Abstract
High resolution spectroscopic observation of V1719 Cyg were made at 1.8 meter
telescope of Bohyunsan Optical Astronomy observatory in Korea. Spectral resolving power
was R=45,000, signal to noise ratio S/N>100. The abundances of 28 chemical elements
from carbon to dysprosium were found with the spectrum synthesis method. The abundances
of oxygen, titanium, vanadium and elements with Z>30 are overabundant by 0.2–0.9 dex
with respect to the solar values. Correlations of derived abundances with condensation
temperatures and second ionization potentials of these elements are discussed. The
possible influence of accretion from interstellar environment is not so strong as for ρ
Pup and other stars with similar temperatures. The signs of accretion are absent. The
comparison of chemical composition with solar system r- & s-process abundance
patterns shows the enhancement of the photosphere by s-process elements.
Publisher
The Korean Space Science Society
Subject
General Earth and Planetary Sciences,General Physics and Astronomy
Reference31 articles.
1. Alania I, uvby β photometry of V1719 Cyg, Inf. Bull. Var. Stars.
2994, 1-3 (1987).
2. Böhm-Vitense E, The puzzle of the metallic line stars, Publ.
Astron. Soc. Pac. 118, 419-435 (2006). 10.1086/499385
3. Burbidge EM, Burbidge GR, Fowler WA, Hoyle F, Synthesis of the
elements in stars, Rev. Mod. Phys. 29, 547-650 (1957). 10.1103/RevModPhys.29.547
4. Castelli F, Kurucz R, New grids of ATLAS9 model atmospheres
(2003) [Internet], viewed 2020 Feb 20, available from:
https://arxiv.org/abs/astro-ph/0405087
5. Cowley CR, An examination of the planetesimal impact hypothesis
of the formation of CP stars, Astrophys. Space Sci. 51, 349-362 (1977).
10.1007/BF00644158
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