High-Resolution Spectroscopy of the Hydrogen-Deficient Binary υ Sgr

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ID: 71759
2012
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Abstract
The high resolution spectra of hydrogen-deficient binary υ Sgr are analyzed. The atmospheric parameters are Teff = 12300±200 K, log g = 2:5±0:5 and ξt = 5 - 15 kms−1 depending on the element. For Fe II ξt = 9:3 ± 0:3 kms−1. Iron is slightly underabundant (-0.2 dex). Nitrogen is overabundant with [N/Fe]ͬ ≈ 1.0, carbon and oxygen are underabundant with [C/Fe] ≈ -1.6 and [O/Fe] ≈ -1.1. The s-process elements Y, Zr and Ba are overabundant about 0.5 dex. Quite large number of emission lines, both permitted and forbidden, originating from low excitation levels of neutral and ionized metals, are identified. Radial velocities of these emission lines indicate that an accretion disk in the system is present.
Reference Key
tnu2012highresolutionopen Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tõnu, Kipper;G., Klochkova Valentina;
Journal open astronomy
Year 2012
DOI
DOI not found
URL
http://www.degruyter.com/view/j/astro.2012.21.issue-3/astro-2017-0382/astro-2017-0382.xml?format=INT
Keywords
Therapeutics. Pharmacology Biology (General) Medicine Science nutrition. foods and food supply astronomy diseases of the musculoskeletal system

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