2005A&A...430..255Y


Query : 2005A&A...430..255Y

2005A&A...430..255Y - Astronomy and Astrophysics, volume 430, 255-262 (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.

Abstract Copyright:

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

goto Full paper

goto View the references in ADS

Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 BPS CS 31082-0001 Pe* 01 29 31.1311443552 -16 00 45.495314460 12.527 12.427 11.642 11.189 10.713 CEMP 266 0
2 HD 115444 Pe* 13 16 42.4590842616 +36 22 52.692135420   9.77 8.97 8.3 7.88 G9V 232 0
3 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2222 0
4 BPS CS 30306-0132 Pe* 15 14 18.9191634456 +07 27 02.680959780   13.62 12.73 12.421 11.948 ~ 31 0
5 BD+17 3248 HB* 17 28 14.4690179544 +17 30 35.847574776   10.02 9.34     KIIvw 207 0
6 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 427 0
7 HD 221170 Pe* 23 29 28.8087143040 +30 25 57.849303180 9.43 8.74 7.66     G2IV 273 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...430..255Y and select 'bookmark this link' or equivalent in the popup menu


2022.05.22-00:05:11

© Université de Strasbourg/CNRS

    • Contact