PR and PL (PMv) relations for classical Cepheids revisited | Zendy

S. Šegan | Zendy; P. Glišović | Zendy

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PR and PL (PMv) relations for classical Cepheids revisited

Author(s) -

S. Šegan,

P. Glišović

Publication year - 2009

Publication title -

serbian astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.196

H-Index - 16

eISSN - 1820-9289

pISSN - 1450-698X

DOI - 10.2298/saj0979101s

Subject(s) - cepheid variable , physics , cosmic distance ladder , astrophysics , radius , angular diameter , cosmic cancer database , luminosity , astronomy , brightness , relation (database) , galaxy , stars , computer security , redshift , database , computer science

Using observational data available for a large number of Galactic Cepheids, we determine the relation between the radius and the period of pulsations, by means of a variant of the Baade-Wesselink method. Using, further, the brightness parameter according to the Barnes-Evans approach, we achieve our final goal, determination of the relation between the period and the mean luminosity. The coefficients in both relations are realistic. We indicate the need for accurate angular diameters of the Cepheids, which would be useful since the Cepheids are standard candles in the cosmic distance scale

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