Peculiarities of α-element abundances in Galactic open clusters
نویسندگان
چکیده
منابع مشابه
Metal abundances of A-type stars in galactic clusters III. α Persei: new results
We complete our study (Hui-Bon-Hoa et al. 1997) of the abundances of Mg, Ca, Sc, Cr, Fe, and Ni in α Per cluster stars using new spectra of two stars of the previous sample and also adding two more objects. The new spectra of BD +48◦894 and HD 21527 show that the former has an almost solar composition whereas the latter is an Am star with the iron peak elements being all enhanced and Ca margina...
متن کاملElement Abundances and Galactic Chemical Evolution
Recent developments in the study of element abundances and their impact on our understanding of the evolution of stars and the chemical evolution of the Galaxy are described. In particular, problems that may beneet, or beneet from, work on binary stellar populations are highlighted. These include: diierent mixing processes in globular cluster and eld stars, evidenced by Li and nuclei in the NeN...
متن کاملGalactic Open Clusters
The study of open clusters has a classic feel to it since the subject predates anyone alive today. Despite the age of this topic, I show via an ADS search that its relevance and importance in astronomy has grown faster in the last few decades than astronomy in general. This is surely due to both technical reasons and the interconnection of the field of stellar evolution to many branches of astr...
متن کاملIntermediate Element Abundances in Galaxy Clusters
We present the average abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA. We determine the abundances of Fe, Si, S, and Ni as a function of cluster temperature (mass) from 1 – 10 keV, and place strong upper limits on the abundances of Ca and Ar. In general, Si and Ni are overabundant with respe...
متن کاملMetal abundances of A-type stars in three galactic clusters
Investigations have been carried out for 11 A stars in young open clusters (α Per, Coma, and Praesepe) and three field stars by means of high resolution spectroscopy. Detailed abundance analyses have been made for Mg, Ca, Sc, Cr, Fe, and Ni. The results are discussed in the framework of element stratification processes as invoked by time-dependent diffusion mechanisms in Am stars. The youngest ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy Reports
سال: 2016
ISSN: 1063-7729,1562-6881
DOI: 10.1134/s1063772915120033