Shock waves in Mira variables. I - Emission-line spectra

Details Shock waves in Mira variables. I - Emission-line spectra Shock waves in Mira variables. I - Emission-line spectra

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...286..337f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 286, Nov. 1, 1984, p. 337-349.

Astronomy and Astrophysics

Astrophysics

32

Balmer Series, Emission Spectra, Mira Variables, Shock Wave Propagation, Stellar Oscillations, Stellar Spectra, Variable Stars, Astronomical Catalogs, H Lines, High Dispersion Spectrographs, Radiant Flux Density, Stellar Models

Scientific paper

A catalog of Balmer emission-line profiles (H-gamma, H-delta, H-zeta, and H-eta) is presented for a sample of nine Mira variables ranging in period from 150 to 394 days. These were obtained at very high dispersion with phase coverage of about half a cycle centered around maximum. Observations of emission lines of Mg, Si, and Fe are also described. Variations with phase and cycle number of line-profile shape and flux are discussed in relation to a simple shock model in which a spherically symmetric shock wave is propagating outward through the atmosphere of a pulsating Mira variable. From the simple shock model, estimates are made for the shock speed and postshock temperature at phases during which the Balmer emission lines are visible.

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