2020A&A...640A..89E


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET14:48:07

2020A&A...640A..89E - Astronomy and Astrophysics, volume 640A, 89-89 (2020/8-1)

Cobalt and copper abundances in 56 Galactic bulge red giants.

ERNANDES H., BARBUY B., FRIACA A.C.S., HILL V., ZOCCALI M., MINNITI D., RENZINI A. and ORTOLANI S.

Abstract (from CDS):


Context. The Milky Way bulge is an important tracer of the early formation and chemical enrichment of the Galaxy. The abundances of different iron-peak elements in field bulge stars can give information on the nucleosynthesis processes that took place in the earliest supernovae. Cobalt (Z=27) and copper (Z=29) are particularly interesting.
Aims. We aim to identify the nucleosynthesis processes responsible for the formation of the iron-peak elements Co and Cu.
Methods. We derived abundances of the iron-peak elements cobalt and copper in 56 bulge giants, 13 of which were red clump stars. High-resolution spectra were obtained using FLAMES-UVES at the ESO Very Large Telescope by our group in 2000-2002, which appears to be the highest quality sample of optical high-resolution data on bulge red giants obtained in the literature to date. Over the years we have derived the abundances of C, N, O, Na, Al, Mg; the iron-group elements Mn and Zn; and neutron-capture elements. In the present work we derive abundances of the iron-peak elements cobalt and copper. We also compute chemodynamical evolution models to interpret the observed behaviour of these elements as a function of iron.
Results. The sample stars show mean values of [Co/Fe]∼0.0 at all metallicities, and [Cu/Fe]∼0.0 for [Fe/H]≥-0.8 and decreasing towards lower metallicities with a behaviour of a secondary element.
Conclusions. We conclude that [Co/Fe] varies in lockstep with [Fe/H], which indicates that it should be produced in the alpha-rich freezeout mechanism in massive stars. Instead [Cu/Fe] follows the behaviour of a secondary element towards lower metallicities, indicating its production in the weak s-process nucleosynthesis in He-burning and later stages. The chemodynamical models presented here confirm the behaviour of these two elements (i.e. [Co/Fe] vs. [Fe/H]∼constant and [Cu/Fe] decreasing with decreasing metallicities).

Abstract Copyright: © ESO 2020

Journal keyword(s): stars: abundances - Galaxy: bulge - Galaxy: abundances - nuclear reactions, nucleosynthesis, abundances - stars: late-type

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 63

goto Full paper

goto View the reference in ADS

Number of rows : 63

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. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 405 0
2 * 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 2148 0
3 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11760 0
4 [LHZ2007] BWc-13 * 18 03 04.4893868491 -29 58 14.603039416 20.140 18.724 16.726   14.929 ~ 8 0
5 [LHZ2007] BWc-11 * 18 03 04.6332931598 -29 59 35.759949763 19.876 18.310 16.693   14.949 ~ 8 0
6 [LHZ2007] BWc-8 * 18 03 12.3644252261 -30 03 59.547946914 20.702 18.616 16.972   15.193 ~ 9 0
7 [LHZ2007] BWc-9 * 18 03 16.5537122111 -30 03 51.804741919 20.588 18.527 16.903   15.131 ~ 9 0
8 Cl* NGC 6522 ARP 4153 * 18 03 18.8003490110 -30 01 10.439543648 19.790 18.213 16.695   15.009 ~ 9 0
9 [LHZ2007] BWc-12 * 18 03 19.9791737639 -29 58 26.215675510 20.825 18.623 16.921   15.114 ~ 9 0
10 [LHZ2007] BW-f8 * 18 03 30.5063489701 -30 01 45.217655491     16.00     ~ 6 0
11 NAME Baade Window reg 18 03.5 -30 01           ~ 538 3
12 2MASS J18033691-3007047 RG* 18 03 36.9107358922 -30 07 04.745151389     18.387   14.272 K 17 0
13 2MASS J18033716-2954227 * 18 03 37.1625043763 -29 54 22.696842259     17.994   14.29 K 10 0
14 GIBS 5714 * 18 03 50.3227657534 -30 05 32.484301929 20.985 18.587 16.838   15.010 ~ 9 0
15 UCAC4 300-175366 * 18 03 51.8484916175 -30 06 28.431729445     16.42 15.39 14.430 K 11 0
16 [LHZ2007] BWc-3 * 18 03 54.6050512120 -30 01 06.611890184 20.179 18.689 16.906   15.144 ~ 7 0
17 [LHZ2007] BWc-4 * 18 03 55.3007235026 -30 00 57.766146555 19.593 18.240 16.760   15.161 ~ 8 0
18 [LHZ2007] BWc-5 * 18 03 55.9017852873 -29 55 44.199843604 21.116 18.750 16.982   15.175 ~ 8 0
19 [LHZ2007] BWc-6 * 18 03 56.4239508669 -29 55 12.228141950 19.497 18.238 16.744   15.069 ~ 8 0
20 [LHZ2007] BWc-2 * 18 03 56.7063788818 -30 05 37.853409969 20.434 18.830 17.191   15.392 ~ 8 0
21 [LHZ2007] BW-f4 * 18 04 01.400 -30 10 20.70     16.07   14.38 ~ 8 0
22 [LHZ2007] BW-b7 * 18 04 04.5753372974 -30 02 40.110594101     16.69   14.24 ~ 8 0
23 UCAC4 300-176252 * 18 04 05.3511750154 -30 05 53.001688664     16.95 16.06 14.42 ~ 9 0
24 2MASS J18041328-2958182 RG* 18 04 13.2871674588 -29 58 18.227164819     18.832   14.45 K 13 0
25 [LHZ2007] BW-b2 * 18 04 23.9680899565 -30 05 58.307621265     16.58   14.68 K 9 0
26 [LHZ2007] BW-f5 * 18 04 39.6271157135 -29 55 20.249651493     15.88   14.28 K 9 0
27 [LHZ2007] BW-f7 * 18 04 43.9481077609 -30 03 15.752443605     16.31   14.51 K 9 0
28 2MASS J18081265-2550046 RG* 18 08 12.6351846476 -25 50 04.519327386     18.490     K 8 0
29 [LHZ2007] B3-b1 * 18 08 15.8383956237 -25 42 09.854483370       15.82   K 9 0
30 2MASS J18081617-2543192 RG* 18 08 16.1749812415 -25 43 19.196350461     18.514     K 8 0
31 2MASS J18082459-2548444 RG* 18 08 24.5995980204 -25 48 44.482589766     18.915   16.488 K 10 0
32 [LHZ2007] B3-f4 * 18 08 44.2854118475 -26 00 25.092914946           K 7 0
33 2MASS J18084446-2557568 RG* 18 08 44.4651221176 -25 57 56.931002517     16.36     ~ 7 0
34 [LHZ2007] B3-b3 * 18 08 46.5270 -25 42 44.401     16.59     ~ 6 0
35 [LHZ2007] B3-f3 * 18 08 49.6266819412 -25 40 36.911849528       15.79   K 8 0
36 2MASS J18090052-2548070 RG* 18 09 00.5309104646 -25 48 06.860159501     18.345     K 8 0
37 2MASS J18091405-2556473 RG* 18 09 14.0592353049 -25 56 47.312141370     16.63     ~ 7 0
38 [LHZ2007] B3-f2 * 18 09 15.6070840978 -25 57 32.732446111           K 6 0
39 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 538 0
40 2MASS J18091653-2549261 RG* 18 09 16.5369954494 -25 49 26.056300584     18.659   16.355 K 10 0
41 [LHZ2007] B3-f5 * 18 09 18.5310 -25 43 37.403     16.61     ~ 6 0
42 [LHZ2007] B3-f7 * 18 09 23.6919375281 -25 50 38.187895885           K 7 0
43 [LHZ2007] B6-b6 * 18 09 49.1019810653 -31 50 07.640121332     17.793   14.39 K 10 0
44 [LHZ2007] B6-b1 * 18 09 50.4779912976 -31 40 51.667082866     17.995   14.29 K 10 0
45 [LHZ2007] B6-b8 * 18 09 55.9585034106 -31 45 46.283659059     18.397   16.290 K 12 0
46 [LHZ2007] B6-f8 * 18 09 56.8500647896 -31 43 22.563854462     17.263   14.04 K 10 0
47 [LHZ2007] B6-f1 * 18 10 04.4609222712 -31 41 45.276465311     17.901   15.960 K 12 0
48 [LHZ2007] B6-b4 * 18 10 07.7797701666 -31 52 41.407818873     17.842   14.40 K 10 0
49 [LHZ2007] B6-f2 * 18 10 11.63600 -31 48 19.1960     15.91     ~ 6 0
50 [LHZ2007] B6-f3 * 18 10 17.7261474100 -31 41 55.192897884     17.255   14.17 K 10 0
51 [LHZ2007] B6-b3 * 18 10 19.0671371732 -31 40 28.172418211     17.705   14.47 K 10 0
52 [LHZ2007] B6-b2 * 18 10 34.1170 -31 49 09.094     16.40     ~ 6 0
53 [LHZ2007] B6-b5 * 18 10 37.3812642162 -31 40 29.143184058     17.711   14.37 K 10 0
54 [LHZ2007] B6-f5 * 18 10 41.5178918381 -31 40 11.885551415     17.632   14.17 K 10 0
55 [LHZ2007] B6-f7 * 18 10 52.3070717928 -31 46 42.146696836     17.841   15.950 K 12 0
56 [LHZ2007] BL-1 * 18 34 58.5116879937 -34 33 15.242571624       15.20   K 7 0
57 [LHZ2007] BL-4 * 18 35 21.1117190668 -34 44 48.099354633           K 7 0
58 [LHZ2007] BL-3 * 18 35 27.5110633260 -34 31 59.344905774           K 7 0
59 [LHZ2007] BL-7 * 18 35 57.2602900830 -34 38 04.693980641           K 7 0
60 [LHZ2007] BL-5 * 18 36 01.0020988250 -34 31 47.936591795           K 7 0
61 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1777 2
62 NAME Galactic Bulge reg ~ ~           ~ 3459 0
63 [LHZ2007] BWc-7 * ~ ~     17.01     ~ 2 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2020A&A...640A..89E and select 'bookmark this link' or equivalent in the popup menu


2020.10.26-14:48:07

© Université de Strasbourg/CNRS

    • Contact