The visible spectra of Southern Hemisphere Mira variable stars

Details The visible spectra of Southern Hemisphere Mira variable stars The visible spectra of Southern Hemisphere Mira variable stars

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apjs...66...69c&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 66, Feb. 1988, p. 69-98. Research supported by NSERC, University

Astronomy and Astrophysics

Astrophysics

5

Astronomical Catalogs, Light (Visible Radiation), Mira Variables, Stellar Spectra, Absorption Spectra, Line Spectra, Southern Hemisphere

Scientific paper

A catalog of 72 southern hemisphere Mira variables has been compiled, which tabulates spectral types, Balmer emission-line ratios, and eye-estimated absorption-line intensities. It is shown from these data that the irregular behavior of absorption features in Mira variables can be explained by a second shock front higher in the atmosphere than the one producing hydrogen emission. Strong emission is associated with weak-line cycles, when overlying TiO absorption is less pronounced, suggesting that the velocity gradient may be responsible for line weakening.

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