Bibcode
López-Morales, M.; Triaud, Amaury H. M. J.; Rodler, Florian; Dumusque, Xavier; Buchhave, Lars A.; Harutyunyan, Avet; Hoyer, S.; Alonso, R.; Gillon, Michaël; Kaib, Nathan A.; Latham, David. W.; Lovis, Christophe; Pepe, Francesco; Queloz, Didier; Raymond, Sean N.; Ségransan, Damien; Waldmann, Ingo P.; Udry, Stéphane
Bibliographical reference
The Astrophysical Journal Letters, Volume 792, Issue 2, article id. L31, 6 pp. (2014).
Advertised on:
9
2014
Citations
36
Refereed citations
32
Description
We present Rossiter-McLaughlin observations of the transiting
super-Earth 55 Cnc e collected during six transit events between 2012
January and 2013 November with HARPS and HARPS-N. We detect no radial
velocity signal above 35 cm s–1 (3σ) and confine
the stellar v sin i sstarf to 0.2 ± 0.5 km
s–1. 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.
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