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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 710060.0, MPI für Astronomie / Publikationen_mpia
High-resolution spectroscopic atlas of M subdwarfs. Effective temperature and metallicity
Authors:Rajpurohit, A. S.; Reylé, C.; Allard, F.; Scholz, R. -. D.; Homeier, D.; Schultheis, M.; Bayo, A.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:Astronomy and Astrophysics
Volume:564
Start Page:id. A90 (14 pp)
Audience:Not Specified
Abstract / Description:Context. M subdwarfs are metal-poor and cool stars. They are important probes of the old galactic populations. However, they remain elusive because of their low luminosity. Observational and modelling efforts are required to fully understand their physics and to investigate the effects of metallicity in their cool atmospheres. <BR /> Aims: We performed a detailed study of a sample of subdwarfs to determine their stellar parameters and constrain the state-of-the art atmospheric models. <BR /> Methods: We present UVES/VLT high-resolution spectra of three late-K subdwarfs and 18 M subdwarfs. Our atlas covers the optical region from 6400 Å to the near-infrared at 8900 Å. We show spectral details of cool atmospheres at very high-resolution (R ~ 40 000) and compare them with synthetic spectra computed from the recent
Free Keywords:stars: atmospheres; stars: fundamental parameters; stars: low-mass; subdwarfs
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-6361 %R 10.1051/0004-6361/201322881
URL:http://cdsads.u-strasbg.fr/abs/2014A%26A...564A..9...
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