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- Title
On the metallicity dependence of classical Cepheid light amplitudes.
- Authors
Majaess, D.; Turner, D.; Gieren, W.; Berdnikov, L.; Lane, D.
- Abstract
Classical Cepheids remain a cornerstone of the cosmic distance scale, and thus characterizing the dependence of their light amplitude on metallicity is important. Period-amplitude diagrams constructed for longer-period classical Cepheids in IC 1613, NGC 3109, SMC, NGC 6822, LMC, and the Milky Way imply that very metal-poor Cepheids typically exhibit smaller V-band amplitudes than their metal-rich counterparts. The results provide an alternate interpretation relative to arguments for a null and converse metallicity dependence. The empirical results can be employed to check predictions from theoretical models, to approximate mean abundances for target populations hosting numerous long-period Cepheids, and to facilitate the identification of potentially blended or peculiar objects.
- Subjects
DEPENDENCE (Statistics); EXTRAGALACTIC distances; PREDICTION models; CEPHEIDS; APPROXIMATION theory; COSMIC abundances; STELLAR oscillations
- Publication
Astrophysics & Space Science, 2013, Vol 344, Issue 2, p381
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-012-1331-z