Article (Scientific journals)
Rossiter-McLaughlin Observations of 55 Cnc e
Lopez-Morales, Mercedes; Triaud, Amaury H. M. J.; Rodler, Florian et al.
2014In Astrophysical Journal. Letters, sous presse
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Keywords :
Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We present Rossiter-McLaughlin observations of the transiting super-Earth 55 Cnc e collected during six transit events between January 2012 and November 2013 with HARPS and HARPS-N. We detect no radial-velocity signal above 35 cm/s (3-sigma) and confine the stellar v sin i to 0.2 +/- 0.5 km/s. 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Lopez-Morales, Mercedes
Triaud, Amaury H. M. J.
Rodler, Florian
Dumusque, Xavier
Buchhave, Lars A.
Harutyunyan, A.
Hoyer, Sergio
Alonso, Roi
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Kaib, Nathan A.
Latham, David W.
Lovis, Christophe
Pepe, Francesco
Queloz, Didier
Raymond, Sean N.
Segransan, Damien
Waldmann, Ingo P.
Udry, Stephane
More authors (8 more) Less
Language :
English
Title :
Rossiter-McLaughlin Observations of 55 Cnc e
Publication date :
2014
Journal title :
Astrophysical Journal. Letters
ISSN :
2041-8205
eISSN :
2041-8213
Publisher :
IOP Publishing, Bristol, United Kingdom
Volume :
sous presse
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Accepted for publication in ApJ Letters
Available on ORBi :
since 22 August 2014

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