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Title: ROSSITER-MCLAUGHLIN OBSERVATIONS OF 55 Cnc e

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.
Authors:
; ; ; ;  [1] ;  [2] ;  [3] ; ;  [4] ;  [5] ;  [6] ; ; ; ; ;  [7] ;  [8] ;  [9]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 01238 (United States)
  2. Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)
  3. Fundación Galileo Galilei-INAF, Rambla José Ana Fernandez Pérez, E-738712 Breña Baja, Tenerife (Spain)
  4. Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife (Spain)
  5. Institut d'Astrophysique et Géophysique, Université de Liège, Allée du 6 Août 17, B-4000 Liège (Belgium)
  6. 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)
  7. Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, Sauverny, CH-1290 (Switzerland)
  8. Université de Bordeaux, LAB, UMR 5804, BP F-33270 Floirac (France)
  9. Department of Physics and Astronomy, University College London, Gower Street, WC1E6BT (United Kingdom)
Publication Date:
OSTI Identifier:
22365082
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 792; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; ASTROPHYSICS; ORBITS; PLANETS; RADIAL VELOCITY; SATELLITES; SIGNALS; SPIN; STARS