The iron and oxygen content of LMC Classical Cepheids and its implications for the extragalactic distance scale and Hubble constant Equivalent width analysis with Kurucz stellar atmosphere models (vol 658, A29, 2022)
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The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurem
Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily