2015A&A...580A.111L


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.05CEST00:04:42

2015A&A...580A.111L - Astronomy and Astrophysics, volume 580A, 111-111 (2015/8-1)

The nature of the KFR08 stellar stream. A chemical tagging experiment.

LIU C., FELTZING S. and RUCHTI G.

Abstract (from CDS):

The origin of the new kinematically identified metal-poor stellar stream, the KFR08 stream, has not been established to date. We present stellar parameters, stellar ages, and detailed elemental abundances for Na, Mg, Al, Si, Ca, Sc, Ti, Cr, Ni, Zn, Sr, Y, Zr, Ba, La, and Eu for 16 KFR08 stream members based on an analysis of high-resolution spectra. Based on the abundance ratios of 14 elements, we use the chemical tagging method to identify the stars with the same chemical composition that therefore might have a common birthplace, such as a cluster. Although three stars were tagged with similar elemental abundances ratios, we find that, statistically, it is not certain that they originate from a dissolved star cluster. This conclusion is consistent with the large dispersion of [Fe/H] (σ[Fe/H]=0.29) among the 16 stream members. We find that our stars are α enhanced and that the abundance patterns of the stream members match the thick-disc population well. In addition, most of the stream stars have estimated stellar ages greater than 11Gyr. These results, together with the hot kinematics of the stream stars, suggest that the KFR08 stream originated from the thick-disc population, which was perturbed by a massive merger in the early Universe.

Abstract Copyright:

Journal keyword(s): Galaxy: evolution - Galaxy: formation - Galaxy: disk - solar neighborhood - stars: abundances - stars: kinematics and dynamics

Status at CDS:  

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * mu. Cas SB* 01 08 16.39470 +54 55 13.2264 5.93 5.86 5.17 4.55 4.13 G5Vb 543 1
2 HD 278543 PM* 03 19 39.8517778722 +33 35 55.191557533   10.53   9.1   K2 41 0
3 HD 24616 PM* 03 53 59.4643160075 -23 08 13.471799885   7.52 6.71     G8IV/V 90 0
4 HD 281540 PM* 04 06 11.7611727436 +32 57 03.116980098       9.4   K4 52 0
5 HD 32147 PM* 05 00 48.9991346145 -05 45 13.220341956 8.27 7.27 6.21 5.36 4.87 K3+V 413 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14762 1
7 CD-43 6810 PM* 11 08 40.0960913641 -44 15 33.796755020   10.38 9.82     F8 53 0
8 Wolf 397 PM* 11 28 27.7469972554 +07 31 02.201645356   11.44   9.6   K5 41 0
9 HD 103912 PM* 11 58 00.0820225482 +48 12 12.438186701   9.25   7.8   G5V: 62 0
10 HD 104556 PM* 12 02 28.9158064308 +43 05 02.697980407   7.50   6.1   G8V 93 0
11 HD 104800 PM* 12 04 05.5627465798 +03 20 26.708766113   9.80   8.9   G3V 104 0
12 HD 106572 PM* 12 15 30.4491292043 -41 54 47.800174468   7.27 6.23     K0III 32 0
13 BD+02 2541 PM* 12 26 59.8614367203 +01 33 58.402203150   11.23   9.9   G3 44 0
14 HD 115577 PM* 13 18 23.4150629478 -28 19 57.070531008   7.76 6.82     K0III 40 0
15 HD 134113 SB* 15 07 46.5001038610 +08 52 47.210828867   8.83   7.9   F9 108 0
16 HD 149414 SB* 16 34 42.3556924921 -04 13 44.634894711 10.48 10.37 9.63     G5Ve 187 0
17 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11464 0
18 HD 161770 PM* 17 47 46.0757888339 -09 36 18.444031860 10.38 10.39 9.71 9.04 8.55 F3V 86 0
19 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1726 2
20 HD 223713 PM* 23 52 14.4301289840 -61 25 30.535410105   10.22 9.41     K3V(w) 42 0
21 CD-24 17889 * 23 52 29.7572619107 -24 09 56.189444807   10.803 10.124 9.8   ~ 16 0
22 NAME Galactic Bar reg ~ ~           ~ 885 0
23 NAME Hercules Stream MGr ~ ~           ~ 182 0
24 NAME Arcturus Stream MGr ~ ~           ~ 64 1

    Equat.    Gal    SGal    Ecl

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2020.06.05-00:04:42

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