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标题：Masses, oxygen, and carbon abundances in CHEPS dwarf stars ★
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作者：Y. V. Pavlenko ; B. M. Kaminsky ; J. S. Jenkins 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：621
DOI：10.1051/0004-6361/201834138
语种：English
出版社：EDP Sciences
摘要：Context.We report the results from the determination of stellar masses, carbon, and oxygen abundances in the atmospheres of 107 stars from the Calan-Hertfordshire Extrasolar Planet Search (CHEPS) programme. Our stars are drawn from a population with a significantly super-solar metallicity. At least 10 of these stars are known to host orbiting planets.Aims.In this work, we set out to understand the behaviour of carbon and oxygen abundance in stars with different spectral classes, metallicities, andVsiniwithin the metal-rich stellar population.Methods.Masses of these stars were determined using data fromGaiaDR2. Oxygen and carbon abundances were determined by fitting the absorption lines. We determined oxygen abundances with fits to the 6300.304 Å O Iline, and we used 3 lines of the C Iatom and 12 lines of the C2molecule for the determination of carbon abundances.Results.We determine masses and abundances of 107 CHEPS stars. There is no evidence that the [C/O] ratio depends onVsinior the mass of the star within our constrained range of masses, i.e. 0.82 5 km s−1) are massive stars.
关键词：Key wordsenplanetary systemsstars: abundancesstars: carbonastrochemistryline: profilesstars: solar type