2008A&A...484L..21M


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.06CEST07:47:37

2008A&A...484L..21M - Astronomy and Astrophysics, volume 484, L21-25 (2008/6-4)

Chemical similarities between Galactic bulge and local thick disk red giant stars.

MELENDEZ J., ASPLUND M., ALVES-BRITO A., CUNHA K., BARBUY B., BESSELL M.S., CHIAPPINI C., FREEMAN K.C., RAMIREZ I., SMITH V.V. and YONG D.

Abstract (from CDS):

The evolution of the Milky Way bulge and its relationship with the other Galactic populations is still poorly understood. The bulge has been suggested to be either a merger-driven classical bulge or the product of a dynamical instability of the inner disk. To probe the star formation history, the initial mass function and stellar nucleosynthesis of the bulge, we performed an elemental abundance analysis of bulge red giant stars. We also completed an identical study of local thin disk, thick disk and halo giants to establish the chemical differences and similarities between the various populations. High-resolution infrared spectra of 19 bulge giants and 49 comparison giants in the solar neighborhood were acquired with Gemini/Phoenix. All stars have similar stellar parameters but cover a broad range in metallicity. A standard 1D local thermodynamic equilibrium analysis yielded the abundances of C, N, O and Fe. A homogeneous and differential analysis of the bulge, halo, thin disk and thick disk stars ensured that systematic errors were minimized. We confirm the well-established differences for [O/Fe] (at a given metallicity) between the local thin and thick disks. For the elements investigated, we find no chemical distinction between the bulge and the local thick disk, which is in contrast to previous studies relying on literature values for disk dwarf stars in the solar neighborhood. Our findings suggest that the bulge and local thick disk experienced similar, but not necessarily shared, chemical evolution histories. We argue that their formation timescales, star formation rates and initial mass functions were similar.

Abstract Copyright:

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

Status at CDS:  

Simbad objects: 70

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Number of rows : 70

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 85 0
2 * 21 Cet PM* 00 54 17.5931893601 -08 44 26.390882036   7.086 6.161     G8III 70 0
3 * lam Tuc RG* 00 55 00.3112900792 -69 31 37.502465642   6.537 5.454     K2III 46 0
4 HD 8724 PM* 01 26 17.5944981072 +17 07 35.123836665   9.29 8.34     G5 104 0
5 * alf Cet LP? 03 02 16.77307 +04 05 23.0596 6.10 4.17 2.53 1.18 0.02 M1.5IIIa 438 0
6 * rho For RG* 03 47 56.0407172208 -30 10 04.380679097   6.52 5.54     G6III 52 0
7 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1177 1
8 * l Eri ** 04 38 10.8240964091 -14 18 14.483465432 5.99 4.96 3.87 3.03 2.47 K2-IIIb 125 0
9 * zet Cae PM* 04 47 49.5771667418 -30 01 13.336696826   7.432 6.346     K0III 21 0
10 * eta Men PM* 04 55 11.2005259004 -74 56 12.676642091   6.965 5.449     K4III 34 0
11 * gam Men PM* 05 31 52.8319580262 -76 20 27.289492999 7.52 6.33 5.20 4.34 3.78 K2III 87 0
12 HD 40409 PM* 05 54 06.0563264677 -63 05 23.196262583   5.70 4.66     K2III-IV 96 0
13 HD 41667 PM* 06 05 03.6442370627 -32 59 38.725804168   9.49 8.52     G8V 37 0
14 * 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
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 60 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 * tau Leo * 11 27 56.2400660284 +02 51 22.562494014   5.940 4.943     G8-IIIa 118 0
21 HD 99978 Pe* 11 29 37.2854929734 -55 53 44.705656859   9.56 8.61     G5/8(III) 27 0
22 * 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
23 * 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
24 HD 107773 PM* 12 23 13.8898030808 -67 37 53.571991020   7.25 6.39     G8/K0IV 40 0
25 HD 114095 PM* 13 08 25.7889576933 -07 18 30.456099608   9.611 9.008     G8V 56 0
26 HD 115478 * 13 17 15.6282353768 +13 40 32.700484933 8.130 6.630 5.330     K3III 65 0
27 * 69 Vir PM* 13 27 27.1634806205 -15 58 24.897986472   5.850 4.750     K0III-IIIbCN1.5CH0.5 108 0
28 * h Vir PM* 13 32 58.0721498 -10 09 54.009115   6.17 5.21     G8III 73 0
29 HD 119971 PM* 13 47 38.5388819141 -50 19 14.475552763   6.791 5.446     K2III 34 0
30 * 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 2125 0
31 HD 128188 Pe* 14 35 46.8216841520 -11 24 12.261262320   10.9 9.94     G8(w) 29 0
32 * 11 Lib PM* 14 51 01.0727295 -02 17 56.948789 6.64 5.92 4.94     K0III/IV 119 0
33 * 18 Lib PM* 14 58 53.5812868287 -11 08 38.458110735   7.146 5.857     K3-IIICN2 112 0
34 HD 136014 PM* 15 19 31.7205806277 -37 05 49.772625381   7.142 6.178     G8III/IV 26 0
35 HD 142948 * 16 00 02.4132089575 -53 51 05.405086156   8.96 8.03     G5III/IV 43 0
36 HD 145148 PM* 16 09 11.2152519637 +06 22 43.291224462   6.97   5.3   K1.5IV 158 0
37 Cl* NGC 6522 ARP 4167 * 18 03 22.5157128117 -29 59 25.112016303   18.52 16.883   14.982 ~ 22 0
38 ISOGAL-P J180323.6-300159 AB* 18 03 23.5581380761 -30 01 59.006808411     13.804   11.744 ~ 32 0
39 [B86] 52 RG* 18 03 28.2444647360 -30 04 10.996370714     16.027   14.015 M1 24 0
40 Cl* NGC 6522 ARP 4072 * 18 03 28.3934347188 -29 59 58.009769323     16.308   14.376 ~ 17 0
41 Cl* NGC 6522 ARP 4329 * 18 03 28.4319214113 -29 58 41.692167635     15.110 14.58 13.282 ~ 27 0
42 Cl* NGC 6522 ARP 4325 * 18 03 28.9774065122 -29 58 46.319170479   18.31 16.718   14.989 ~ 10 0
43 NAME Baade Window reg 18 03.5 -30 01           ~ 527 3
44 Cl* NGC 6522 ARP 4003 * 18 03 33.3596773383 -29 58 12.329056445   16.70 15.087   13.380 ~ 19 0
45 [B86] 91 RG* 18 03 35.7608188467 -29 58 35.436931820     15.725   13.929 M1 23 0
46 Cl* NGC 6522 ARP 1025 * 18 03 35.8047191817 -29 59 03.483533701   18.52 16.763   14.824 ~ 15 0
47 OGLE BLG-LPV-194566 LP* 18 03 38.1855792929 -30 00 51.625818438     14.303   12.481 ~ 16 0
48 Cl* NGC 6522 ARP 1141 * 18 03 41.8872071602 -30 00 04.280423183   17.40 15.876   14.025 ~ 19 0
49 Cl* NGC 6522 ARP 1151 RG* 18 03 43.1976235635 -29 59 40.549704869   17.28 15.914   14.247 ~ 19 0
50 Cl* NGC 6522 ARP 1156 * 18 03 44.2815768362 -29 59 34.340073480   17.47 16.08   14.187 ~ 12 0
51 Cl* NGC 6522 ARP 1158 * 18 03 44.4373312495 -29 59 38.368725182     16.463   14.742 ~ 8 0
52 Cl* NGC 6522 ARP 1194 * 18 03 48.5740687453 -29 59 31.139659529     16.114   14.182 ~ 17 0
53 Cl* NGC 6522 ARP 1322 RG* 18 03 49.3866213216 -30 01 54.191241971   16.46 14.467   12.532 ~ 29 0
54 Cl* NGC 6522 ARP 1202 * 18 03 49.8870894827 -30 00 08.464052089     15.804 15.25 13.963 ~ 16 0
55 [B86] 174 RG* 18 03 53.4249271407 -30 02 08.608987311     15.477 14.93 13.610 M2 13 0
56 V* V4307 Sgr RR* 18 10 30.70 -31 23 11.4     16.546   15.595 ~ 7 0
57 HD 171496 * 18 36 07.4934207098 -24 26 11.312599970   9.59 8.52     G8IV 65 1
58 HD 172223 PM* 18 41 30.6797702769 -48 05 40.877768700   7.685 6.454     K2III/IVCNII 15 0
59 HD 175219 * 18 56 16.9504360463 -42 42 38.420933900   6.341 5.346     K0III 21 0
60 HD 180928 PM* 19 19 00.0954907407 -15 32 11.650001328 9.06 7.49 6.06 4.94 4.11 K4III 87 0
61 HD 186378 * 19 42 59.1389588207 +27 24 30.607397747   8.38 7.20     K2II-III 13 0
62 HD 187195 * 19 49 02.2035774449 -10 52 14.777785948 8.64 7.28 6.04     K2III 35 0
63 * 34 Vul PM* 21 21 04.3941636370 +23 51 21.472506344   6.62   4.9   K1III 108 0
64 HD 206642 PM* 21 44 29.4719964224 -38 33 09.104962185   7.418 6.283     K1IIICNIV/V 35 0
65 HD 210295 PM* 22 09 41.4458820463 -13 36 19.476747948   10.49 10.10     Gwl 79 0
66 HD 211075 * 22 14 20.0384985219 +18 01 13.373166354   9.43 8.21     K2 25 0
67 * kap Aqr PM* 22 37 45.3804916 -04 13 40.993883   6.174 5.030     K1.5IIIbCN0.5 77 0
68 * 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
69 HD 221148 PM* 23 29 32.0811959294 -04 31 57.881823844   7.34 6.25     K3-IIIbFe2 129 0
70 NAME Galactic Bulge reg ~ ~           ~ 3369 0

    Equat.    Gal    SGal    Ecl

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2020.06.06-07:47:37

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