RT Journal Article
T1 The CARMENES search for exoplanets around M dwarfs The warm super-Earths in twin orbits around the mid-type M dwarfs Ross 1020 (GJ 3779) and LP 819-052 (GJ 1265)
A1 Cortés Contreras, Miriam
A1 Díez Alonso, E.
AB We announce the discovery of two planetary companions orbiting around the low-mass stars Ross 1020 (GJ 3779, M4.0V) and LP 819- 052 (GJ 1265, M4.5V). The discovery is based on the analysis of CARMENES radial velocity (RV) observations in the visual channel as part of its survey for exoplanets around M dwarfs. In the case of GJ 1265, CARMENES observations were complemented with publicly available Doppler measurements from HARPS. The datasets reveal two planetary companions, one for each star, that share very similar properties: minimum masses of 8.0 ± 0.5 M⊕ and 7.4 ± 0.5 M⊕ in low-eccentricity orbits with periods of 3.023 ± 0.001 d and 3.651±0.001 d for GJ 3779 b and GJ 1265 b, respectively. The periodic signals around 3 d found in the RV data have no counterpart in any spectral activity indicator. Furthermore, we collected available photometric data for the two host stars, which confirm that the additional Doppler variations found at periods of approximately 95 d can be attributed to the rotation of the stars. The addition of these planets to a mass-period diagram of known planets around M dwarfs suggests a bimodal distribution with a lack of short-period low-mass planets in the range of 2–5 M⊕. It also indicates that super-Earths (>5 M⊕) currently detected by RV and transit techniques around M stars are usually found in systems dominated by a single planet.
PB EDP Science
SN 1432-0746
YR 2018
FD 2018-12-14
LK https://hdl.handle.net/20.500.14352/13112
UL https://hdl.handle.net/20.500.14352/13112
LA eng
NO © ESO 2018. Artículo firmado por 30 autores. CARMENES is an instrument for the Centro Astronómico Hispano-Alemán de Calar Alto (CAHA, Almería, Spain). CARMENES is funded by the German Max-Planck-Gesellschaft (MPG), the Spanish Consejo Superior de Investigaciones Científicas (CSIC), the European Union through FEDER/ERF FICTS-2011-02 funds, and the members of the CARMENES Consortium (Max-Planck-Institut für Astronomie, Instituto de Astrofísica de Andalucía, Landessternwarte Königstuhl, Institut de Ciències de l’Espai, Insitut für Astrophysik Göttingen, Universidad Complutense de Madrid, Thüringer Landessternwarte Tautenburg, Instituto de Astrofísica de Canarias, Hamburger Sternwarte, Centro de Astrobiología and Centro Astronómico Hispano-Alemán), with additional contributions by the Spanish Ministry of Economy, the German Science Foundation through the Major Research Instrumentation Programme and DFG Research Unit FOR2544 “Blue Planets around Red Stars”, the Klaus Tschira Stiftung, the states of Baden-Württemberg and Niedersachsen, and by the Junta de Andalucía. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme(s) 072.C-0488(E) and 183.C-0437(A). R. L. has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 713673 and financial support through the “la Caixa” INPhINIT Fellowship Grant for Doctoral studies at Spanish Research Centres of Excellence, “la Caixa” Banking Foundation, Barcelona, Spain. This work is partly financed by the Spanish Ministry of Economy and Competitiveness through grants ESP2013-48391-C4-2-R, ESP2016-80435-C2-1/2-R, and AYA2016-79425–C3–1/2/3–P.
NO Unión Europea. H2020
NO Ministerio de Economía y Competitividad (MINECO)
NO German Max-Planck-Gesellschaft (MPG)
NO Consejo Superior de Investigaciones Científicas (CSIC)
NO CARMENES Consortium
NO Instituto de Astrofísica de Andalucía
NO Landessternwarte Königstuhl
NO Institut de Ciències de l’Espai
NO Insitut für Astrophysik Göttingen
NO Universidad Complutense de Madrid
NO Thüringer Landessternwarte Tautenburg
NO Instituto de Astrofísica de Canarias
NO Hamburger Sternwarte
NO Centro de Astrobiología and Centro Astronómico Hispano-Alemán
NO German Science Foundation through the Major Research Instrumentation Programme
NO DFG Research Unit FOR2544 “Blue Planets around Red Stars”
NO Klaus Tschira Stiftung
NO the states of Baden-Württemberg and Niedersachsen
NO Junta de Andalucía, Spain
NO European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme(s)
NO Marie Skłodowska-Curie
NO “la Caixa”  for Doctoral studies at Spanish Research Centres of Excellence, Banking Foundation, Barcelona, Spain
NO Spanish Ministry of Economy and Competitiveness
DS Docta Complutense
RD 7 may 2024