Radial and non-radial oscillations in the very high metallicity Delta Scuti star HD 188136

Details Radial and non-radial oscillations in the very high metallicity Delta Scuti star HD 188136 Radial and non-radial oscillations in the very high metallicity Delta Scuti star HD 188136

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193...29k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Oct. 1980, p. 29-49.

Astronomy and Astrophysics

Astronomy

23

Cepheid Variables, H Beta Line, Metallic Stars, Stellar Oscillations, Stellar Spectra, Frequency Response, Hertzsprung-Russell Diagram, Light Curve, Radial Distribution, Stellar Luminosity, Stellar Spectrophotometry, Stellar Temperature, Tables (Data)

Scientific paper

The paper analyzes observations which show that HD 188136 is a Delta Scuti star. The metallicity index and the Sr4077 line which is nearly as strong as H(delta) show that this star has a very high metallicity. Frequency analysis of 173 hr observations obtained on 30 nights in 1978-79 was made; three frequencies were present throughout the entire data set, one of which is due to a nonradial mode. It is suggested that since the Delta Scuti star evolves off the main sequence, it passes through a stage where radial and nonradial modes of the same k-value coincide.

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