New Teff and [Fe/H] spectroscopic calibration for FGK dwarfs and GK giants

Bibcode
2016A&A...595A..15T
DOI
10.1051/0004-6361/201525783
Teixeira, G. D. C.; Sousa, S. G.; Tsantaki, M.; Monteiro, M. J. P. F. G.; Santos, N. C.; Israelian, G.
Bibliographical reference

Astronomy and Astrophysics, Volume 595, id.A15, 8 pp.

Advertised on:
10
2016
Journal
Astronomy and Astrophysics
Number of authors
6
IAC number of authors
1
Citations
8
Refereed citations
7
Description
Context. The ever-growing number of large spectroscopic survey programs has increased the importance of fast and reliable methods with which to determine precise stellar parameters. Some of these methods are highly dependent on correct spectroscopic calibrations. Aims: The goal of this work is to obtain a new spectroscopic calibration for a fast estimate of Teff and [Fe/H] for a wide range of stellar spectral types. Methods: We used spectra from a joint sample of 708 stars, compiled from 451 FGK dwarfs and 257 GK-giant stars. We used homogeneously determined spectroscopic stellar parameters to derive temperature calibrations using a set of selected EW line-ratios, and [Fe/H] calibrations using a set of selected Fe I lines. Results: We have derived 322 EW line-ratios and 100 Fe I lines that can be used to compute Teff and [Fe/H], respectively. We show that these calibrations are effective for FGK dwarfs and GK-giant stars in the following ranges: 4500 K
Type
Refereed
Techniques
Methods

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