期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 792, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/792/2/L31
关键词
planets and satellites: formation; planets and satellites: individual (55 Cancri e); stars: individual (55 Cancri); techniques: radial velocities; techniques: spectroscopic
资金
- John Templeton Foundation
- European Union Seventh Framework Programme (FP7) [313014]
- Swiss National Science Foundation [P300P2-147773]
- Alexander-von-Humboldt postdoctoral fellowship program
- Swiss National Science Foundation (SNSF)
- Spanish Ministry of Economy and Competitiveness [SEV-20110187]
- STFC [ST/K001612/1] Funding Source: UKRI
- Swiss National Science Foundation (SNF) [P300P2_147773] Funding Source: Swiss National Science Foundation (SNF)
- Science and Technology Facilities Council [ST/K001612/1] Funding Source: researchfish
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) (3 sigma) 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.
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