ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 01238 (United States)
- Fundación Galileo Galilei-INAF, Rambla José Ana Fernandez Pérez, E-738712 Breña Baja, Tenerife (Spain)
- Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife (Spain)
- Institut d'Astrophysique et Géophysique, Université de Liège, Allée du 6 Août 17, B-4000 Liège (Belgium)
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, 2131 Tech Drive, Evanston, IL 60208 (United States)
- Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, Sauverny, CH-1290 (Switzerland)
- Université de Bordeaux, LAB, UMR 5804, BP F-33270 Floirac (France)
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{sup –1} (3σ) and confine the stellar v sin i {sub *} to 0.2 ± 0.5 km s{sup –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.
- OSTI ID:
- 22365082
- Journal Information:
- Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 792; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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