Near-Infrared Classification Spectroscopy: H-band Spectra of Fundamental MK Standards

Details Near-Infrared Classification Spectroscopy: H-band Spectra of Fundamental MK Standards Near-Infrared Classification Spectroscopy: H-band Spectra of Fundamental MK Standards

1998-08-19

arxiv.org/abs/astro-ph/9808206v1

Astrophys.J. 508 (1998) 397

Astronomy and Astrophysics

Astrophysics

To appear in the November 20, 1998 issue of ApJ (Volume 508, #1)

Scientific paper

10.1086/306402

We present a catalogue of H-band spectra for 85 stars of approximately solar abundance observed at a resolving power of 3000 with the KPNO Mayall 4m FTS. The atlas covers spectral types O7-M5 and luminosity classes I-V as defined on the MK system. We identify both atomic and molecular indices and line-ratios which are temperature and luminosity sensitive allowing spectral classification to be carried out in the H-band. The line ratios permit spectral classification in the presence of continuum excess emission, which is commonly found in pre-main sequence and evolved stars. We demonstrate that with spectra of R = 1000 obtained at SNR > 50 it is possible to derive spectral types within +- 2 subclasses for late-type stars. These data are available electronically through the Astronomical Data Center in addition to being served on the World-Wide-Web.

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