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| ID:
720411.0,
MPI für Astronomie / Publikationen_mpia |
| Preparation of the CARMENES input catalogue: Low- and high-resolution spectroscopy of M dwarfs |
| Authors: | Alonso-Floriano, F. J.; Montes, D.; Caballero, J. A.; Klutsch, A.; Jeffers, S.; Reiners, A.; Zechmeister, M.; Lamert, A.; Passegger, V. M.; Mundt, R.; Amado, P. J.; Berdinas, Z. M.; Casal, E.; Cortés-Contreras, M.; Morales, J. C.; Ribas, I.; Rodríguez-López, C.; Quirrenbach, A.; Harris, H. C. | | Place of Publication: | Flagstaff | | Publisher: | Lowell Observatory | | Date of Publication (YYYY-MM-DD): | 2015 | | Audience: | Not Specified | | Abstract / Description: | The identification of the most promising targets for exoplanet hunting is a crucial first step to ensure an efficient use of the CARMENES guaranteed time. To achieve this, we obtained low-resolution (R ˜ 1500) spectra of 752 M (and late K) dwarfs mostly fainter than J = 9 mag with CAFOS. For all of them, we derived spectral types with 0.5 subtypes accuracy. We also studied metallicity and surface gravity through spectral indices, and activity from pEW(Hα). Next, we observed over 600 M dwarfs at higher resolution (R = 30 000-48 000) with FEROS, CAFE and HRS. We determined rotational velocities, v sin{i} (±0.2-0.5 km s^{-1}), and radial velocities, V_r (±0.1-0.2 km s^{-1}), of the observed stars. From our observations, we identified high-activity, low-metallicity and low-gravity stars, single- and double-lined spectroscopic binaries and, specially, fast rotators, which should be discarded from any target list for exoplanet searches. Here we present preliminary results. | | External Publication Status: | published | | Document Type: | Other |
| Communicated by: | N. N. | | Affiliations: | MPI für Astronomie | | Identifiers: | URL:http://cdsads.u-strasbg.fr/abs/2015csss...18..796A
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