Infrared Atlas of the Arcturus Spectrum, 0.9-5.3 microns

Abstract

ABSTRACT. A spectral atlas of the infrared spectrum of the bright K2 giant Arcturus has been completed using the 4-m Mayall telescope and FTS. The 0.9-5.3 ¡im spectrum of Arcturus was observed at high signal to noise with a resolution of 100,000. Telluric lines were removed by using telluric transmission spectra generated from McMath-Pierce solar spectra or 4-m lunar spectra. The spectrum of Arcturus was observed on two different dates selected to give large opposite heliocentric shifts. The spectra observed on the different dates have been independently corrected for telluric absorption with the result that the telluric spectrum has been effectively removed from all but the most obscured wavelengths of the Arcturus spectrum. We attempted to identify lines with central depths stronger than a few percent. Identifications seem well in hand with the unidentified lines apparently atomic in origin. The atlas is available either on an AAS CD-ROM or as an ASP monograph.

Comprehensive abundance analysis of red giants in the open clusters NGC 1342, 1662, 1912, 2354 and 2447

“…The EWs for these lines have been measured only when they appear to be Doppler shifted away from the telluric components, as judged by referring to the Arcturus spectrum (Hinkle et al 2000).…”

Abundances of Red Giants in the Old Open Cluster Collinder 261

“…Each order of the spectrum has been flattened and the continuum set to 1, but there remain slight variations, and the use of an interactive measure allows the continuum level to be set locally. Line blanketing is significant in these cool and metal-rich stars, so we used the high-resolution spectrum of Arcturus (Hinkle et al 2000), convolved to our observed resolution, to aid in determining the continuum level. Because our analysis was ultimately done relative to Arcturus, all lines were also measured from the original, high-resolution Arcturus spectrum.…”

Crires-Pop

“…We used the identifications given in the infrared atlas of Arcturus (Hinkle et al 1995), the line lists provided by Kurucz & Bell (1995), the list of iron lines in Nave et al (1994), the HITRAN database from Rothman et al (2008), and the identifications of SiO and OH lines at 4 μm given in Ridgway et al (1984). The attribution of atomic or molecular transitions to the observed features was based on identifications for similar stars presented in the literature or the most probable origin of the line, and have in some cases been verified by spectral modelling.…”

“…As a result, line data for many elements, but especially the post-iron group elements, are severely lacking and those that exist are predominantly the result of theoretical calculations. The atlases of the solar spectrum (Wallace et al 1996;Delbouille et al 1973) and the K giant Arcturus (Hinkle et al 1995) illustrated the value of a stellar reference spectrum at high spectral resolution and high S/N.…”