The behavior of some red and infrared helium lines

Details The behavior of some red and infrared helium lines The behavior of some red and infrared helium lines

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...282..911j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 3, p. 911-915

Astronomy and Astrophysics

Astronomy

11

Early Stars, Helium, Infrared Astronomy, Infrared Stars, Line Spectra, Stellar Atmospheres, Stellar Spectra, Visible Spectrum, Absorption Spectra, Astronomical Spectroscopy, Infrared Spectra

Scientific paper

We analyze the behavior of six lines of neutral helium and one line of ionized helium located in the 6500-10150 A wavelength region. A comparison was made, whenever possible, of our observations and the model calculations of Auer & Mihalas (1972, 1973). In two out of three cases the agreement is satisfactory with calculations for nonlocal thermodynamic equilibrium (NLTE) and no overlap with H lines. We report the detection and provide measurements of two more helium absorption lines, lambda(8779) and lambda(8584) not reported previously in the literature.

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