Programme:
Members:
Grenoble: Xavier Delfosse, Jean-Luc Beuzit, Christian Perrier, Lydie Marchal
Hawai (CFH): Thierry Forveille
Geneva: Michel Mayor, Stephane Udry, Damien Segransan
Detector: Elodie
Time allocation: 12 nights per semester
Sample:
A sample of ~120 M-dwarf stars from the CNS3 catalogue
Northern sky: delta > -16
Limit distance: 9 pc
Limit magnitude: mv < 15
Volume limited until spectral type M5.5V and with extension to M6.5V
Results and discoveries:
- A planet around an M dwarf
- The closest extrasolar planet
- Gl 876 at OHP
- New detections
- New neighbours. I. 13 new companions to nearby M dwarfs: preprint [316 Kb], A&A paper
The third detached M-dwarf eclipsing binary:
- Mass determination with a 0.3% accuracy
- GJ 2069A, a new M dwarf eclipsing binary preprint, A&A paper
Precise mass determination by combining visual and spectroscopic Data
- Elodie high-precision radial velocities
- PUE'O (CFHT) and ADONIS (ESO) adaptive optics imaging
- ~ 10 accurate new mass determinations
- Mass determinations with a 3-4% accuracy
- Accurate masses of very low mass stars. IV. Improved mass-luminosity relations A&A paper
- Accurate masses of very low mass stars. III. 16 new or improved masses A&A paper
- Accurate masses of very low mass stars. II. The very low mass triple system GL 866 A&A paper
- Accurate masses of very low mass stars. I. GL 570BC (0.6 M_sun+0.4 M_sun) A&A paper
By products
- Rotation and chromospheric activity in field M dwarfs Delfosse et al. 1998, A&A
Programme extension in the southern sky
Sample:
- ~ 100 more stars in the south
- ~ same specifications as for the northern sample
- Wawelength extension in the red with regard to Coralie
- Installed on the ESO-Bresilian 1.5-m telescope at La Silla
- Programme status: application for observational time
- Rotation and chromospheric activity of the sample stars
- Follow up of the FEROS interesting brighter sources
Extrasolar planet page
Planet Search and Stellar Kinematics group page
Geneva observatory
University of Geneva
