2006ApJ...653L..69W

Query : 2006ApJ...653L..69W

2006ApJ...653L..69W - Astrophys. J., 653, L69-L72 (2006/December-2)

Measurement of the spin-orbit alignment in the exoplanetary system HD 189733.

WINN J.N., JOHNSON J.A., MARCY G.W., BUTLER R.P., VOGT S.S., HENRY G.W., ROUSSANOVA A., HOLMAN M.J., ENYA K., NARITA N., SUTO Y. and TURNER E.L.

Abstract (from CDS):

We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface), we find the angle between the sky projections of the stellar spin axis and orbit normal to be λ=-1°.4±1°.1. This is the third case of a ``hot Jupiter'' for which λ has been measured. In all three cases λ is small, ruling out random orientations with 99.96% confidence, and suggesting that the inward migration of hot Jupiters generally preserves spin-orbit alignment.

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Journal keyword(s): Stars: Planetary Systems - Stars: Planetary Systems: Formation - stars: individual (HD 189733) - Stars: Rotation

Simbad objects: 6

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Number of rows : 6
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 3561 PM* 00 38 18.8847646488 -32 39 27.517753764   10.59 9.96     G3V 18 0
2 HD 3765 PM* 00 40 49.2698857963 +40 11 13.823048636   8.30   6.8   K2V 281 0
3 HD 149026 PM* 16 30 29.6185771608 +38 20 50.308980864   8.75 8.14     G0IV 267 1
4 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1
5 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 991 1
6 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1193 1

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