2012A&A...541A.157S


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET02:16:23

2012A&A...541A.157S - Astronomy and Astrophysics, volume 541A, 157-157 (2012/5-1)

Stellar substructures in the solar neighbourhood. I. Kinematic group 3 in the Geneva-Copenhagen survey.

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

Abstract (from CDS):

Galactic archeology is a powerful tool for investigating the formation and evolution of the Milky Way. We use this technique to study kinematic groups of F- and G-stars in the solar neighbourhood. From correlations between orbital parameters, three new coherent groups of stars were recently identified and suggested to correspond to remnants of disrupted satellites. We determine detailed elemental abundances in stars belonging to one of these groups and compare their chemical composition with Galactic disc stars. The aim is to look for possible chemical signatures that might give information about the history of this kinematic group of stars. High-resolution spectra were obtained with the FIES spectrograph at the Nordic Optical Telescope, La Palma, and analysed with a differential model atmosphere method. Comparison stars were observed and analysed with the same method. The average value of [Fe/H] for the 20 stars investigated in this study is -0.69±0.05dex. Elemental abundances of oxygen and α-elements are overabundant in comparison with Galactic thin-disc dwarfs and thin-disc chemical evolution models. This abundance pattern has similar characteristics as the Galactic thick-disc. The homogeneous chemical composition together with the kinematic properties and ages of stars in the investigated Group 3 of the Geneva-Copenhagen survey provides evidence of their common origin and possible relation to an ancient merging event. The similar chemical composition of stars in the investigated group and the thick-disc stars might suggest that their formation histories are linked.

Abstract Copyright:

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

Simbad objects: 35

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Number of rows : 35

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 74 0
3 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11155 1
4 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 195 0
5 HD 17548 PM* 02 48 51.8532992837 -01 30 34.766609862   8.66 8.18     F7/G0(V) 78 0
6 HD 17820 PM* 02 51 58.3549892835 +11 22 11.936962577 8.85 8.92   8.0   G5 100 0
7 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 192 1
8 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 318 0
9 NGC 4013 GiG 11 58 31.417 +43 56 49.28   12.4       ~ 376 1
10 HD 107582 SB* 12 21 28.1422728947 +61 44 50.169472993   8.81   7.9   G3 72 0
11 BD+73 566 PM* 12 42 00.1420626002 +72 57 50.492759189   9.88   8.9   G3 42 0
12 BD+19 2646 PM* 13 11 48.3116659724 +18 22 44.841276120   10.53   9.4   G1 52 0
13 HD 114762 SB* 13 12 19.7467346230 +17 31 01.611425890 7.78         F9VgF8mF4+M6?V 516 1
14 HD 117858 PM* 13 32 30.9718568183 +36 02 06.456921789   8.54   7.6   G0 51 0
15 BD+13 2698 ** 13 39 59.57275 +12 35 21.6837   9.94   9.0   F9V 79 0
16 BD+77 521 PM* 13 44 27.1737639043 +77 13 50.851708130   10.05   9.0   G5 26 0
17 HD 126512 PM* 14 25 30.1203516561 +20 35 24.574602350   7.89   6.9   G0 103 0
18 HD 131597 PM* 14 52 51.5883442691 +48 28 06.374375812       7.9   G0 42 1
19 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 697 1
20 BD+67 925 PM* 16 05 20.5335121812 +66 47 22.304888759   10.44   9.5   G2wl 41 0
21 HD 150177 PM* 16 39 39.1297665715 -09 33 16.513863824   6.794 6.332     F6V 139 0
22 HD 159307 PM* 17 34 08.4273732832 -03 03 20.168620430   7.84 7.39     F3V 76 0
23 HD 159482 PM* 17 34 43.0846515269 +06 00 51.750931202   8.95   8.0   G0V 147 0
24 * b Her SB* 18 07 01.53971 +30 33 43.6896 5.52 5.59 5.07 4.61 4.28 F7VgF7mF5 421 0
25 HD 170737 SB* 18 29 54.1033084231 +26 39 26.406770362 9.25 8.90 8.08     G8III-IV 68 0
26 HD 174912 PM* 18 51 25.1794717878 +38 37 35.652070012       6.8   F8 108 0
27 G 125-13 PM* 19 31 09.2289639431 +36 09 10.174838318   10.68   9.9   sdF7 63 0
28 HD 201889 ** 21 11 59.52350 +24 10 05.3897 8.60 8.64 8.05 7.52 7.15 G1V 150 0
29 HD 204521 PM* 21 25 16.7970673436 +70 28 39.141230417   7.87 7.29     G0V_Fe-0.8 48 0
30 HD 204848 PM* 21 31 34.3639707904 -09 44 40.913926246   8.25 7.40     G8V 29 0
31 * 15 Peg PM* 21 52 29.9167067804 +28 47 36.751682373 5.82 5.95 5.53     F2V 227 0
32 HD 212029 SB* 22 20 23.8650976244 +46 25 05.823238138       8.2   G0 46 0
33 HD 222794 ** 23 43 27.0430855750 +58 04 49.070684231   7.77   6.8   G2V 74 0
34 NAME Orphan Stream St* ~ ~           ~ 201 0
35 NAME Monoceros Stream St* ~ ~           ~ 323 0

    Equat.    Gal    SGal    Ecl

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2021.01.24-02:16:23

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