SIMBAD references

2019ApJ...878..134K - Astrophys. J., 878, 134-134 (2019/June-3)

Characterization of a sample of Southern M dwarfs using HARPS and X-shooter spectra.


Abstract (from CDS):

We present the homogeneous analysis of a sample of Southern early-type M dwarfs in the solar neighborhood (d < 60 pc). We used the MCAL technique to derive the effective temperature Teff, metallicity [Fe/H], and activity index ia(Halpha) of 420 M stars using HARPS spectra. The effective temperature Teff, surface gravity log g, metallicity [Fe/H], and projected rotational velocity Vrotsini of 153 M0-M6 dwarfs were determined by fitting the observed intermediate-resolution spectra from the VIS arm of VLT/X-shooter with a grid of BT-Settl stellar atmosphere models. We estimated the typical uncertainties of the fit with X-shooter spectra by varying region-to-region results by σTeff ∼ 50 K, σlog g ∼ 0.2, and σ[Fe/H] ∼ 0.2 dex. Photometric verification of Teff for the 295 stars from the HARPS sample and the 61 stars from the X-shooter sample is also provided. We compared our results from different methods to estimate absolute uncertainty in determining the physical properties of M dwarfs.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: abundances - stars: fundamental parameters - stars: low-mass - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/878/134): table2.dat table3.dat>

Simbad objects: 540

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