2007ApJ...661L.195B

Query : 2007ApJ...661L.195B

2007ApJ...661L.195B - Astrophys. J., 661, L195-L198 (2007/June-1)

Direct measurement of the radius and density of the transiting exoplanet HD 189733b with the CHARA array.

BAINES E.K., VAN BELLE G.T., TEN BRUMMELAAR T.A., McALISTER H.A., SWAIN M., TURNER N.H., STURMANN L. and STURMANN J.

Abstract (from CDS):

We have measured the angular diameter of the transiting extrasolar planet host star HD 189733 using the CHARA optical/IR interferometric array. Combining our new angular diameter of 0.377±0.024 mas with the Hipparcos parallax leads to a linear radius for the host star of 0.779±0.052 R☉ and a radius for the planet of 1.19±0.08 RJup. Adopting the mass of the planet as derived by its discoverers, we derive a mean density of the planet of 0.91±0.18 g/cm3. This is the first determination of the diameter of an extrasolar planet through purely direct means.

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Journal keyword(s): Infrared: Stars - Stars: Fundamental Parameters - stars: individual (HD 189733) - Techniques: Interferometric

Simbad objects: 4

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Number of rows : 4
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 149026b Pl 16 30 29.6185771608 +38 20 50.308980864           ~ 388 1
2 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1
3 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 991 1
4 * 17 Vul * 20 06 53.4076821840 +23 36 51.929192484   4.891 5.056     B3V 113 0

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