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As the brightest K-type giant in the sky, it has been the subject of multiple atlases with coverage from the ultraviolet to infrared. [26][27] The spectrum shows a dramatic transition from emission lines in the ultraviolet to atomic absorption lines in the visible range and molecular absorption lines in the infrared.
Spectrum of Arcturus captured using DSLR with spectroscopic filter. The spectrum contains moderate absorption lines from sodium and neutral metals, together with very weak hydrogen. This is consistent with a an orange K-class star.
We investigate the infrared spectrum of Arcturus to clarify the nature of the cool component of its atmosphere, referred to as the CO-mosphere, and its relationship to the warm molecular envelope or the MOLsphere in cooler M (super)giant stars.
9 Ιουν 2023 · Arcturus is a giant star of the spectral type K1.5IIIFe-0.5. It is the brightest class K giant in the sky, outshining Aldebaran (mag. 0.86) in the constellation Taurus and Pollux (mag. 1.14) in Gemini. It has an absolute magnitude of about -0.30.
Aims.We investigate the infrared spectrum of Arcturus to clarify the nature of the cool component of its atmosphere, referred to as the CO-mosphere, and its relationship to the warm molecularenvelope or the MOLsphere in cooler M (super)giant stars.
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
1 Νοε 1995 · A spectral atlas of the infrared spectrum of the bright K 2 giant Arcturus has been completed using the 4 meter Mayall telescope and FTS. The 0.9-5.3 micron spectrum of Arcturus was observed at high signal-to-noise with a resolution of 100,000.
