Chemical Composition and Photometry of BE Lyncis

Autor:	Y.-B. Jeon, A. V. Yushchenko, Chun-Hwey Kim, Chulhee Kim, Sanghyuk Kim
Rok vydání:	2012
Předmět:	Photometry (optics) Stars chemistry Space and Planetary Science LYN Metallicity chemistry.chemical_element Astronomy and Astrophysics Astrophysics Sulfur Nitrogen Chemical composition Neodymium
Zdroj:	Publications of the Astronomical Society of the Pacific. 124:401-410
ISSN:	1538-3873 0004-6280
DOI:	10.1086/665943
Popis:	High-resolution spectroscopic observation was carried out to find the chemical composition of BE Lyn. The abundances of 25 chemical elements from carbon to neodymium were found. The deficiency of iron appeared to be equal to ΔlogNðFe Þ¼� 0:26 � 0:08 with respect to the solar metallicity, and the abundances of other elements were mainly undersolar. Only nitrogen, sodium, aluminum, and sulfur showed overabundances near 0.2-0.3 dex. The abundance pattern showed no clear signs of accretion or mass transfer events. It is not possible to exclude the classification of BE Lyn as a SX Phe-type star with slightly undersolar abundances of chemical ele- ments. In addition, new differential time-series observations of BE Lyn were secured using V filters, and seven new times of light maximum were identified. We collected 162 times of light maximum from the literature, unpublished data, and an open database, and we proceeded to investigate the pulsational properties of BE Lyn. All five harmonic frequencies were identified using the Fourier decomposition method. Online material: extended tables
Databáze:	OpenAIRE
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