Proc. IAU volume 13, issue S334, P329-330 2017 DOI: 10.1017/s1743921317007451 View full text
B. Lemasle, V. Kovtyukh, R. da Silva, R. Mor, G. Bono, F. Figueras, P. François, L. Inno, D. Magurno, N. Matsunaga, A. McWilliam, A. C. Robin

Abstract: AbstractCepheids are excellent stellar tracers: they are bright enough to be observed even at large distances; their distances can be accurately determined via period-luminosity relations; their spectra contain numerous lines that enable us to derive abundances for many α, iron-peak or neutron-capture elements. Classical Cepheids are yellow supergiants that trace the young populations (⩽ 300 Myr); Type II Cepheids are post Horizontal Branch, low-mass, Population II stars (⩾ 10 Gyr). Both can be used for many p…

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