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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 720410.0, MPI für Astronomie / Publikationen_mpia
CARMENES science preparation: low--resolution spectroscopy of M dwarfs
Authors:Alonso-Floriano, F. J.; Montes, D.; Caballero, J. A.; Klutsch, A.; Mundt, R.; Córtes-Contreras, M.; Morales, J. C.; Quirrenbach, A.; Amado, P. J.; Reiners, A.; Ribas, I.; Figueras, F.; Hernández-Monteagudo, C.; Trujillo Bueno, J.; Valdivielso, L.
Place of Publication:Barcelona
Publisher:Spanish Astronomical Society
Date of Publication (YYYY-MM-DD):2015
Audience:Not Specified
Abstract / Description:CARMENES is the new optical/near-infrared spectrograph at Calar Alto observatory. 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, using the CAFOS spectrograph of the 2.2 m telescope at Calar Alto observatory. We derived spectral types with 0.5 subtypes accuracy combining the spectral indices technique and the best-fit & χ^2 matches. We also studied metallicity and surface gravity through spectral indices, and activity from the pseudo-equivalent width of the Hα line. We identified high-activity, low-metallicity and low-gravity stars, which should be discarded for exoplanet searches. Here we present preliminary results.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:978-84-606-8760-3
URL:http://cdsads.u-strasbg.fr/abs/2015hsa8.conf..441A
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