RR Lyrae - Theory vs Observation

Details RR Lyrae - Theory vs Observation RR Lyrae - Theory vs Observation

2000-01-25

arxiv.org/abs/astro-ph/0001442v2

ApJ, Vol. 540, p. 468-473 (2000)

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures (revised april 2000, revisions relatively minor)

Scientific paper

10.1086/309330

The luminosities, effective temperatures and metallicities that are derived empirically by Kovacs and Jurcsik from the light curves of a large number of globular cluster and field RRab and RRc stars are compared to theoretical RR Lyrae models. The strong luminosity dependence of the empirical blue and red edges (Log L vs Log Teff diagram) is in disagreement with that of both radiative and convective models. A reexamination of the theoretical uncertainties in the modelling leads us to conclude that the disagreement is irreconcilable.

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