2011A&A...526L...4B

Query : 2011A&A...526L...4B

2011A&A...526L...4B - Astronomy and Astrophysics, volume 526, L4-4 (2011/2-1)

The radius and mass of the close solar twin 18 Scorpii derived from asteroseismology and interferometry.

BAZOT M., IRELAND M.J., HUBER D., BEDDING T.R., BROOMHALL A.-M., CAMPANTE T.L., CARFANTAN H., CHAPLIN W.J., ELSWORTH Y., MELENDEZ J., PETIT P., THEADO S., VAN GROOTEL V., ARENTOFT T., ASPLUND M., CASTRO M., CHRISTENSEN-DALSGAARD J., DO NASCIMENTO J.D.Jr, DINTRANS B., DUMUSQUE X., KJELDSEN H., McALISTER H.A., METCALFE T.S., MONTEIRO M.J.P.F.G., SANTOS N.C., SOUSA S., STURMANN J., STURMANN L., TEN BRUMMELAAR T.A., TURNER N. and VAUCLAIR S.

Abstract (from CDS):

The growing interest in solar twins is motivated by the possibility of comparing them directly to the Sun. To carry on this kind of analysis, we need to know their physical characteristics with precision. Our first objective is to use asteroseismology and interferometry on the brightest of them: 18 Sco. We observed the star during 12 nights with HARPS for seismology and used the PAVO beam-combiner at CHARA for interferometry. An average large frequency separation 134.4±0.3µHz and angular and linear radiuses of 0.6759 ±0.0062mas and 1.010±0.009R☉ were estimated. We used these values to derive the mass of the star, 1.02±0.03M☉.

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Journal keyword(s): stars: individual: 18 Sco - stars: oscillations - techniques: radial velocities - techniques: interferometric - methods: data analysis

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 592 0
2 * 16 Sco * 16 12 07.3159602096 -08 32 51.286538400   5.545 5.424     A2IV 50 0
3 HD 145788 * 16 12 56.5863101760 -04 13 14.831850036   6.367 6.255     A0V 59 0
4 * 18 Sco PM* 16 15 37.2702755653 -08 22 09.982125430   6.15 5.50     G2Va 604 0
5 HD 147550 * 16 22 38.9052134400 -02 04 47.519268672   6.288 6.241     B9V 114 0

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