2008ApJ...686..649J

Query : 2008ApJ...686..649J

2008ApJ...686..649J - Astrophys. J., 686, 649-657 (2008/October-2)

Measurement of the spin-orbit angle of exoplanet HAT-P-1b.

JOHNSON J.A., WINN J.N., NARITA N., ENYA K., WILLIAMS P.K.G., MARCY G.W., SATO B., OHTA Y., TARUYA A., SUTO Y., TURNER E.L., BAKOS G., BUTLER R.P., VOGT S.S., AOKI W., TAMURA M., YAMADA T., YOSHII Y. and HIDAS M.

Abstract (from CDS):

We present new spectroscopic and photometric observations of the HAT-P-1 planetary system. Spectra obtained during three transits exhibit the Rossiter-McLaughlin effect, allowing us to measure the angle between the sky projections of the stellar spin axis and orbit normal, λ=3.7°±2.1°. The small value of λ for this and other systems suggests that the dominant planet migration mechanism preserves spin-orbit alignment. Using two new transit light curves, we refine the transit ephemeris and reduce the uncertainty in the orbital period by an order of magnitude. We find a upper limit on the orbital eccentricity of 0.067, with 99% confidence, by combining our new radial velocity measurements with those obtained previously.

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Journal keyword(s): Stars: Planetary Systems: Formation - stars: individual (ADS 16402A) - stars: individual (HAT-P-1) - Techniques: Radial Velocities

Simbad objects: 11

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Number of rows : 11
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 HD 17156b Pl 02 49 44.4871034544 +71 45 11.629235988           ~ 184 1
2 HD 17156 PM* 02 49 44.4871034544 +71 45 11.629235988   8.78 8.16     F9V 174 2
3 * lam Aur PM* 05 19 08.4754499121 +40 05 56.585080940 5.46 5.33 4.71 4.18 3.86 G1.5IV-VFe-1 533 0
4 BD+28 2507 V* 16 02 11.8462322592 +28 10 10.420201452   11.88 11.25     G1V 104 1
5 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 174 2
6 NAME V672 Lyr b Pl 19 04 09.8515616256 +36 37 57.446680296           ~ 339 1
7 Kepler-1b Pl 19 07 14.0375836512 +49 18 59.091482160           ~ 330 2
8 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 897 1
9 BD+37 4734A EB* 22 57 45.9211330656 +38 40 27.199869600   10.29 9.75     F8 19 0
10 NAME BD+37 4734Bb Pl 22 57 46.8442481880 +38 40 30.358351704           ~ 247 1
11 BD+37 4734B PM* 22 57 46.8442481880 +38 40 30.358351704   10.82 9.87     G0V 169 1

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