IGRINS Spectral Library

Autor: Gregory N. Mace, Hwihyun Kim, Jae-Joon Lee, Kang-Min Kim, Moo-Young Chun, Chan Park, Wonseok Kang, Kyle F. Kaplan, Sang-Gak Lee, Sunkyung Park, Jae Sok Oh, In-Soo Yuk, Daniel T. Jaffe, Jeong-Eun Lee, Sungho Lee
Rok vydání: 2018
Předmět:
Zdroj: The Astrophysical Journal Supplement Series. 238:29
ISSN: 1538-4365
DOI: 10.3847/1538-4365/aadd14
Popis: We present a library of high-resolution (R $\equiv$ $\lambda$/$\Delta$$\lambda$ $\sim$ 45,000) and high signal-to-noise ratio (S/N $\geq$ 200) near-infrared spectra for stars of a wide range of spectral types and luminosity classes. The spectra were obtained with the Immersion GRating INfrared Spectrograph (IGRINS) covering the full range of the H (1.496-1.780 $\mu$m) and K (2.080-2.460 $\mu$m) atmospheric windows. The targets were primarily selected for being MK standard stars covering a wide range of effective temperatures and surface gravities with metallicities close to the Solar value. Currently, the library includes flux-calibrated and telluric-absorption-corrected spectra of 84 stars, with prospects for expansion to provide denser coverage of the parametric space. Throughout the H and K atmospheric windows, we identified spectral lines that are sensitive to $T_\mathrm{eff}$ or $\log g$ and defined corresponding spectral indices. We also provide their equivalent widths. For those indices, we derive empirical relations between the measured equivalent widths and the stellar atmospheric parameters. Therefore, the derived empirical equations can be used to calculate $T_\mathrm{eff}$ and $\log g$ of a star without requiring stellar atmospheric models.
Comment: 65 pages, 27 figures, 8 tables, accepted for publication in ApJS
Databáze: OpenAIRE
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