2011A&A...535A..42T


Query : 2011A&A...535A..42T

2011A&A...535A..42T - Astronomy and Astrophysics, volume 535A, 42-42 (2011/11-1)

Analysis of old very metal rich stars in the solar neighbourhood.

TREVISAN M., BARBUY B., ERIKSSON K., GUSTAFSSON B., GRENON M. and POMPEIA L.

Abstract (from CDS):

A sample of mostly old metal-rich dwarf and turn-off stars with high eccentricity and low maximum height above the Galactic plane has been identified. From their kinematics, it was suggested that the inner disk is their most probable birthplace. Their chemical imprints may therefore reveal important information about the formation and evolution of the still poorly understood inner disk. To probe the formation history of these stellar populations, a detailed analysis of a sample of very metal-rich stars is carried out. We derive the metallicities, abundances of α elements, ages, and Galactic orbits. The analysis of 71 metal-rich stars is based on optical high-resolution echelle spectra obtained with the FEROS spectrograph at the ESO 1.52-m Telescope at La Silla, Chile. The metallicities and abundances of C, O, Mg, Si, Ca, and Ti were derived based on LTE detailed analysis, employing the MARCS model atmospheres. We confirm the high metallicity of these stars reaching up to [FeI/H]=0.58, and the sample of metal-rich dwarfs can be kinematically subclassified in samples of thick disk, thin disk, and intermediate stellar populations. All sample stars show solar α-Fe ratios, and most of them are old and still quite metal rich. The orbits suggest that the thin disk, thick disk and intermediate populations were formed at Galactocentric distances of ∼8kpc, ∼6kpc, and ∼7kpc, respectively. The mean maximum height of the thick disk subsample of Zmax∼380pc, is lower than for typical thick disk stars. A comparison of α-element abundances of the sample stars with bulge stars shows that the oxygen is compatible with a bulge or inner thick disk origin. Our results suggest that models of radial mixing and dynamical effects of the bar and bar/spiral arms might explain the presence of these old metal-rich dwarf stars in the solar neighbourhood.

Abstract Copyright:

Journal keyword(s): stars: abundances - solar neighborhood - stars: atmospheres

VizieR on-line data: <Available at CDS (J/A+A/535/A42): tablea1.dat tablea2.dat tablea3.dat tablea4.dat abund.dat kinem.dat refs.dat>

Simbad objects: 79

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Number of rows : 79
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 CD-32 327 PM* 00 50 14.7476163264 -31 19 57.977967612   11.44 10.50     ~ 13 0
2 BD-02 180 PM* 01 13 20.9288599920 -01 43 45.596478000   11.01 10.06     K0 20 0
3 HD 8389 PM* 01 23 02.6387118640 -12 57 57.844303470   8.74 7.84     K0VCN+2 96 0
4 HD 9174 PM* 01 30 01.0020741024 -19 36 16.207733484   9.14 8.37     G8IV 30 0
5 HD 9424 PM* 01 31 22.1659299081 -58 43 11.616943596   9.97 9.17     G8V 37 0
6 HD 10576 PM* 01 40 32.2390490328 -69 59 13.096455000   9.08 8.50     G0/1V 31 0
7 HD 11608 PM* 01 53 31.4441065584 -21 15 09.820414260   10.26 9.28     K1/2V 30 0
8 HD 12789 PM* 02 04 06.5014501200 -46 22 29.041555404   9.59 8.89     G8/K0III+F 18 0
9 HD 13386 PM* 02 10 08.0354080704 -31 04 11.530968528   9.79 8.91     K0V 46 0
10 HD 15133 PM* 02 25 32.8918930440 -28 59 15.653828220   10.26 9.31     K1III 18 0
11 HD 15555 RG* 02 29 34.0169251662 -24 06 14.271763531   8.39 7.34     K1III 41 0
12 HD 16905 PM* 02 40 03.1897395960 -61 21 15.279551388   10.46 9.46     K3V 30 0
13 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3185 0
14 HD 25061 PM* 03 56 25.2983410040 -52 55 51.126291999   10.11 9.26     K1V 56 0
15 HD 26151 PM* 04 07 20.7228981816 -27 25 32.379388428   9.34 8.50     K1V 59 0
16 HD 26794 PM* 04 14 30.2993352984 +03 01 19.389478656   9.78   8.2   K3V 75 0
17 HD 27894 PM* 04 20 47.0461066173 -59 24 39.024646358   10.42 9.42     K2V 72 1
18 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2844 0
19 HD 30295 PM* 04 42 19.9767596688 -61 37 14.492749008   9.60 8.83     K0/1V 39 0
20 HD 31452 PM* 04 56 10.6943726719 +02 56 03.038805588   9.28   7.8   G8/K0IV 56 0
21 HD 31827 PM* 04 56 18.3105842424 -51 02 51.049567320   9.03 8.24     G8IV 38 0
22 HD 35854 PM* 05 26 14.7380907720 -32 30 17.137639800 9.431 8.673 7.711 7.184 6.7 K2/3V 77 0
23 HD 37986 PM* 05 41 53.6865095232 -15 37 49.950691068   8.16 7.37     G8+VCN+1 95 0
24 HD 39213 PM* 05 49 16.4902898784 -37 30 48.043081692   9.79 8.93     K0V 34 0
25 HD 39715 PM* 05 54 28.5765205846 +02 08 32.041435253   9.86   8.1   K3V 81 0
26 HD 43848 PM* 06 16 31.3559942976 -40 31 54.827597100   9.57 8.64     K2IV 36 1
27 HD 77338 PM* 09 01 12.4934924904 -25 31 37.432543296   9.47 8.59     K0IV 60 1
28 G 161-29 PM* 09 25 42.4168171439 -06 46 19.443320826   12.49 11.29     ~ 18 0
29 HD 81767 PM* 09 27 09.2786581728 -16 39 43.132300200   10.41 9.47     K2(III) 32 0
30 HD 82943 PM* 09 34 50.7353072232 -12 07 46.369202196   7.17 6.53     F9VFe+0.5 432 2
31 HD 86065 PM* 09 55 42.5148077082 -18 06 26.664842067   10.31 9.34     K2.5V 43 0
32 HD 86249 PM* 09 56 12.5052306576 -40 47 13.082454420   9.96 8.98     K2.5V 49 0
33 HD 87007 PM* 10 01 58.5834562296 -10 24 19.411744716   9.60 8.73     K0V 35 0
34 HD 90054 PM* 10 23 43.4475962616 +02 37 09.632156484       7.5   F8V 39 0
35 HD 91585 PM* 10 33 57.1216216873 -29 32 00.677679524   10.33 9.42     K2V 23 0
36 HD 91669 PM* 10 34 54.4257484776 -13 47 16.624536036   10.62 9.70     K0/1III 20 0
37 HD 93800 PM* 10 49 31.6945155936 -06 46 10.495954272   10.00 9.10     K1III 27 0
38 HD 94374 PM* 10 53 22.5034546940 -14 22 28.213514211   10.21 9.25     K3V 22 0
39 HD 94371 * 10 53 53.8541486832 +20 31 59.728626048   9.27 8.87     F8 11 0
40 HD 95338 PM* 10 59 26.3040013933 -56 37 22.947342987   9.50 8.62     K1IV-V 50 0
41 HD 104212 PM* 12 00 03.3629024112 -46 47 03.087575268   9.04 8.38     G3V 49 0
42 HD 107509 PM* 12 21 44.4664587000 -61 32 19.488710256   8.49 7.92     F8V 35 0
43 HD 120329 PM* 13 50 16.3071580028 -57 15 43.124282827   9.08 8.34     G3/5V 36 0
44 HD 143102 PM* 16 01 12.7602644444 -56 41 41.732728891   8.62 7.88     G6IV/V 29 0
45 HD 148530 PM* 16 28 35.9491456781 +03 15 10.626401149   9.59   8.3   G8/K0V 58 0
46 HD 149256 PM* 16 35 06.7549909705 -36 03 42.004647384   9.26 8.40     G8IV 21 0
47 HD 149606 PM* 16 37 36.1132890770 -40 53 17.005865467   9.91 8.94     K2.5V 45 0
48 HD 149933 PM* 16 37 45.8502514028 +00 02 24.600012750       7.6   K0V 57 0
49 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12914 0
50 HD 165920 PM* 18 09 17.6784789024 -22 54 30.384803982   8.74 7.88     K1IV 55 0
51 HD 168714 PM* 18 24 14.5927918920 -55 03 20.606569992   9.66 8.89     G6III/IV 14 0
52 HD 171999 SB* 18 37 58.8187971885 -06 48 19.714925000   9.18 8.30 7.8   K0IV/V 77 1
53 HD 177374 PM* 19 04 45.0802503120 -07 27 21.670128108   10.38 9.40     K1V 17 0
54 HD 179764 PM* 19 14 12.0884537057 -09 58 17.619273774   9.82 9.05     K0V 20 0
55 HD 181234 PM* 19 20 00.0974335061 -09 19 24.952809813   9.44 8.59     G8IV 48 0
56 HD 180865 PM* 19 22 49.6663167268 -66 09 07.033273637   9.87 8.92     K2V 32 0
57 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 469 0
58 HD 181433 PM* 19 25 09.5666936172 -66 28 07.676956827   9.42 8.38     K3III-IV 113 1
59 BD-17 6035 PM* 20 36 53.3231766432 -16 45 54.970955028   11.38 10.143 10.128   K4V 21 0
60 HD 196397 PM* 20 37 25.5556964568 -11 52 15.815355276   9.78 8.95     G8/K0V 31 0
61 HD 196794 PM* 20 39 22.0506548605 +10 04 32.649286280   9.47   7.9   K2IV 33 0
62 HD 197921 PM* 20 49 10.1944692960 -54 46 39.850261904   10.20 9.25     K3V 40 0
63 HD 201237 PM* 21 08 41.6961978936 -19 59 41.420822640   11.33 10.15     K2(III) 20 0
64 HD 209721 PM* 22 08 22.5077890128 -69 17 13.076196144   10.32 9.49     G8IV/V 18 0
65 HD 211706 PM* 22 19 07.7662330368 -07 18 48.944142144   9.48 8.86     G2/3V 38 0
66 BD-05 5798 PM* 22 28 19.6222386576 -04 50 06.692358624   11.36 10.34     ~ 12 0
67 HD 213996 PM* 22 35 05.6669655346 +11 52 53.064616293       8.2   K2 42 0
68 HD 214463 PM* 22 38 47.9659821480 -30 12 37.203680808   10.60 9.61     K1III/IV 17 0
69 CD-40 15036 PM* 23 08 31.2728325456 -39 22 33.172909608   10.90 10.04     ~ 14 0
70 HD 218566 PM* 23 09 10.7269903047 -02 15 38.682667763   9.641 9.208 9.105 8.73 K3V 94 1
71 HD 218750 PM* 23 11 01.5284581402 -50 58 06.392726320   10.16 9.26     K1V 52 0
72 HD 221313 PM* 23 31 17.2440029808 -33 04 34.589839620   10.76 9.83     K1(III) 18 0
73 HD 221974 PM* 23 36 45.7795621080 -17 14 12.487740684   10.21 9.33     K1III 50 0
74 HD 224230 PM* 23 56 10.2725648568 -72 00 07.843357584   10.91 9.94     K3(V) 30 0
75 HD 224383 PM* 23 57 33.5181718097 -09 38 51.070746906   8.51 7.88     G3V 109 0
76 NAME Galactic Bar reg ~ ~           ~ 1041 0
77 NAME Hercules Stream MGr ~ ~           ~ 208 0
78 NAME Sirius Moving Group MGr ~ ~           ~ 92 0
79 NAME Galactic Bulge reg ~ ~           ~ 3848 0

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2022.05.28-10:36:48

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