2006A&A...451.1065G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.15CEST19:53:22

2006A&A...451.1065G - Astronomy and Astrophysics, volume 451, 1065-1079 (2006/6-1)

Na, Mg and Al abundances as a population discriminant for nearby metal-poor stars.

GEHREN T., SHI J.R., ZHANG H.W., ZHAO G. and KORN A.J.

Abstract (from CDS):

Parameters for 55 nearby metal-poor stars are determined using high-resolution spectroscopy. Together with similar data taken from a recent analysis, they are used to show trends of their Galactic evolution with stellar [Fe/H] or [Mg/H] abundances. The separation of abundance ratios between disk and halo stars is used as a basic criterion for population membership. After careful selection of a clean subsample free of suspected or known binaries and peculiar stars, abundances of Mg, Na and Al are based on NLTE kinetic equilibrium calculations applied to spectrum synthesis methods. The relation between [Na/Mg] and [Fe/H] is a continuous enrichment through all three Galactic populations spanning a range of values between a metal-poor plateau at [Na/Mg]=-0.7 and solar values. [Al/Mg] displays a step-like difference between stars of the Galactic halo with <[Al/Mg]≳-0.45 and the two disk populations with <[Al/Mg]≳+0.10. [Al/Mg] ratios, together with the [Mg/Fe] ratios, asymmetric drift velocities V, and stellar evolutionary ages, make possible the individual discrimination between stars of the thick disk and the halo. At present, this evidence is limited by the small number of stars, and by the theoretical and empirical uncertainties of stellar age determinations, but it achieves a high significance. While the stellar sample is not complete with respect to space volume, the resulting abundances indicate the necessity to revise current models of chemical evolution to allow for an adequate production of Al in early stellar generations.

Abstract Copyright:

Journal keyword(s): line: formation - line: profiles - stars: abundances - stars: late-type - Galaxy: evolution

Simbad objects: 74

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Number of rows : 74

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HE 0107-5240 Pe* 01 09 29.1554552993 -52 24 34.203535506   15.89 15.07 15.10 14.283 CEMP-no 224 0
2 BD+46 610 SB* 02 41 45.7380688452 +47 21 01.253061180       8.8   F8 55 0
3 HD 17948 PM* 02 55 56.9207493120 +61 31 16.097176885   6.001 5.584     F5V 81 0
4 HD 19445 PM* 03 08 25.5884 +26 19 51.400 8.29 8.52 8.06 7.60 7.27 G2VFe-3 732 0
5 HD 22309 PM* 03 36 03.1584493309 +16 28 02.891319613 8.250 8.230   7.3   G0 57 0
6 HD 22879 Pe* 03 40 22.0654223510 -03 13 01.124769689 7.146 7.222 6.667 6.346 6.016 G0VmF2 420 0
7 HD 29907 SB* 04 38 22.4006754245 -65 24 57.599417729   10.52 9.91     F8V 86 0
8 HD 30649 PM* 04 51 43.5714471304 +45 50 02.842355226 7.59 7.55 6.97 6.45 6.10 G2 211 0
9 HD 31128 PM* 04 52 09.9097489102 -27 03 50.940327190   9.55 9.14     F3/5Vw 117 0
10 BD+03 740 HB* 05 01 16.6227347580 +04 06 37.023779331 9.97 10.17   9.6   sdF0 157 0
11 HD 241253 PM* 05 09 56.9590196910 +05 33 26.743378965   10.24   9.4   G0 83 0
12 BD+47 1140 PM* 05 22 45.8239260022 +47 54 49.252209627   9.82   8.8   G0 27 0
13 HD 243357 PM* 05 25 27.9844571193 +32 24 41.292408513   10.36   9.4   G2 35 0
14 HD 36283 PM* 05 31 13.7776106070 +15 46 24.430398713   9.31   8.2   G4 58 0
15 HD 246067 PM* 05 39 27.4340740248 +03 57 02.685222706       9.9   G0 47 0
16 HD 250792 PM* 06 03 14.8634898007 +19 21 38.692248180 9.89 9.898 9.310 8.954 8.547 G1 140 3
17 HD 46341 PM* 06 32 37.9911853832 -06 29 18.503591738   9.16 8.60     G2V 68 0
18 HD 56513 PM* 07 18 28.8690667342 +27 15 10.271357590   8.70   7.6   G2V 48 0
19 HD 58551 PM* 07 26 50.2564112797 +21 32 08.348615001   7.00   6.3   F6V 117 0
20 HD 59374 PM* 07 30 29.0167349664 +18 57 40.617055091   9.03   8.2   F9 104 0
21 HD 59984 PM* 07 32 05.7631181661 -08 52 52.773345653   6.431 5.916     G0VFe-1.6CH-0.5 183 0
22 HD 60319 PM* 07 34 35.1080318077 +16 54 04.031855106   9.46   8.6   F8 83 0
23 BD+36 1650 SB* 07 35 34.0506088027 +35 57 11.265029096   11.00   10.1   ~ 35 0
24 BD+25 1858 SB* 08 08 54.4595409375 +24 37 26.341252603   10.33   9.3   G8 56 0
25 HD 69611 PM* 08 17 29.3479423950 -03 59 22.619129726   8.32 7.74     G0V 114 0
26 HD 233511 PM* 08 19 22.5717671718 +54 05 09.627780721 10.02 10.24   9.4   F4 120 0
27 HD 74000 PM* 08 40 50.8038415228 -16 20 42.513275817 9.84 10.09 9.66     F2 241 0
28 BD+25 1981 PM* 08 44 24.6897133760 +24 47 47.745336304   9.65   9.1   F0 127 0
29 BD+09 2190 PM* 09 29 15.5616421382 +08 38 00.469417390   11.54   10.8   sdA5 115 0
30 Ross 889 Pe* 09 40 43.2053386236 +01 00 29.514872822       10.39   sdA4 149 0
31 HD 84937 PM* 09 48 56.09801 +13 44 39.3237 8.49 8.68 8.32 7.97 7.70 F8Vm-5 704 0
32 BD+65 737 PM* 09 49 42.8200461811 +65 18 15.035108186   10.35   9.2   G3 38 0
33 HD 88446 PM* 10 12 19.0773304082 +17 17 57.051756021   8.40   7.5   Gwl 100 0
34 HD 88725 PM* 10 14 08.3345668419 +03 09 04.675865338 8.34 8.33 7.73 7.24 6.89 G3/5V 167 0
35 HD 91784 PM* 10 36 10.8494556138 +15 52 18.966615663   9.70   8.7   G0 27 0
36 BD+29 2091 PM* 10 47 23.1625623007 +28 23 55.928286438   10.72   10.1   F5 124 0
37 BD+21 2244 SB* 10 49 52.6446450128 +20 29 30.013117846   10.56   9.7   ~ 43 0
38 HD 94028 PM* 10 51 28.1254469804 +20 16 38.965521484 8.51 8.69 8.22 7.82 7.54 F8 325 0
39 * 51 LMi PM* 11 05 15.4745795131 +25 12 06.856879744   8.18   7.2   G0 69 0
40 HD 97320 PM* 11 11 00.7344947834 -65 25 37.746274848   9.769 9.269     F3V 119 0
41 HD 97855 PM* 11 16 04.0347215547 +52 46 23.386381656       6.2   F6VgF6mF3 82 0
42 BD+20 2594 PM* 11 23 16.2308862209 +19 53 37.665333745   10.51   9.6   F9 65 0
43 HD 101177 ** 11 38 44.90018 +45 06 30.3054 7.05 7.00   6.1   G0V+K2V 147 2
44 HD 103095 PM* 11 52 58.7683801554 +37 43 07.240082865 7.38 7.20 6.45 5.80 5.35 K1V_Fe-1.5 735 1
45 HD 104056 PM* 11 59 03.0838158008 -04 46 38.936919475   9.58 9.01     G3V 45 0
46 HD 104800 PM* 12 04 05.5627465798 +03 20 26.708766113   9.80   8.9   G3V 102 0
47 HD 107582 SB* 12 21 28.1422728947 +61 44 50.169472993   8.81   7.9   G3 69 0
48 HD 108076 PM* 12 24 45.8892348867 +38 19 07.461955799   8.58   7.7   G0V 97 0
49 HD 108754 SB* 12 29 42.7346214444 -03 19 58.687651080 9.92 9.74 9.03     G6V 117 0
50 * 10 CVn PM* 12 44 59.4050673140 +39 16 44.098316643 6.47 6.50 5.95 5.41 5.12 F9V_Fe-0.3 328 0
51 HD 114606 PM* 13 11 21.4029562561 +09 37 33.539749216 9.41 9.34 8.72 8.18 7.81 G4 112 1
52 HD 114762 SB* 13 12 19.7467346230 +17 31 01.611425890 7.78         F9VgF8mF4+M6?V 498 1
53 HE 1327-2326 Pe* 13 30 05.9395582011 -23 41 49.699027289 13.761 14.01 13.55 13.50 12.803 CEMP-no 209 0
54 HD 118659 PM* 13 38 00.4712954269 +19 08 53.098367002 9.58 9.47   8.4   G4V 79 0
55 BD+13 2698 ** 13 39 59.57275 +12 35 21.6837   9.94   9.0   F9V 77 0
56 Wolf 1492 Pe* 13 40 02.4921790616 -00 02 18.750321114 11.601 11.832 11.451 11.184 10.892 sdF0: 255 0
57 HD 119288 PM* 13 42 12.7607173974 +08 23 18.227521395   6.58   5.9   F2V 106 0
58 BD+34 2476 PM* 13 59 09.4838035693 +33 51 39.380333439 10.25 10.44   9.7   sdF5 147 0
59 HD 123710 PM* 14 04 57.0712635984 +74 34 24.892571708   8.79   7.8   G5 59 0
60 HD 126512 PM* 14 25 30.1203516561 +20 35 24.574602350   7.89   6.9   G0 99 0
61 * sig Boo PM* 14 34 40.8171808483 +29 44 42.463685978 4.76 4.84 4.47 4.13 3.94 F4VkF2mF1 561 0
62 BD+26 2606 SB* 14 49 02.3550036151 +25 42 09.136461939 9.92 10.16 9.73 9.27 8.95 A5 349 0
63 HD 134169 * 15 08 18.0562462154 +03 55 50.107808860 8.14 8.22 7.70     F7V 193 0
64 HD 140283 Pe* 15 43 03.0967798658 -10 56 00.595803430 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 845 0
65 HD 148816 PM* 16 30 28.4586643435 +04 10 41.603810207 7.75 7.81 7.28 6.82 6.49 F7V 277 0
66 HD 149996 PM* 16 38 17.3888629905 -02 26 31.814238231   9.10 8.49     G1V 75 0
67 BD+18 3423 PM* 17 38 15.6095483986 +18 33 25.484101675 10.17 10.27   9.4   F6V 115 0
68 HD 160693 PM* 17 39 36.8721114627 +37 11 01.504427710 8.94 8.92   8.0   G0 189 0
69 BD+02 3375 PM* 17 39 45.5950264172 +02 24 59.607595293 10.18 10.40 9.92 9.47 9.12 A5 180 0
70 HD 338529 PM* 19 32 31.9104538188 +26 23 26.116678290   9.72   9.2   B5 194 0
71 HD 194598 PM* 20 26 11.9185966774 +09 27 00.429262518 8.62 8.82 8.34 7.90 7.56 F8 282 0
72 HD 200580 SB* 21 04 07.4073421467 +02 59 40.012308707 7.82 7.85   7.0   F9V 148 0
73 HD 201891 PM* 21 11 59.0322335571 +17 43 39.888647667 7.74 7.88 7.37 6.91 6.59 G5V_Fe-2.5 365 0
74 HD 201889 ** 21 11 59.52350 +24 10 05.3897 8.60 8.64 8.05 7.52 7.15 G1V 147 0

    Equat.    Gal    SGal    Ecl

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2019.10.15-19:53:22

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