2017A&A...598A.121F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:26:06

2017A&A...598A.121F - Astronomy and Astrophysics, volume 598A, 121-121 (2017/2-1)

Tracing the evolution of the Galactic bulge with chemodynamical modelling of alpha-elements.

FRIACA A.C.S. and BARBUY B.

Abstract (from CDS):

Context. Galactic bulge abundances can be best understood as indicators of bulge formation and nucleosynthesis processes by comparing them with chemo-dynamical evolution models.
Aims. The aim of this work is to study the abundances of alpha-elements in the Galactic bulge, including a revision of the oxygen abundance in a sample of 56 bulge red giants.
Methods. Literature abundances for O, Mg, Si, Ca and Ti in Galactic bulge stars are compared with chemical evolution models. For oxygen in particular, we reanalysed high-resolution spectra obtained using FLAMES+UVES on the Very Large Telescope, now taking each star's carbon abundances, derived from CI and C2 lines, into account simultaneously.
Results. We present a chemical evolution model of alpha-element enrichment in a massive spheroid that represents a typical classical bulge evolution. The code includes multi-zone chemical evolution coupled with hydrodynamics of the gas. Comparisons between the model predictions and the abundance data suggest a typical bulge formation timescale of 1-2Gyr. The main constraint on the bulge evolution is provided by the O data from analyses that have taken the C abundance and dissociative equilibrium into account. Mg, Si, Ca and Ti trends are well reproduced, whereas the level of overabundance critically depends on the adopted nucleosynthesis prescriptions.

Abstract Copyright: © ESO, 2017

Journal keyword(s): Galaxy: bulge - stars: atmospheres - Galaxy: abundances - stars: abundances - Galaxy: stellar content

Simbad objects: 64

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Number of rows : 64

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10902 1
2 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
3 [LHZ2007] BWc-13 * 18 03 04.4893868491 -29 58 14.603039416 20.140 18.724 16.726   14.929 ~ 7 0
4 [LHZ2007] BWc-11 * 18 03 04.6332931598 -29 59 35.759949763 19.876 18.310 16.693   14.949 ~ 7 0
5 [LHZ2007] BWc-8 * 18 03 12.3644252261 -30 03 59.547946914 20.702 18.616 16.972   15.193 ~ 8 0
6 [LHZ2007] BWc-9 * 18 03 16.5537122111 -30 03 51.804741919 20.588 18.527 16.903   15.131 ~ 8 0
7 Cl* NGC 6522 ARP 4153 * 18 03 18.8003490110 -30 01 10.439543648 19.790 18.213 16.695   15.009 ~ 8 0
8 [LHZ2007] BWc-12 * 18 03 19.9791737639 -29 58 26.215675510 20.825 18.623 16.921   15.114 ~ 8 0
9 ISOGAL-P J180323.6-300159 AB* 18 03 23.5581380761 -30 01 59.006808411     13.804   11.744 ~ 32 0
10 Cl* NGC 6522 ARP 4329 * 18 03 28.4319214113 -29 58 41.692167635     15.110 14.58 13.282 ~ 27 0
11 [LHZ2007] BW-f8 * 18 03 30.5063489701 -30 01 45.217655491     16.00     ~ 5 0
12 NAME Baade Window reg 18 03.5 -30 01           ~ 528 3
13 2MASS J18033691-3007047 RG* 18 03 36.9107358922 -30 07 04.745151389     18.387   14.272 K 16 0
14 2MASS J18033716-2954227 * 18 03 37.1625043763 -29 54 22.696842259     17.994   14.29 K 9 0
15 Cl* NGC 6522 ARP 1322 RG* 18 03 49.3866213216 -30 01 54.191241971   16.46 14.467   12.532 ~ 29 0
16 GIBS 5714 * 18 03 50.3227657534 -30 05 32.484301929 20.985 18.587 16.838   15.010 ~ 8 0
17 UCAC4 300-175366 * 18 03 51.8484916175 -30 06 28.431729445     16.42 15.39 14.430 K 10 0
18 [LHZ2007] BWc-3 * 18 03 54.6050512120 -30 01 06.611890184 20.179 18.689 16.906   15.144 ~ 6 0
19 [LHZ2007] BWc-4 * 18 03 55.3007235026 -30 00 57.766146555 19.593 18.240 16.760   15.161 ~ 7 0
20 [LHZ2007] BWc-5 * 18 03 55.9017852873 -29 55 44.199843604 21.116 18.750 16.982   15.175 ~ 7 0
21 [LHZ2007] BWc-6 * 18 03 56.4239508669 -29 55 12.228141950 19.497 18.238 16.744   15.069 ~ 7 0
22 [LHZ2007] BWc-2 * 18 03 56.7063788818 -30 05 37.853409969 20.434 18.830 17.191   15.392 ~ 7 0
23 [LHZ2007] BW-f4 * 18 04 01.400 -30 10 20.70     16.07   14.38 ~ 7 0
24 [LHZ2007] BW-b7 * 18 04 04.5753372974 -30 02 40.110594101     16.69   14.24 ~ 7 0
25 UCAC4 300-176252 * 18 04 05.3511750154 -30 05 53.001688664     16.95 16.06 14.42 ~ 8 0
26 2MASS J18041328-2958182 RG* 18 04 13.2871674588 -29 58 18.227164819     18.832   14.45 K 12 0
27 [LHZ2007] BW-b2 * 18 04 23.9680899565 -30 05 58.307621265     16.58   14.68 K 8 0
28 [LHZ2007] BW-f5 * 18 04 39.6271157135 -29 55 20.249651493     15.88   14.28 K 8 0
29 [LHZ2007] BW-f7 * 18 04 43.9481077609 -30 03 15.752443605     16.31   14.51 K 8 0
30 2MASS J18081265-2550046 RG* 18 08 12.6351846476 -25 50 04.519327386     18.490     K 7 0
31 [LHZ2007] B3-b1 * 18 08 15.8383956237 -25 42 09.854483370       15.82   K 8 0
32 2MASS J18081617-2543192 RG* 18 08 16.1749812415 -25 43 19.196350461     18.514     K 7 0
33 2MASS J18082459-2548444 RG* 18 08 24.5995980204 -25 48 44.482589766     18.915   16.488 K 9 0
34 [LHZ2007] B3-f4 * 18 08 44.2854118475 -26 00 25.092914946           K 6 0
35 2MASS J18084446-2557568 RG* 18 08 44.4651221176 -25 57 56.931002517     16.36     ~ 6 0
36 [LHZ2007] B3-b3 * 18 08 46.5270 -25 42 44.401     16.59     ~ 5 0
37 [LHZ2007] B3-f3 * 18 08 49.6266819412 -25 40 36.911849528       15.79   K 7 0
38 2MASS J18090052-2548070 RG* 18 09 00.5309104646 -25 48 06.860159501     18.345     K 7 0
39 2MASS J18091405-2556473 RG* 18 09 14.0592353049 -25 56 47.312141370     16.63     ~ 6 0
40 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 535 0
41 2MASS J18091653-2549261 RG* 18 09 16.5369954494 -25 49 26.056300584     18.659   16.355 K 9 0
42 [LHZ2007] B3-f5 * 18 09 18.5310 -25 43 37.403     16.61     ~ 5 0
43 [LHZ2007] B3-f7 * 18 09 23.6919375281 -25 50 38.187895885           K 6 0
44 [LHZ2007] B6-b6 * 18 09 49.1019810653 -31 50 07.640121332     17.793   14.39 K 9 0
45 [LHZ2007] B6-b1 * 18 09 50.4779912976 -31 40 51.667082866     17.995   14.29 K 9 0
46 [LHZ2007] B6-b8 * 18 09 55.9585034106 -31 45 46.283659059     18.397   16.290 K 11 0
47 [LHZ2007] B6-f8 * 18 09 56.8500647896 -31 43 22.563854462     17.263   14.04 K 9 0
48 [LHZ2007] B6-f1 * 18 10 04.4609222712 -31 41 45.276465311     17.901   15.960 K 11 0
49 [LHZ2007] B6-b4 * 18 10 07.7797701666 -31 52 41.407818873     17.842   14.40 K 9 0
50 [LHZ2007] B6-f2 * 18 10 11.63600 -31 48 19.1960     15.91     ~ 5 0
51 [LHZ2007] B6-f3 * 18 10 17.7261474100 -31 41 55.192897884     17.255   14.17 K 9 0
52 [LHZ2007] B6-b3 * 18 10 19.0671371732 -31 40 28.172418211     17.705   14.47 K 9 0
53 [LHZ2007] B6-b2 * 18 10 34.1170 -31 49 09.094     16.40     ~ 5 0
54 [LHZ2007] B6-b5 * 18 10 37.3812642162 -31 40 29.143184058     17.711   14.37 K 9 0
55 [LHZ2007] B6-f5 * 18 10 41.5178918381 -31 40 11.885551415     17.632   14.17 K 9 0
56 [LHZ2007] B6-f7 * 18 10 52.3070717928 -31 46 42.146696836     17.841   15.950 K 11 0
57 [LHZ2007] BL-1 * 18 34 58.5116879937 -34 33 15.242571624       15.20   K 6 0
58 [LHZ2007] BL-4 * 18 35 21.1117190668 -34 44 48.099354633           K 6 0
59 [LHZ2007] BL-3 * 18 35 27.5110633260 -34 31 59.344905774           K 6 0
60 [LHZ2007] BL-7 * 18 35 57.2602900830 -34 38 04.693980641           K 6 0
61 [LHZ2007] BL-5 * 18 36 01.0020988250 -34 31 47.936591795           K 6 0
62 [LHZ2007] BWc-7 * ~ ~     17.01     ~ 1 0
63 GrW 150914 GWE ~ ~           ~ 366 1
64 NAME Galactic Bulge reg ~ ~           ~ 3387 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-22:26:06

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