Rossiter-McLaughlin observations of 55 Cnc e
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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 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.
Original language | English |
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Article number | L31 |
Journal | The Astrophysical Journal Letters |
Volume | 792 |
Issue number | 2 |
ISSN | 2041-8205 |
DOIs | |
Publication status | Published - 2014 |
ID: 139969380