2013A&A...555A...6S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET23:26:00

2013A&A...555A...6S - Astronomy and Astrophysics, volume 555A, 6-6 (2013/7-1)

Stellar substructures in the solar neighbourhood. II. Abundances of neutron-capture elements in the kinematic group 3 of the Geneva-Copenhagen survey.

STONKUTE E., TAUTVAISIENE G., NORDSTROEM B. and ZENOVIENE R.

Abstract (from CDS):

The evolution of chemical elements in a galaxy is linked to its star formation history. Variations in star formation history are imprinted in the relative abundances of chemical elements produced in different supernova events and asymptotic giant branch stars. We determine detailed elemental abundances of s- and r-process elements in stars belonging to Group 3 of the Geneva-Copenhagen survey and compare their chemical composition with Galactic disc stars. The aim is to look for possible chemical signatures that might give information about the formation history of this kinematic group of stars, which is suggested to correspond to remnants of disrupted satellites. High-resolution spectra were obtained with the FIES spectrograph at the Nordic Optical Telescope, La Palma, and were analysed with a differential model atmosphere method. Comparison stars were observed and analysed with the same method. Abundances of chemical elements produced mainly by the s-process are similar to those in the Galactic thin-disc dwarfs of the same metallicity, while abundances of chemical elements produced predominantly by the r-process are overabundant. The similar elemental abundances are observed in Galactic thick-disc stars. The chemical composition together with the kinematic properties and ages of stars in Group 3 of the Geneva-Copenhagen survey support a gas-rich satellite merger scenario as the most likely explanation for the origin. The similar chemical composition of stars in Group 3 and the thick-disc stars might suggest that their formation histories are linked.

Abstract Copyright:

Journal keyword(s): stars: abundances - Galaxy: disk - Galaxy: formation - Galaxy: evolution

Simbad objects: 28

goto Full paper

goto View the reference in ADS

Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 85 Peg SB* 00 02 10.3411392575 +27 04 54.476788744 6.47 6.42 5.75 5.16 4.73 G5VbFe-2 529 0
2 HD 967 PM* 00 14 04.4786001592 -11 18 41.705975952   8.99 8.38     G6wF7 75 0
3 HD 17548 PM* 02 48 51.8532992837 -01 30 34.766609862   8.66 8.18     F7/G0(V) 79 0
4 HD 17820 PM* 02 51 58.3549892835 +11 22 11.936962577 8.85 8.92   8.0   G5 101 0
5 HD 107582 SB* 12 21 28.1422728947 +61 44 50.169472993   8.81   7.9   G3 73 0
6 BD+73 566 PM* 12 42 00.1420626002 +72 57 50.492759189   9.88   8.9   G3 42 0
7 BD+19 2646 PM* 13 11 48.3116659724 +18 22 44.841276120   10.53   9.4   G1 53 0
8 HD 114762 SB* 13 12 19.7467346230 +17 31 01.611425890 7.78         F9VgF8mF4+M6?V 518 1
9 HD 117858 PM* 13 32 30.9718568183 +36 02 06.456921789   8.54   7.6   G0 52 0
10 BD+13 2698 ** 13 39 59.57275 +12 35 21.6837   9.94   9.0   F9V 79 0
11 BD+77 521 PM* 13 44 27.1737639043 +77 13 50.851708130   10.05   9.0   G5 27 0
12 HD 126512 PM* 14 25 30.1203516561 +20 35 24.574602350   7.89   6.9   G0 104 0
13 HD 131597 PM* 14 52 51.5883442691 +48 28 06.374375812       7.9   G0 43 1
14 BD+67 925 PM* 16 05 20.5335121812 +66 47 22.304888759   10.44   9.5   G2wl 42 0
15 HD 150177 PM* 16 39 39.1297665715 -09 33 16.513863824   6.794 6.332     F6V 140 0
16 HD 159307 PM* 17 34 08.4273732832 -03 03 20.168620430   7.84 7.39     F3V 77 0
17 HD 159482 PM* 17 34 43.0846515269 +06 00 51.750931202   8.95   8.0   G0V 148 0
18 * b Her SB* 18 07 01.53971 +30 33 43.6896 5.52 5.59 5.07 4.61 4.28 F7VgF7mF5 422 0
19 HD 170737 SB* 18 29 54.1033084231 +26 39 26.406770362 9.25 8.90 8.08     G8III-IV 69 0
20 HD 174912 PM* 18 51 25.1794717878 +38 37 35.652070012       6.8   F8 109 0
21 G 125-13 PM* 19 31 09.2289639431 +36 09 10.174838318   10.68   9.9   sdF7 64 0
22 HD 201889 ** 21 11 59.52350 +24 10 05.3897 8.60 8.64 8.05 7.52 7.15 G1V 150 0
23 HD 204521 PM* 21 25 16.7970673436 +70 28 39.141230417   7.87 7.29     G0V_Fe-0.8 49 0
24 HD 204848 PM* 21 31 34.3639707904 -09 44 40.913926246   8.25 7.40     G8V 30 0
25 * 15 Peg PM* 21 52 29.9167067804 +28 47 36.751682373 5.82 5.95 5.53     F2V 229 0
26 HD 212029 SB* 22 20 23.8650976244 +46 25 05.823238138       8.2   G0 47 0
27 HD 222794 ** 23 43 27.0430855750 +58 04 49.070684231   7.77   6.8   G2V 75 0
28 NAME Arcturus Stream MGr ~ ~           ~ 67 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2013A&A...555A...6S and select 'bookmark this link' or equivalent in the popup menu


2021.03.02-23:26:00

© Université de Strasbourg/CNRS

    • Contact