On the Theoretical Period‐Luminosity Relation of Cepheids | Zendy

Hideyuki Saio | Zendy; Alfred Gautschy | Zendy

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On the Theoretical Period‐Luminosity Relation of Cepheids

Author(s) -

Hideyuki Saio,

Alfred Gautschy

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/305544

Subject(s) - cepheid variable , instability strip , metallicity , luminosity , physics , astrophysics , period (music) , instability , stars , galaxy , mechanics , acoustics

The theoretical period-luminosity relation for Cepheids was deduced fromstellar evolution and pulsation computations. Questions concerning themetallicity dependence of the relation as well as the constancy of thepulsation `constant' Q in the instablility strip were addressed. We found nosignificant metallicity dependence of either the slope or of the zero-point ofthe period-luminosity relation. The Q-value, however, varies across theinstability strip, in effective temperature as well as in luminosity; itsmetallicity dependence, on the other hand, is marginal.Comment: 11 pages, 3 figures, to appear in ApJ May 1, 1998 issue, Vol 49

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