 41 28.6495065456 +40 13 31.609736580 4.24 5.080 5.229     B1.5III 369 0

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