ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e
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Lopez-Morales-2014-ROSSITER-MCLAUGHLIN.pdf
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Author(s)
Lopez-Morales, Mercedes
Triaud, Amaury
Rodler, Florian
Dumusque, Xavier
Buchhave, Lars A.
Harutyunyan, Avet
Hoyer, Sergio
Alonso, Roi
Gillon, M.
Kaib, Nathan A.
Date Issued
August 2014
Journal
Astrophysical Journal
Publisher
Institute of Physics/American Astronomical Society
Citation
López-Morales, Mercedes, Amaury H. M. J. Triaud, Florian Rodler, Xavier Dumusque, Lars A. Buchhave, Avet Harutyunyan, Sergio Hoyer, et al. “ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e.” The Astrophysical Journal 792, no. 2 (August 25, 2014): L31. © 2014 American Astronomical Society.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1088/2041-8205/792/2/l31
