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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 710155.0, MPI für Astronomie / Publikationen_mpia
Rossiter-McLaughlin observations of 55 Cnc e
Authors:López-Morales, M.; Triaud, A. H. M. J.; Rodler, F.; Dumusque, X.; Buchhave, L. A.; Harutyunyan, A.; Hoyer, S.; Alonso, R.; Gillon, M.; Kaib, N. A.; Latham, D. W.; Lovis, C.; Pepe, F.; Queloz, D.; Raymond, S. N.; Ségransan, D.; Waldmann, I. P.; Udry, S.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:The Astrophysical Journal Letters
Issue / Number:2
Start Page:id. L31 (6 pp)
Audience:Not Specified
Abstract / 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 (3sigma) 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.
Free Keywords:planets and satellites: formation; planets and satellites: individual: 55 Cancri e; stars: individual: 55 Cancri; techniques: radial velocities; techniques: spectroscopic
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X %R 10.1088/2041-8205/792/2/L31
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