The lambda 10830 He I line in the cool giant HR 1105

Details The lambda 10830 He I line in the cool giant HR 1105 The lambda 10830 He I line in the cool giant HR 1105

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..290s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Oct. 1979, p. 542-545.) Soviet Astronomy Letters, vol. 5, Sept.-Oct. 1979, p. 290, 2

Astronomy and Astrophysics

Astronomy

3

Giant Stars, Helium Ions, Line Spectra, Near Infrared Radiation, Stellar Spectrophotometry, Absorption Spectra, Chromosphere, Emission Spectra, Spectrograms, Spectrum Analysis, Time Dependence

Scientific paper

Near-infrared spectrograms at 48-A/mm dispersion show a strong 10830-A wavelength He I line in the spectrum of the cool (M4 III) giant Hr 1105. The absorption-emission profile of the line varies with time. The absorption component has an equivalent width as great as 2.5 A. In view of its high excitation potential the 10830-A line might be of chromospheric origin.

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