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Title:
The visible spectra of Southern Hemisphere Mira variable stars
Authors:
Crowe, Richard A.; Garrison, Robert F.
Affiliation:
AA(Canada-France-Hawaii Telescope Corp., Hilo, HI), AB(David Dunlap Observatory, Richmond Hill, Canada)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 66, Feb. 1988, p. 69-98. Research supported by NSERC, University of Toronto, Canada-France-Hawaii Telescope Corp., and University of Hawaii. (ApJS Homepage)
Publication Date:
02/1988
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL CATALOGS, LIGHT (VISIBLE RADIATION), MIRA VARIABLES, STELLAR SPECTRA, ABSORPTION SPECTRA, LINE SPECTRA, SOUTHERN HEMISPHERE
DOI:
10.1086/191247
Bibliographic Code:
1988ApJS...66...69C

Abstract

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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