2015ApJ...812L..11S

Query : 2015ApJ...812L..11S

2015ApJ...812L..11S - Astrophys. J., 812, L11 (2015/October-2)

A low stellar obliquity for WASP-47, a compact multiplanet system with a hot Jupiter and an ultra-short period planet.

SANCHIS-OJEDA R., WINN J.N., DAI F., HOWARD A.W., ISAACSON H., MARCY G.W., PETIGURA E., SINUKOFF E., WEISS L., ALBRECHT S., HIRANO T. and ROGERS L.

Abstract (from CDS):

We have detected the Rossiter-Mclaughlin effect during a transit of WASP-47b, the only known hot Jupiter with close planetary companions. By combining our spectroscopic observations with Kepler photometry, we show that the projected stellar obliquity is λ = 0°±24°. We can firmly exclude a retrograde orbit for WASP-47b, and rule out strongly misaligned prograde orbits. Low obliquities have also been found for most of the other compact multiplanet systems that have been investigated. The Kepler-56 system, with two close-in gas giants transiting their subgiant host star with an obliquity of at least 45°, remains the only clear counterexample.

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Journal keyword(s): planet-star interactions - planetary systems - planets and satellites: formation - stars: rotation

Simbad objects: 12

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Number of rows : 12
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 * rho01 Cnc PM* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1223 1
2 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 682 1
3 Kepler-30 Er* 19 01 08.0746104528 +38 56 50.218268856   16.50   15.767 14.55 ~ 180 1
4 Kepler-25 Er* 19 06 33.2141354736 +39 29 16.358725104   11.337 10.623 10.622   F6 192 1
5 Kepler-50 Er* 19 12 24.2128368312 +50 02 01.374741852   11.02 10.54 10.387   F5 131 1
6 BD+40 3638 Er* 19 14 45.2915908224 +41 09 04.210237980   11.643 11.115 11.009   F6IV 159 1
7 Kepler-56 RG* 19 35 02.0011980936 +41 52 18.692360400   13.954 12.756 12.379   ~ 210 1
8 Kepler-487 Ro* 19 41 08.9282369832 +41 13 19.055345232   15.89 14.84 15.60 14.39 ~ 87 1
9 Kepler-89 Ro* 19 49 19.9343204784 +41 53 28.006017936           ~ 175 1
10 Kepler-18 Er* 19 52 19.0688312520 +44 44 46.807928916   14.750 13.767 13.93   ~ 146 1
11 WASP-47b Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 116 1
12 WASP-47 * 22 04 48.7261549272 -12 01 07.998743676     11.99 11.82   ~ 217 1

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