SIMBAD references

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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