文章基本信息

标题：Chemical Composition of RR Lyn – an Eclipsing Binary System with Am and λ Boo Type Components
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作者：Yeuncheol Jeong ; Alexander V. Yushchenko ; Dmytry N. Doikov 等
期刊名称：Journal of Astronomy and Space Sciences
印刷版ISSN：2093-5587
电子版ISSN：2093-1409
出版年度：2017
卷号：34
期号：2
页码：75-82
DOI：10.5140/JASS.2017.34.2.75
语种：English
出版社：Korean Space Science Society
摘要：High-resolution spectroscopic observations of the eclipsing binary system RR Lyn were made using the 1.8 m telescope at the Bohuynsan Optical Astronomical Observatory in Korea. The spectral resolving power was R = 82,000, with a signal to noise ratio of S/N > 150. We found the effective temperatures and surface gravities of the primary and secondary components to be equal to Teff = 7,920and7,210 K and log(g) = 3.80and4.16, respectively. The abundances of 34 and 17 different chemical elements were found in the atmospheric components. Correlations between the derived abundances with condensation temperatures and the second ionization potentials of these elements are discussed. The primary component is a typical metallic line star with the abundances of light and iron group elements close to solar values, while elements with atomic numbers Z > 30 are overabundant by 0.5–1.5 dex with respect to solar values. The secondary component is a λ Boo type star. In this type of stars, CNO abundances are close to solar values, while the abundance pattern shows a negative correlation with condensation temperatures.
关键词：stars;eclipsing binaries (RR Lyn);individual (RR Lyn);abundances;accretion;chemically peculiar