SIMBAD references

2017ApJS..230...23V - Astrophys. J., Suppl. Ser., 230, 23-23 (2017/June-0)

The extended IRTF spectral library: expanded coverage in metallicity, temperature, and surface gravity.


Abstract (from CDS):

We present a 0.7-2.5 µm spectral library of 284 stars observed with the medium-resolution infrared spectrograph, SpeX, at the 3.0 m NASA Infrared Telescope Facility (IRTF) on Maunakea, Hawaii. This library extends the metallicity range of the IRTF Cool Star library beyond solar metallicity to -1.7 < [Fe/H] < 0.6. All of the observed stars are also in the MILES optical stellar library, providing continuous spectral coverage for each star from 0.35 to 2.5 µm. The spectra are absolute flux calibrated using Two Micron All Sky Survey photometry, and the continuum shape of the spectra is preserved during the data reduction process. Synthesized JHKS colors agree with observed colors at the 1%-2% level, on average. We also present a spectral interpolator that uses the library to create a data-driven model of spectra as a function of Teff, log g, and [Fe/H]. We use the library and interpolator to compare empirical trends with theoretical predictions of spectral feature behavior as a function of stellar parameters. These comparisons extend to the previously difficult to access low-metallicity and cool dwarf regimes, as well as the previously poorly sampled super-solar metallicity regime. The library and interpolator are publicly available.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): atlases - galaxies: stellar content - infrared: stars - planets and satellites: fundamental parameters - stars: fundamental parameters - techniques: spectroscopic - techniques: spectroscopic

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 421

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