Red variable stars. II - Spectral classification of Mira variables with phenomenological and photometric procedure

Details Red variable stars. II - Spectral classification of Mira variables with phenomenological and photometric procedure Red variable stars. II - Spectral classification of Mira variables with phenomenological and photometric procedure

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..527c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, April 1984, p. 527-548. Research supported by the Universidad Catolica de Chile.

Astronomy and Astrophysics

Astronomy

13

Astronomical Catalogs, M Stars, Mira Variables, Red Giant Stars, Spectrum Analysis, Stellar Spectrophotometry, Variable Stars, Absorption Spectra, Binary Stars, Infrared Photometry, Infrared Spectra, Near Infrared Radiation, Radiant Flux Density, Stellar Color, Titanium Oxides, Ubv Spectra, Visible Spectrum

Scientific paper

A spectrum-photometric classification based on 167 spectrograms, from the Cerro Tololo Inter-American Observatory, for 28 Mira variables and with corresponding UBVRI photometry was discussed. Spectrographic profiles were presented for the M0 to M8 classification. A spectrum color index scale was achieved after determining the following double spectral classification for V-R and R-I color indices: V-R = 0.0076 S cu + 1.2; R-I = 0.16 S + 0.82 if S is less than M3; and R-I = 0.36 S + 0.28 if S is greater than or equal to M3. In the spectra M7-M8, TiO bands absorption almost eliminated radiant energy in the visual region. In the context of the scale of spectral classification, spectrophotometric characteristics of the singular R Aqr Mira were analyzed, and the classification of 40 Mira stars was provided based on near-infrared photometry.

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