SIMBAD references

2005A&A...430..255Y - Astronomy and Astrophysics, volume 430255-262 (2005/1-4)

Thorium-rich halo star HD221170: Further evidence against the universality of the r-process.

YUSHCHENKO A., GOPKA V., GORIELY S., MUSAEV F., SHAVRINA A., KIM C., KANG Y.W., KUZNIETSOVA J. and YUSHCHENKO V.

Abstract (from CDS):

We report the abundance determination in the atmosphere of the bright halo star HD 221170. The spectra were taken with the Terskol Observatory's 2.0-m telescope with a resolution R=45000 and signal-to-noise ratio up to 250 in the wavelength region 3638-10275Å. The adopted atmospheric parameters correspond to an effective temperature Teff=4475K, a surface gravity logg=1.0, a microturbulent velocity vmicro=1.7km/s, and a macroturbulent velocity vmacro=4km/s. The abundances of 43 chemical elements were determined with the method of spectrum synthesis. The large overabundances (by 1 dex relative to iron) of elements with Z>38 are shown to follow the same pattern as the solar r-abundances. The present HD 221170 analysis confirms the non-universality of the r-process, or more exactly the observation that the astrophysical sites hosting the r-process do not always lead to a unique relative abundance distribution for the bulk Ba to Hg elements, the Pb-peak elements, and the actinides.

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Journal keyword(s): line: identification - stars: abundances - stars: atmospheres - stars: evolution - stars: individual: HD 221170 - nuclear reactions, nucleosynthesis, abundances

VizieR on-line data: <Available at CDS (J/A+A/430/255): table1.dat table2.dat>

Simbad objects: 7

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