LOPEZ-MORALES, Mercedes; TRIAUD, Amaury H. M. J.; RODLER, Florian; DUMUSQUE, Xavier; BUCHHAVE, Lars A.; HARUTYUNYAN, A.; HOYER, Sergio; ALONSO, Roi; GILLON, Michael; KAIB, Nathan A.; LATHAM, David W.; LOVIS, Christophe; PEPE, Francesco; QUELOZ, Didier; RAYMOND, Sean N.; SEGRANSAN, Damien; WALDMANN, Ingo P.; UDRY, Stephane

doi:10.1088/2041-8205/792/2/L31

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LOPEZ-MORALES, Mercedes

TRIAUD, Amaury H. M. J.

RODLER, Florian

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The Astrophysical journal letters. 2014, vol. 792, n° 2, p. id. L31

Bristol : IOP Publishing

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We present Rossiter-McLaughlin observations of the transiting super-Earth 55 Cnc e collected during six transit events between January 2012 and November 2013 with HARPS and HARPS-N. We detect no radial-velocity signal above 35 cm/s (3-sigma) and confine the stellar v sin i to 0.2 +/- 0.5 km/s. The star appears to be a very slow rotator, producing a very low amplitude Rossiter-McLaughlin effect. Given such a low amplitude, the Rossiter-McLaughlin effect of 55 Cnc e is undetected in our data, and any spin-orbit angle of the system remains possible. We also performed Doppler tomography and reach a similar conclusion. Our results offer a glimpse of the capacity of future instrumentation to study low amplitude Rossiter-McLaughlin effects produced by super-Earths.< Réduire

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Rossiter-McLaughlin Observations of 55 Cnc e

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