2010A&A...523A..17L

Query : 2010A&A...523A..17L

2010A&A...523A..17L - Astronomy and Astrophysics, volume 523A17-17 (2010/11-2)

A high-resolution VLT/FLAMES study of individual stars in the centre of the Fornax dwarf spheroidal galaxy.

LETARTE B., HILL V., TOLSTOY E., JABLONKA P., SHETRONE M., VENN K.A., SPITE M., IRWIN M.J., BATTAGLIA G., HELMI A., PRIMAS F., FRANCOIS P., KAUFER A., SZEIFERT T., ARIMOTO N. and SADAKANE K.

Abstract (from CDS):

For the first time we show the detailed, late-stage, chemical evolution history of a small nearby dwarf spheroidal galaxy in the Local Group. We present the results of a high-resolution (R∼20000, λ=5340-5620; 6120-6701) FLAMES/GIRAFFE abundance study at ESO/VLT of 81 photometrically selected, red giant branch stars in the central 25' of the Fornax dwarf spheroidal galaxy. We also carried out a detailed comparison of the effects of recent developments in abundance analysis (e.g., spherical models vs. plane-parallel) and the automation that is required to efficiently deal with such large data sets. We present abundances of α-elements (Mg, Si, Ca, and Ti), iron-peak elements (Fe, Ni, and Cr), and heavy elements (Y, Ba, La, Nd, and Eu). Our sample was randomly selected and is clearly dominated by the younger and more metal-rich component of Fornax, which represents the major fraction of stars in the central region. This means that the majority of our stars are 1-4Gyr old, and thus represent the end phase of chemical evolution in this system. Our sample of stars has unusually low [α/Fe], [Ni/Fe], and [Na/Fe] compared to the Milky Way stellar populations at the same [Fe/H]. The particularly important role of stellar winds from low-metallicity AGB stars in the creation of s-process elements is clearly seen from the high [Ba/Y]. Furthermore, we present evidence of an s-processorigin of Eu.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - galaxies: dwarf - galaxies: evolution - galaxies: formation - galaxies: stellar content - galaxies: individual: Fornax dwarf galaxy

VizieR on-line data: <Available at CDS (J/A+A/523/A17): tablea1.dat tablea2.dat tablea3.dat tablea4.dat tablea5.dat>

Nomenclature: Tables A.1-A.5: [LHT2010] BLNNN N=109 among (Nos BL038-BL325).

Errata: erratum vol. 613, art. C1 (2018)

Simbad objects: 116

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Number of rows : 116
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
2 [LHT2010] BL093 RG* 02 38 39.8962389858 -34 25 57.490065168           ~ 2 0
3 2MASS J02384047-3435251 RG* 02 38 40.4752184856 -34 35 25.265831460     18.51   16.98 ~ 9 0
4 [LHT2010] BL146 RG* 02 38 41.7927890574 -34 28 58.602098922           ~ 6 0
5 2MASS J02384221-3429510 RG* 02 38 42.2082267360 -34 29 51.074586577           ~ 5 0
6 [LHT2010] BL084 RG* 02 38 42.9879986730 -34 25 49.436497802           ~ 5 0
7 2MASS J02384346-3432054 RG* 02 38 43.4731454496 -34 32 05.507582532     18.29   16.82 ~ 11 0
8 [LHT2010] BL163 RG* 02 38 43.5737449585 -34 32 25.631794706           ~ 6 0
9 [LHT2010] BL147 RG* 02 38 44.0541787219 -34 30 52.046563303           ~ 6 0
10 2MASS J02384571-3434475 RG* 02 38 45.7126046112 -34 34 47.718729768     18.21   16.8 ~ 4 0
11 2MASS J02384930-3424053 RG* 02 38 49.3100540064 -34 24 05.317024572     18.543   16.89 ~ 8 0
12 GB07 Fnx20 RG* 02 38 53.6508957336 -34 33 04.826280780     18.457   16.71 ~ 12 0
13 2MASS J02385377-3430067 RG* 02 38 53.7843539640 -34 30 06.884683200     18.39   16.80 ~ 12 0
14 [LHT2010] BL094 RG* 02 38 53.9214566592 -34 25 07.052209940           ~ 3 0
15 [LHT2010] BL107 * 02 38 54.37 -34 31 23.5           ~ 1 0
16 GB07 Fnx06 RG* 02 38 55.5567997320 -34 25 36.681120804     18.188     ~ 5 0
17 [LHT2010] BL100 RG* 02 38 56.0321011320 -34 24 45.216767030           ~ 6 0
18 GB07 Fnx28 RG* 02 38 57.2199235584 -34 35 40.175367396     18.577     ~ 7 0
19 GB07 Fnx13 RG* 02 39 00.3186336432 -34 30 30.293164044     18.566   17.01 ~ 8 0
20 GB07 Fnx30 RG* 02 39 01.5753059085 -34 36 49.014459164     18.529   16.99 ~ 11 0
21 [WMO2009] For-1208 * 02 39 01.7737636416 -34 27 19.618725420     18.59   17.07 ~ 7 0
22 [LHT2010] BL157 * 02 39 02.44 -34 27 35.4           ~ 1 0
23 2MASS J02390293-3431123 RG* 02 39 02.9381189784 -34 31 12.301886280     18.29   16.85 ~ 4 0
24 2MASS J02390403-3437265 RG* 02 39 04.0240620840 -34 37 26.491149084     18.35   16.78 ~ 4 0
25 [LHT2010] BL109 * 02 39 04.08 -34 37 58.7     18.18   16.95 ~ 2 0
26 2MASS J02390409-3423531 RG* 02 39 04.0975378152 -34 23 53.136525732     18.44   16.98 ~ 8 0
27 GB07 Fnx05 RG* 02 39 04.3406484840 -34 25 19.173161388     18.390   16.96 ~ 9 0
28 2MASS J02390563-3426310 RG* 02 39 05.6468205096 -34 26 31.070375952     18.57   17.12 ~ 7 0
29 [LHT2010] BL158 RG* 02 39 06.8643906183 -34 35 45.982262223           ~ 6 0
30 GB07 Fnx31 RG* 02 39 08.1870665856 -34 36 53.680842684     18.274     ~ 8 0
31 2MASS J02390838-3432451 RG* 02 39 08.3762175912 -34 32 45.053577780   20.071 18.56 17.701 17.03 ~ 6 0
32 GB07 Fnx16 RG* 02 39 08.5373495328 -34 30 55.662476112     18.398   16.92 ~ 8 0
33 GB07 Fnx09 RG* 02 39 11.0174908200 -34 28 34.794801984     18.527   17.07 ~ 9 0
34 2MASS J02391107-3439090 RG* 02 39 11.0832316368 -34 39 09.089157744     18.36   16.74 ~ 8 0
35 GB07 Fnx15 RG* 02 39 11.5950166128 -34 30 45.025631532     18.496   16.9 ~ 9 0
36 2MASS J02391340-3440163 RG* 02 39 13.4044386936 -34 40 16.332750300     18.44   16.91 ~ 6 0
37 GB07 Fnx10 RG* 02 39 13.9746891112 -34 28 36.602924029   20.039 18.550 17.708 16.99 ~ 10 0
38 2MASS J02391438-3422418 RG* 02 39 14.3673579432 -34 22 42.008681496     18.37   16.84 ~ 9 0
39 GB07 Fnx26 RG* 02 39 14.3827552392 -34 34 42.637844820     18.757   17.11 ~ 12 0
40 [LHT2010] BL104 RG* 02 39 14.6216479830 -34 23 21.500656227           ~ 6 0
41 [WMO2009] For-0391 * 02 39 14.8074249264 -34 27 30.365297820     18.53   17.02 ~ 7 0
42 2MASS J02391551-3430468 RG* 02 39 15.5049244920 -34 30 46.890998244     18.61   17.06 ~ 7 0
43 GB07 Fnx12 RG* 02 39 16.0444264824 -34 30 13.352608044     18.496   16.96 ~ 12 0
44 [LHT2010] BL138 RG* 02 39 16.2349562521 -34 37 00.605900154           ~ 8 0
45 [LHT2010] BL204 * 02 39 16.2620103072 -34 32 30.101458128     18.65   17.17 ~ 7 0
46 2MASS J02391678-3434501 RG* 02 39 16.7878313544 -34 34 50.132894268   20.071 18.46 17.657 16.9 ~ 8 0
47 GB07 Fnx17 RG* 02 39 17.8282697688 -34 30 57.039860448     18.702   16.98 ~ 9 0
48 2MASS J02391898-3426445 RG* 02 39 18.9841674744 -34 26 44.333399760     18.49   17.02 ~ 4 0
49 DK 39 RG* 02 39 19.6328273496 -34 24 49.616298000   20.31 18.5   16.94 ~ 9 0
50 2MASS J02391986-3426275 RG* 02 39 19.8531789648 -34 26 27.487446864     18.31   16.87 ~ 4 0
51 GB07 Fnx18 RG* 02 39 20.2378506168 -34 31 57.280700280     18.533   16.99 ~ 8 0
52 GB07 Fnx01 RG* 02 39 22.1826197976 -34 19 40.745159904     18.355   17 ~ 7 0
53 GB07 Fnx25 RG* 02 39 24.8304854804 -34 34 38.274693223     18.577   17.01 ~ 10 0
54 2MASS J02392632-3429036 * 02 39 26.3199622320 -34 29 03.690188448     18.38   16.84 ~ 6 0
55 GB07 Fnx33 RG* 02 39 27.6904648656 -34 37 48.791442756   19.829 18.347 17.448   ~ 13 0
56 GB07 Fnx23 RG* 02 39 28.0529840088 -34 34 01.280850276   19.948 18.580 17.693 17.02 ~ 12 0
57 [LHT2010] BL061 * 02 39 28.59 -34 18 38.0           ~ 1 0
58 2MASS J02392937-3426359 RG* 02 39 29.3612731224 -34 26 35.909558484   20.023 18.417 17.513 16.76 ~ 14 0
59 [LHT2010] BL069 RG* 02 39 29.5902291036 -34 25 10.874396063           ~ 2 0
60 GB07 Fnx29 RG* 02 39 30.8431991376 -34 35 45.258531468   20.192 18.671 17.746 17.01 ~ 12 0
61 GB07 Fnx03 RG* 02 39 31.5212133624 -34 23 05.395380288     18.534   17.05 ~ 12 0
62 2MASS J02393189-3429201 RG* 02 39 31.8813950832 -34 29 20.159436912   19.988 18.509 17.637 16.94 ~ 14 0
63 2MASS J02393297-3432061 RG* 02 39 32.9670178104 -34 32 06.231358968   19.898 18.42 17.651 17 ~ 11 0
64 2MASS J02393340-3433584 RG* 02 39 33.4102339152 -34 33 58.488301116     18.15   16.76 ~ 11 0
65 2MASS J02393411-3433333 RG* 02 39 34.1028400848 -34 33 33.267768948     18.464     ~ 7 0
66 GB07 Fnx21 RG* 02 39 34.1141539800 -34 33 09.701904456     18.641   17.01 ~ 10 0
67 GB07 Fnx32 RG* 02 39 38.0933137368 -34 37 06.310980516     18.494   17.07 ~ 9 0
68 [LHT2010] BL189 RG* 02 39 38.2705221704 -34 31 20.425197401           ~ 2 0
69 2MASS J02393846-3426107 RG* 02 39 38.4515419752 -34 26 10.752918144     18.54   17.07 ~ 9 0
70 2MASS J02394049-3419391 RG* 02 39 40.4880724056 -34 19 39.198908676     18.29   16.71 ~ 7 0
71 GB07 Fnx24 RG* 02 39 41.8146092952 -34 34 16.562844768     18.633     ~ 6 0
72 GB07 Fnx14 RG* 02 39 41.9495101800 -34 30 36.019343448     18.488   16.84 ~ 9 0
73 GB07 Fnx36 RG* 02 39 43.0954599408 -34 40 18.653395836     18.641   17.05 ~ 9 0
74 2MASS J02394507-3440114 RG* 02 39 45.0654331464 -34 40 11.337737376   20.453 18.635     ~ 7 0
75 [LHT2010] BL227 RG* 02 39 45.2751806495 -34 31 57.867250727           ~ 10 0
76 2MASS J02394711-3431499 RG* 02 39 47.1107180904 -34 31 49.878417792   20.269 18.59 17.746   ~ 11 0
77 2MASS J02394768-3427058 RG* 02 39 47.6773261008 -34 27 05.788441152   19.932 18.38 17.623 16.91 ~ 9 0
78 [WMO2009] For-0951 * 02 39 47.9612366760 -34 26 43.871270208     18.16   16.74 ~ 3 0
79 2MASS J02394972-3428506 RG* 02 39 49.7023803432 -34 28 50.637389844   20.188 18.6 17.813 17.06 ~ 10 0
80 2MASS J02395022-3435595 * 02 39 50.2180008096 -34 35 59.422332120   19.914 18.35 17.614 16.9 ~ 10 0
81 2MASS J02395065-3426474 RG* 02 39 50.6642553312 -34 26 47.444004096   20.088 18.39 17.658 16.91 ~ 13 0
82 WEL 60 RG* 02 39 50.7986837496 -34 28 36.829639848     18.53     K5 8 0
83 [MOW91] 16 RG* 02 39 51.2172969288 -34 29 58.867178388   20.20 18.57   16.74 ~ 12 0
84 GB07 Fnx02 RG* 02 39 51.4491689640 -34 21 21.107522736   20.63 18.548     ~ 10 0
85 [LHT2010] BL233 RG* 02 39 53.6139290592 -34 37 50.154236911           ~ 6 0
86 2MASS J02395387-3429567 RG* 02 39 53.8678292952 -34 29 56.558760360   20.47 18.29   16.70 ~ 9 0
87 GB07 Fnx27 RG* 02 39 54.2656046933 -34 35 11.337835496     18.592     ~ 5 0
88 [KGS2010] For 64059 RG* 02 39 55.4015132472 -34 29 54.846116256   20.214   17.719   ~ 10 0
89 [WMO2009] For-1233 * 02 39 56.0375212872 -34 24 10.603664676     18.46   16.98 ~ 8 0
90 [KGS2010] For 66101 RG* 02 39 57.3255133560 -34 31 21.002452428   20.153   17.674   ~ 9 0
91 [LHT2010] BL261 RG* 02 39 57.8196153297 -34 26 49.235647056           ~ 9 0
92 [WMO2009] For-2280 RR* 02 39 58.2312601848 -34 32 05.319000816   20.109 18.43 17.616 16.9 ~ 16 0
93 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
94 [LHT2010] BL293 RG* 02 40 01.8074977868 -34 27 48.189426657   20.21 18.45   16.82 ~ 5 0
95 GB07 Fnx34 RG* 02 40 02.7253509744 -34 38 30.019620948     18.162   16.902 ~ 6 0
96 WEL 112 RG* 02 40 04.4134239600 -34 27 11.601236808   19.946 18.37 17.414   K5 17 0
97 2MASS J02400550-3432429 RG* 02 40 05.5084039440 -34 32 42.767412360   20.155 18.326 17.595 16.74 ~ 12 0
98 2MASS J02400616-3428523 RG* 02 40 06.1711456656 -34 28 52.205077164   20.114 18.379 17.526 16.787 ~ 8 0
99 2MASS J02400753-3423320 RG* 02 40 07.5419948856 -34 23 31.992389592     18.42   16.99 ~ 10 0
100 2MASS J02400939-3436172 RG* 02 40 09.3959626368 -34 36 17.205025212     18.402     ~ 3 0
101 2MASS J02401001-3429589 RG* 02 40 10.0211800872 -34 29 58.971068232   19.76 18.2 18.060 16.75 ~ 17 0
102 [WMO2009] For-1255 RG* 02 40 10.4430216624 -34 25 17.664484152     18.45   16.81 ~ 10 0
103 2MASS J02401350-3430022 RG* 02 40 13.5116506728 -34 30 02.158265376   19.880   17.646   ~ 7 0
104 [WMO2009] For-1250 RG* 02 40 16.7867669616 -34 29 34.568503332   20.082 18.39 17.547 16.75 ~ 14 0
105 GB07 Fnx07 RG* 02 40 17.5320786384 -34 26 06.568309572     18.180   16.76 ~ 9 0
106 [WMO2009] For-2044 RG* 02 40 17.9251606224 -34 27 01.042993260     18.42   16.79 ~ 12 0
107 2MASS J02402046-3424003 RG* 02 40 20.4704009928 -34 24 00.376747020     18.37   16.73 ~ 11 0
108 [LHT2010] BL311 RG* 02 40 22.6661213808 -34 31 31.198266228           ~ 9 0
109 2MASS J02402422-3426205 RG* 02 40 24.2493531072 -34 26 20.369868324   19.872 18.41 17.709 17.04 ~ 9 0
110 2MASS J02402674-3426571 RG* 02 40 26.7435299016 -34 26 57.133609440   20.097   17.573   ~ 8 0
111 2MASS J02402701-3426444 RG* 02 40 27.0215995032 -34 26 44.478821544     18.46   17.05 ~ 4 0
112 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
113 * 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 2417 1
114 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
115 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
116 NAME Local Group GrG ~ ~           ~ 9325 0

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