view Abstract Citations (145) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the intrinsic properties of cepheids in the Galaxy, in Andromeda, and in the Magellanic Clouds. Iben, I., Jr. ; Tuggle, R. S. Abstract With opacities and opacity derivatives fitted by spline interpolation to fine-grid Cox-Stewart opacity tables, pulsation calculations have been performed in the linear nonadiabatic approximation to provide pulsation parameters for Cepheid models covering a range of masses, luminosities, and compositions required for a discussion of Population 1 variables. Analytic approximations to the results are used to illustrate how the location of one boundary of the instability strip in either the LT plane or the PL plane varies with the slope and normalization assumed for the mean mass-luminosity (ML) relationship for Cepheids. The results of pulsation calculations are used in conjunction with observational data to estimate (a) absolute magnitudes, (b) color-temperature conversions, (c) masses, and (d) composition parameters characterizing Cepheids in three extragalactic complexes: SMC, LMC, and M31. The slope of the ML relationship, the heavyelement abundance, the helium abundance, and the distance modulus for Cepheids in each of the three complexes are estimated, respectively to be: dlogL/dlog M 3.3, 3.65, and 4.0; Z 0.005,0.01, 0.02; Y 0.29 i 0.06; and distance modulus 19.25, 18.73, and 24.40. Subject headings: Cepheids and W Virginis stars - galaxies, individual - Galaxy, the - Magellanic Clouds Publication: The Astrophysical Journal Pub Date: April 1975 DOI: 10.1086/153486 Bibcode: 1975ApJ...197...39I Keywords: Andromeda Galaxy; Cepheid Variables; Magellanic Clouds; Milky Way Galaxy; Stellar Structure; Astronomical Models; Distance Measuring Equipment; Stellar Envelopes; Stellar Evolution; Stellar Luminosity; Astrophysics full text sources ADS | data products SIMBAD (7) NED (3)