SIMBAD references

2011A&A...527L..11H - Astronomy and Astrophysics, volume 527, L11-11 (2011/3-1)

The retrograde orbit of the HAT-P-6b exoplanet.

HEBRARD G., EHRENREICH D., BOUCHY F., DELFOSSE X., MOUTOU C., ARNOLD L., BOISSE I., BONFILS X., DIAZ R.F., EGGENBERGER A., FORVEILLE T., LAGRANGE A.-M., LOVIS C., PEPE F., PERRIER C., QUELOZ D., SANTERNE A., SANTOS N.C., SEGRANSAN D., UDRY S. and VIDAL-MADJAR A.

Abstract (from CDS):

We observed the transit of the HAT-P-6b exoplanet across its host star with the SOPHIE spectrograph (OHP, France). The resulting stellar radial velocities display the Rossiter-McLaughlin anomaly and reveal a retrograde orbit: the planetary orbital spin and the stellar rotational spin point in approximately opposite directions. A fit to the anomaly measures a sky-projected angle λ=166°±10° between these two spin axes. All seven known retrograde planets are hot Jupiters with masses Mp<3MJup. About two thirds of the planets in this mass range, however, are prograde and aligned (λ≃0°). In contrast, most of the more massive planets (Mp>4MJup) are prograde but misaligned. Different mechanisms may therefore be responsible for planetary obliquities above and below ∼3.5MJup.

Abstract Copyright: ∼

Journal keyword(s): planets and satellites: dynamical evolution and stability - techniques: radial velocities - planetary systems - stars: individual: HAT-P-6

VizieR on-line data: <Available at CDS (J/A+A/527/L11): hat6.dat>

Simbad objects: 30

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