Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sva....26..666t&link_type=abstract
(Astronomicheskii Zhurnal, vol. 59, Nov.-Dec. 1982, p. 1103-1114) Soviet Astronomy (ISSN 0038-5301), vol. 26, Nov.-Dec. 1982, p.
Astronomy and Astrophysics
Astronomy
1
Cepheid Variables, Dwarf Stars, Stellar Oscillations, Hertzsprung-Russell Diagram, Statistical Analysis, Stellar Luminosity, Tables (Data)
Scientific paper
From Breger's 1979 survey of the observational data for the Delta Sct variables, radial pulsation modes are assigned to 83 of these stars. They can pulsate in the four lowest modes: F, 1H, 2H, 3H, and perhaps also in 4H and even 5H. Confirming the author's earlier suggestion, the apparent nonuniformity in the distribution of Delta Sct stars both with respect to period and in the period-luminosity diagram may naturally be attributed to pulsation in differing modes. Semiempirical (P, L) relations are derived for the four lowest modes, and the semiempirical and theoretical period ratios are compared. Several statistical relationships are obtained, and in certain cases criteria are proposed for determining the radial-pulsation mode.
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