Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..548h&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Dec. 1, 1979, p. 548-555.
Astronomy and Astrophysics
Astrophysics
26
Atomic Spectra, Infrared Spectroscopy, Mira Variables, Stellar Spectrophotometry, Variable Stars, Absorption Spectra, Molecular Excitation, Optical Thickness, Radial Velocity
Scientific paper
The well-known peculiarities of the visual atomic line spectra of Miras have prompted analysis of the infrared atomic lines in the 2 micron region spectrum of R Leonis. The radial velocities of the infrared atomic lines are in excellent agreement with the molecular high-excitation lines. The lowest-excitation atomic lines occurring in the infrared spectra develop inverse P Cygni profiles during premaximum phases. Continuum optical depth changes during the light cycle are indicated. Brackett-y appears weakly in emission between roughly phases 0.9 and 0.1. The infrared high-excitation absorption lines, both atomic and molecular, demonstrate that a shock produced by the general pulsation of the Mira passes through the photosphere near maximum light. A brief discussion of the relationship between the very different phase-dependent behavior of the infrared and visual atomic absorption lines is presented.
Barnes Th. G.
Hinkle Kenneth H.
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