2010A&A...513A..35A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST22:39:32

2010A&A...513A..35A - Astronomy and Astrophysics, volume 513, A35-35 (2010/4-1)

Chemical similarities between Galactic bulge and local thick disk red giants: O, Na, Mg, Al, Si, Ca, and Ti.

ALVES-BRITO A., MELENDEZ J., ASPLUND M., RAMIREZ I. and YONG D.

Abstract (from CDS):

The formation and evolution of the Galactic bulge and its relationship with the other Galactic populations is still poorly understood. To establish the chemical differences and similarities between the bulge and other stellar populations, we performed an elemental abundance analysis of α- (O, Mg, Si, Ca, and Ti) and Z-odd (Na and Al) elements of red giant stars in the bulge as well as of local thin disk, thick disk and halo giants. We use high-resolution optical spectra of 25 bulge giants in Baade's window and 55 comparison giants (4 halo, 29 thin disk and 22 thick disk giants) in the solar neighborhood. All stars have similar stellar parameters but cover a broad range in metallicity (-1.5<[Fe/H]< +0.5). A standard 1D local thermodynamic equilibrium analysis using both Kurucz and MARCS models yielded the abundances of O, Na, Mg, Al, Si, Ca, Ti and Fe. Our homogeneous and differential analysis of the Galactic stellar populations ensured that systematic errors were minimized. We confirm the well-established differences for [α/Fe] at a given metallicity between the local thin and thick disks. For all the elements investigated, we find no chemical distinction between the bulge and the local thick disk, in agreement with our previous study of C, N and O but in contrast to other groups relying on literature values for nearby disk dwarf stars. For -1.5<[Fe/H]←0.3 exactly the same trend is followed by both the bulge and thick disk stars, with a star-to-star scatter of only 0.03dex. Furthermore, both populations share the location of the knee in the [α/Fe] vs. [Fe/H] diagram. It still remains to be confirmed that the local thick disk extends to super-solar metallicities as is the case for the bulge. These are the most stringent constraints to date on the chemical similarity of these stellar populations. Our findings suggest that the bulge and local thick disk stars experienced similar formation timescales, star formation rates and initial mass functions, confirming thus the main outcomes of our previous homogeneous analysis of [O/Fe] from infrared spectra for nearly the same sample. The identical α-enhancements of thick disk and bulge stars may reflect a rapid chemical evolution taking place before the bulge and thick disk structures we see today were formed, or it may reflect Galactic orbital migration of inner disk/bulge stars resulting in stars in the solar neighborhood with thick-disk kinematics.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/513/A35): stars.dat linelist.dat>

Simbad objects: 83

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Number of rows : 83

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 HD 787 PM* 00 12 09.9850054049 -17 56 17.699314201   6.740 5.265     K4III 86 0
2 * eps And PM* 00 38 33.3473333007 +29 18 42.328589821 5.72 5.25 4.38 3.70 3.19 G7IIIFe-3CH1 259 0
3 * 21 Cet PM* 00 54 17.5931893601 -08 44 26.390882036   7.086 6.161     G8III 71 0
4 * rho For RG* 03 47 56.0407172208 -30 10 04.380679097   6.52 5.54     G6III 53 0
5 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1178 1
6 * l Eri ** 04 38 10.8240964091 -14 18 14.483465432 5.99 4.96 3.87 3.03 2.47 K2-IIIb 125 0
7 * zet Cae PM* 04 47 49.5771667418 -30 01 13.336696826   7.432 6.346     K0III 21 0
8 * eta Men PM* 04 55 11.2005259004 -74 56 12.676642091   6.965 5.449     K4III 34 0
9 * gam Men PM* 05 31 52.8319580262 -76 20 27.289492999 7.52 6.33 5.20 4.34 3.78 K2III 87 0
10 * 36 Dor PM* 05 54 06.0563264677 -63 05 23.196262583   5.70 4.66     K2III-IV 96 0
11 HD 41667 PM* 06 05 03.6442370627 -32 59 38.725804168   9.49 8.52     G8V 37 0
12 HD 45415 * 06 27 20.4500881358 +02 54 29.847678425   6.576 5.543     G8III 62 0
13 * tet CMa PM* 06 54 11.3997692336 -12 02 19.061054441 7.20 5.51 4.08 2.95 2.17 K3/4III 207 0
14 HD 73017 PM* 08 38 22.1848684056 +53 24 05.552032253   6.609 5.645     G9III 39 0
15 HD 77236 PM* 09 01 14.7953805495 -02 33 41.692617410   8.65 7.51     K0III 51 0
16 HD 77729 * 09 05 04.7198962616 +26 09 53.128109419   9.06 7.62 11.4   K4III 30 0
17 HD 78050 PM* 09 06 42.9265021965 +20 30 35.497351189   9.104   7.2   G0 61 0
18 HD 80811 PM* 09 22 12.9588830827 +12 32 56.768365603   9.22   7.8   K0 33 0
19 HD 83212 Pe* 09 36 19.9520860588 -20 53 14.744519420   9.582 9.177 7.83   G6/K0IIIwF7 117 0
20 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 401 0
21 * tau Leo * 11 27 56.2400660284 +02 51 22.562494014   5.940 4.943     G8-IIIa 118 0
22 HD 99978 Pe* 11 29 37.2854929734 -55 53 44.705656859   9.56 8.61     G5/8(III) 27 0
23 * ups Leo * 11 36 56.9308590 -00 49 25.496304 6.05 5.31 4.30 3.58 3.06 G9IIIbFe-0.5 120 0
24 * c Vir PM* 12 20 20.9813348 +03 18 45.260365 7.27 6.12 4.96 4.07 3.46 K0.5IIIbFe-0.5 335 0
25 HD 107773 PM* 12 23 13.8898030808 -67 37 53.571991020   7.25 6.39     G8/K0IV 40 0
26 HD 114095 PM* 13 08 25.7889576933 -07 18 30.456099608   9.611 9.008     G8V 57 0
27 HD 115478 * 13 17 15.6282353768 +13 40 32.700484933 8.130 6.630 5.330     K3III 65 0
28 * 69 Vir PM* 13 27 27.1634806205 -15 58 24.897986472   5.850 4.750     K0III-IIIbCN1.5CH0.5 109 0
29 HD 117220 PM* 13 29 35.5671744235 -37 33 35.815376744   9.83 9.04     G5w 36 0
30 * h Vir PM* 13 32 58.0721498 -10 09 54.009115   6.17 5.21     G8III 73 0
31 HD 119971 PM* 13 47 38.5388819141 -50 19 14.475552763   6.791 5.446     K2III 34 0
32 * 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 2133 0
33 * g Boo PM* 14 28 37.8130531842 +49 50 41.461096501   6.44   5.1   G4III-IVFe-1 94 0
34 HD 128188 Pe* 14 35 46.8216841520 -11 24 12.261262320   10.9 9.94     G8(w) 29 0
35 * 11 Lib PM* 14 51 01.0727295 -02 17 56.948789 6.64 5.92 4.94     K0III/IV 119 0
36 * 18 Lib PM* 14 58 53.5812868287 -11 08 38.458110735   7.146 5.857     K3-IIICN2 112 0
37 HD 136014 PM* 15 19 31.7205806277 -37 05 49.772625381   7.142 6.178     G8III/IV 26 0
38 HD 142948 * 16 00 02.4132089575 -53 51 05.405086156   8.96 8.03     G5III/IV 43 0
39 HD 145148 PM* 16 09 11.2152519637 +06 22 43.291224462   6.97   5.3   K1.5IV 159 0
40 HD 148451 PM* 17 15 59.2323845430 -87 33 58.583855463   7.487 6.595     G5III 19 0
41 Cl* NGC 6522 ARP 4167 * 18 03 22.5157128117 -29 59 25.112016303   18.52 16.883   14.982 ~ 22 0
42 ISOGAL-P J180323.6-300159 AB* 18 03 23.5581380761 -30 01 59.006808411     13.804   11.744 ~ 32 0
43 [B86] 52 RG* 18 03 28.2444647360 -30 04 10.996370714     16.027   14.015 M1 24 0
44 Cl* NGC 6522 ARP 4072 * 18 03 28.3934347188 -29 59 58.009769323     16.308   14.376 ~ 17 0
45 Cl* NGC 6522 ARP 4329 * 18 03 28.4319214113 -29 58 41.692167635     15.110 14.58 13.282 ~ 27 0
46 Cl* NGC 6522 ARP 4325 * 18 03 28.9774065122 -29 58 46.319170479   18.31 16.718   14.989 ~ 10 0
47 Cl* NGC 6522 ARP 3220 * 18 03 30.5127688666 -30 05 25.150579901   18.08 16.594   14.772 ~ 8 0
48 NAME Baade Window reg 18 03.5 -30 01           ~ 528 3
49 Cl* NGC 6522 ARP 4003 * 18 03 33.3596773383 -29 58 12.329056445   16.70 15.087   13.380 ~ 19 0
50 Cl* NGC 6522 ARP 4047 * 18 03 34.4522090425 -29 59 46.818681658   18.34 16.837   15.195 ~ 8 0
51 [B86] 91 RG* 18 03 35.7608188467 -29 58 35.436931820     15.725   13.929 M1 23 0
52 Cl* NGC 6522 ARP 1025 * 18 03 35.8047191817 -29 59 03.483533701   18.52 16.763   14.824 ~ 15 0
53 Cl* NGC 6522 ARP 1039 * 18 03 36.4212840792 -29 59 15.248825113     16.894   15.051 ~ 14 0
54 OGLE BLG-LPV-194566 LP* 18 03 38.1855792929 -30 00 51.625818438     14.303   12.481 ~ 16 0
55 Cl* NGC 6522 ARP 1141 * 18 03 41.8872071602 -30 00 04.280423183   17.40 15.876   14.025 ~ 19 0
56 Cl* NGC 6522 ARP 1152 * 18 03 42.9714969269 -29 59 43.829940735   18.19 16.747   15.488 ~ 8 0
57 Cl* NGC 6522 ARP 1151 RG* 18 03 43.1976235635 -29 59 40.549704869   17.28 15.914   14.247 ~ 19 0
58 Cl* NGC 6522 ARP 1156 * 18 03 44.2815768362 -29 59 34.340073480   17.47 16.08   14.187 ~ 12 0
59 Cl* NGC 6522 ARP 1158 * 18 03 44.4373312495 -29 59 38.368725182     16.463   14.742 ~ 8 0
60 Cl* NGC 6522 ARP 2172 * 18 03 44.7607496937 -30 03 38.238009222   18.46 16.911   15.088 ~ 8 0
61 Cl* NGC 6522 ARP 1194 * 18 03 48.5740687453 -29 59 31.139659529     16.114   14.182 ~ 17 0
62 Cl* NGC 6522 ARP 2119 * 18 03 49.3860060164 -30 02 44.121956663     15.678 15.25 13.965 ~ 13 0
63 Cl* NGC 6522 ARP 1322 RG* 18 03 49.3866213216 -30 01 54.191241971   16.46 14.467   12.532 ~ 29 0
64 Cl* NGC 6522 ARP 1202 * 18 03 49.8870894827 -30 00 08.464052089     15.804 15.25 13.963 ~ 16 0
65 Cl* NGC 6522 ARP 2154 * 18 03 51.7461622789 -30 03 18.243882803     16.545   14.811 ~ 7 0
66 [B86] 174 RG* 18 03 53.4249271407 -30 02 08.608987311     15.477 14.93 13.610 M2 13 0
67 HD 171496 * 18 36 07.4934207098 -24 26 11.312599970   9.59 8.52     G8IV 65 1
68 HD 172223 PM* 18 41 30.6797702769 -48 05 40.877768700   7.685 6.454     K2III/IVCNII 15 0
69 * 29 Sgr V* 18 49 40.1097012515 -20 19 28.783475235   6.615 5.210     K2III 32 0
70 HD 175219 * 18 56 16.9504360463 -42 42 38.420933900   6.341 5.346     K0III 21 0
71 HD 180928 PM* 19 19 00.0954907407 -15 32 11.650001328 9.06 7.49 6.06 4.94 4.11 K4III 88 0
72 HD 186378 * 19 42 59.1389588207 +27 24 30.607397747   8.38 7.20     K2II-III 13 0
73 HD 187195 * 19 49 02.2035774449 -10 52 14.777785948 8.64 7.28 6.04     K2III 36 0
74 * 34 Vul PM* 21 21 04.3941636370 +23 51 21.472506344   6.62   4.9   K1III 108 0
75 HD 210295 PM* 22 09 41.4458820463 -13 36 19.476747948   10.49 10.10     Gwl 79 0
76 HD 211075 * 22 14 20.0384985219 +18 01 13.373166354   9.43 8.21     K2 25 0
77 HD 212320 * 22 23 32.1522053137 -07 11 39.893279947   6.913 5.907     G8Ib/II(w) 59 0
78 * kap Aqr PM* 22 37 45.3804916 -04 13 40.993883   6.174 5.030     K1.5IIIbCN0.5 77 0
79 HD 215030 PM* 22 41 36.0509277162 +41 32 56.844705345 7.650 6.940   5.3   G9III 45 0
80 * gam Psc PM* 23 17 09.9374911 +03 16 56.237975 5.20 4.62 3.70 2.98 2.47 G9III:Fe-2 250 0
81 HD 221148 PM* 23 29 32.0811959294 -04 31 57.881823844   7.34 6.25     K3-IIIbFe2 130 0
82 * 14 And PM* 23 31 17.4127253191 +39 14 10.310491330   6.24   4.6   G8III 157 1
83 NAME Galactic Bulge reg ~ ~           ~ 3391 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-22:39:32

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