|
|||||
|
|
On the metallicity dependence of classical Cepheid light amplitudes |
|
| Authors: | D Majaess D Turner W Gieren L Berdnikov D Lane |
| Institution: | 1. Halifax, NS, Canada 2. Department of Astronomy and Physics, Saint Mary’s University, Halifax, NS, B3H 3C3, Canada 3. Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, CL Concepción, Chile 4. Sternberg Astronomical Institute, Moscow M.V. Lomonosov State University, Moscow, 119992, Russia 5. Isaac Newton Institute of Chile, Moscow Branch, Universitetskij Pr. 13, Moscow, 119992, Russia 6. Department of Astronomy and Physics, Saint Mary’s University, Halifax, NS, B3H 3C3, Canada |
| 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. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |