ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e

ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e

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 [subscript *] to 0.2 ± 0.5 km...

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Bibliographic Details
Main Authors: Lopez-Morales, Mercedes, Triaud, Amaury, Rodler, Florian, Dumusque, Xavier, Buchhave, Lars A., Harutyunyan, Avet, Hoyer, Sergio, Alonso, Roi, Gillon, M., Kaib, Nathan A., Latham, David W., Lovis, Christophe, Pepe, Francesco, Queloz, Didier, Raymond, Sean N., Ségransan, Damien, Waldmann, Ingo P., Udry, Stéphane
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: Institute of Physics/American Astronomical Society 2015
Online Access:http://hdl.handle.net/1721.1/93251
https://orcid.org/0000-0002-5510-8751
Description
Summary: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 [subscript *] 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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