Abstract
A period-luminosity-colour relation is derived from the data of 29 galactic Cepheids with known distances collected from the literature, and is then compared with the simpler period-luminosity relation. The insignificant reduction in the dispersion seems to argue against the introduction of the colour term. It is, however, demonstrated that this evidence may be fictitious and due to the use of Cepheids, whose membership in a star aggregate is still doubtful. The exclusion of these stars leads to a PLC relation which shows a significantly smaller dispersion than that given by the corresponding PL relation.
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Baade, W. and Swope, H. H.: 1963,Astron. J. 68, 435.
Crawford, D. L.: 1975,Publ. Astron. Soc. Pacific 87, 481.
de Vaucouleurs, G.: 1978,Astrophys. J. 223, 730.
Eggen, O. J.: 1977,Astrophys. J. Suppl. 34, 1.
Fernie, J. D.: 1970,Astron. J. 75, 244.
Forbes, D.: 1982,Astron. J. 87, 1022.
Gascoigne, S. C. B.: 1969,Monthly Notices Roy. Astron. Soc. 146, 1.
Hanson, R. B.: 1975,Astron. J. 80, 379.
Havlen, R. J.: 1972,Astron. Astrophys. 16, 252.
Ivanov, G. R. and Nikolov, N. S.: 1983,Astrophys. Space Sci. 94, 191.
Janot-Pacheco, E.: 1976,Astron. Astrophys. Suppl. 75, 159.
Johnson, H. L. and Morgan, W. W.: 1953,Astrophys. J. 117, 313.
Lub, J. and Pel, J. W.: 1977,Astron. Astrophys. 54, 149.
Martin, W. L., Thomas, W., Carter, B. S., and Davies, H. E.: 1981,South African Astron. Obs. Circ. 6, 31.
McClure, R. D. and Racine, R.: 1970,Astron. J. 74, 1000.
Sandage, A. and Tammann, G. A.: 1971,Astrophys. J. 167, 293.
Schaltenbrand, R. and Tammann, G. A.: 1971,Astron. Astrophy. Suppl. 4, 265.
Schmidt, E. G.: 1978,Astron. J. 83, 960.
Schmidt-Kaler, T.: 1961,Astron. Nachr. 286, 113.
Tammann, G. A., Sandage, A., and Yahil, A.: 1980, in R. Balian, J. Audouze, and D. N. Schramm (eds.),Physical Cosmology, North-Holland Publ. Co., p. 56.
Topactas, L.: 1981,Astron. Astrophys. Suppl. 45, 111.
Tsarewskij, G. S.: 1971,Soviet Astron. AJ 15, 169.
Turner, D. G.: 1980,Astrophys. J. 235, 146.
van den Bergh, S.: 1960,D. Dunlap Obs. Publ. 6, 2.
van den Bergh, S.: 1977,IAU Colloq. 37, 13.
Warren, P. R.: 1977,Monthly Notices Roy. Astron. Soc. 178, 21P.
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Cester, B., Marsi, C. On the period-luminosity-colour relation for galactic Cepheids. Astrophys Space Sci 107, 167–176 (1984). https://doi.org/10.1007/BF00649622
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DOI: https://doi.org/10.1007/BF00649622