The AMBRE Project: Stellar parameterisation of the ESO:FEROS archived spectra
作者： C. C. Worley , P. de Laverny , A. Recio-Blanco , V. Hill , A. Bijaoui
DOI: 10.1051/0004-6361/201218829
关键词:
摘要: Context. The AMBRE Project is a collaboration between the European Southern Observatory (ESO) and Observatoire de la Cote d’Azur (OCA) that has been established to determine stellar atmospheric parameters for archived spectra of four ESO spectrographs. Aims. analysis UVES their was completed in third phase Project. From complete ESO:UVES archive dataset received covering period 2000 2010, 51 921 six standard setups were analysed. These correspond approximately 8014 distinct targets (that comprise non-stellar objects) by radial coordinate search. Methods. pipeline integrates spectral normalisation, cleaning velocity correction procedures order can then be analysed automatically with parameterisation algorithm MATISSE obtain parameters. synthetic grid against which carried out currently constrained FGKM stars only. Results. Stellar are reported 12 403 AMBRE:UVES. This equates ~23.9% sample ~3708 stars. Effective temperature, surface gravity, metallicity, alpha element iron ratio abundances provided 10 212 (~19.7%), while effective temperature at least remaining 2191 spectra. Radial velocities 36 881 (~71.0%) While determined 32 306 (62.2%) these not considered reliable (and thus ESO) reasons such as very low S/N, too poor determination, features broad analysis, technical issues from reduction. Similarly further 7212 (13.9%) also based on quality criteria error within automated process. Those tests lead us expect multi-component systems will return high errors fitting therefore have ESO. Typical external σ T eff ~ 110 dex, log g 0.18 [ M/H ] 0.13 α / Fe 0.05 dex some variation giants dwarfs reported. Conclusions. used observe an extensive collection objects all included OCA extracts those lie parameter space slow-rotating grid. Thus homogeneous blind successfully extracted parameterised targeted FGK (23.9% sample) archive.
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