| Issue |
A&A
Volume 618, October 2018
|
|
|---|---|---|
| Article Number | A103 | |
| Number of page(s) | 15 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361/201832732 | |
| Published online | 17 October 2018 | |
The SOPHIE search for northern extrasolar planets★,★★
XIII. Two planets around M-dwarfs Gl617A and Gl96
1
Laboratoire d’Astrophysique de Marseille, UMR 7326, CNRS, Aix-Marseille Université,
13388 Marseille Cedex 13, France
e-mail: melissa.hobson@lam.fr
2
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires,
Buenos Aires, Argentina
3
Instituto de Astronomía y Física del Espacio (IAFE), CONICET – Universidad de Buenos Aires, Buenos Aires, Argentina
4
CNRS, IPAG, Université Grenoble Alpes,
38000 Grenoble, France
5
Departamento de Astronomía, Universidad de Concepción,
Casilla 160-C,
Concepción, Chile
6
Observatoire Astronomique de lUniversité de Gen,
51 Chemin des Maillettes,
1290 Versoix, Switzerland
7
ASD/IMCCE,
CNRS-UMR8028,
Observatoire de Paris, PSL, UPMC,
77 Avenue Denfert-Rochereau,
75014 Paris,
France
8
Observatoire de Haute-Provence, CNRS, Institut Pythéas UMS 3470, Aix-Marseille Université,
04870 Saint-Michel-lObservatoire, France
9
Institut dAstrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Boulevard Arago,
75014 Paris, France
10
Instituto de Astrofísica e Ciências do Espaço, CAUP, Universidade do Porto, Rua das Estrelas,
4150-762 Porto, Portugal
11
Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre,
4169-007 Porto, Portugal
12
Canada-France-Hawaii Telescope Corporation,
65-1238 Mamalahoa Hwy,
Kamuela,
HI 96743, USA
13
Leiden Observatory, Leiden University,
Postbus 9513,
2300 RA Leiden, The Netherlands
Received:
30
January
2018
Accepted:
27
June
2018
We report the detection of two exoplanets and a further tentative candidate around the M-dwarf stars Gl96 and Gl617A, based on radial velocity measurements obtained with the SOPHIE spectrograph at the Observatoire de Haute-Provence. Both stars were observed in the context of the SOPHIE exoplanet consortium’s dedicated M-dwarf subprogramme, which aims to detect exoplanets around nearby M-dwarf stars through a systematic survey. For Gl96 we present the discovery of a new exoplanet at 73.9 d with a minimum mass of 19.66 earth masses. Gl96 b has an eccentricity of 0.44, placing it among the most eccentric planets orbiting M stars. For Gl617A we independently confirm a recently reported exoplanet at 86.7 d with a minimum mass of 31.29 earth masses. Both Gl96 b and Gl617A b are potentially within the habitable zone, although the high eccentricity of Gl96 b may take it too close to the star at periapsis.
Key words: techniques: radial velocities / planetary systems / stars: late-type / stars: individual: Gl617A / stars: individual: Gl96
Based on observations collected with the SOPHIE spectrograph on the 1.93 m telescope at the Observatoire de Haute-Provence (CNRS), France, by the SOPHIE Consortium.
Full Tables A.1 and A.2 (RV tables) are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/618/A103
© ESO 2018
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.