Bibcode
Suárez Mascareño, A.; González Hernández, J. I.; Rebolo, R.; Velasco, S.; Toledo-Padrón, B.; Affer, L.; Perger, M.; Micela, G.; Ribas, I.; Maldonado, J.; Leto, G.; Zanmar Sanchez, R.; Scandariato, G.; Damasso, M.; Sozzetti, A.; Esposito, M.; Covino, E.; Maggio, A.; Lanza, A. F.; Desidera, S.; Rosich, A.; Bignamini, A.; Claudi, R.; Benatti, S.; Borsa, F.; Pedani, M.; Molinari, E.; Morales, J. C.; Herrero, E.; Lafarga, M.
Bibliographical reference
Astronomy and Astrophysics, Volume 605, id.A92, 15 pp.
Advertised on:
9
2017
Journal
Citations
29
Refereed citations
28
Description
We report the discovery of a super-Earth orbiting at the inner edge of
the habitable zone of the star GJ 625 based on the analysis of the
radial-velocity (RV) time series from the HARPS-N spectrograph,
consisting of 151 HARPS-N measurements taken over 3.5 yr. GJ 625 b is a
planet with a minimum mass Msini of 2.82 ± 0.51
M⊕ with an orbital period of 14.628 ± 0.013 days
at a distance of 0.078 AU from its parent star. The host star is the
quiet M2 V star GJ 625, located at 6.5 pc from the Sun. We find the
presence of a second radial-velocity signal in the range 74-85 days that
we relate to stellar rotation after analysing the time series of Ca II
H&K and Hα spectroscopic indicators, the variations of the
FWHM of the CCF, and the APT2 photometric light curves. We find no
evidence linking the short-period radial-velocity signal to any activity
proxy.
Based on observations made with the Italian Telescopio Nazionale Galileo
(TNG), operated on the island of La Palma by the INAF - Fundación
Galileo Galilei at the Roche de Los Muchachos Observatory of the
Instituto de Astrofísica de Canarias (IAC); photometric
observations made with the robotic telescope APT2 (within the EXORAP
programme) located at Serra La Nave on Mt. Etna; and lucky imaging
observations made with the Telescopio Carlos Sánchez operated on
the island of Tenerife by the Instituto de Astrofísica de
Canarias in the Spanish Observatorio del Teide.Tables A.1-A.5 are only
available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/605/A92