2006A&A...457..645Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET13:21:49

2006A&A...457..645Z - Astronomy and Astrophysics, volume 457, 645-650 (2006/10-2)

Potassium abundances in nearby metal-poor stars.

ZHANG H.W., GEHREN T., BUTLER K., SHI J.R. and ZHAO G.

Abstract (from CDS):

The potassium abundances for 58 metal-poor stars are determined using high-resolution spectroscopy. The abundance trends in stars of different population are discussed. All abundance results have been derived from NLTE statistical equilibrium calculations and spectrum synthesis methods. The NLTE corrections are significant (-0.20 to -0.55dex) and they depend on the effective temperatures and surface gravities. The potassium abundances of thin disk, thick disk and halo stars show distinct trends, such as in the case of the α-elements. [K/Fe] gradually increases with a decrease in [Fe/H] for thin disk stars, [K/Fe] of thick disk stars is nearly constant at [K/Fe]~+0.30dex; halo stars also have nearly constant values of [K/Fe]~+0.20dex. The derived dependence between [K/Fe] and [Fe/H] is in agreement with the theoretical prediction of published model calculations of the chemical evolution of the Galaxy. The nearly constant [K/Mg] ratio with small scatter suggests that the nucleosynthesis of potassium is closely coupled to the α-elements.

Abstract Copyright:

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

Simbad objects: 61

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Number of rows : 61

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 * 85 Peg SB* 00 02 10.3411392575 +27 04 54.476788744 6.47 6.42 5.75 5.16 4.73 G5VbFe-2 518 0
2 BD+30 89 PM* 00 38 47.4607754368 +31 01 08.935848090   9.67   8.6   G0 28 0
3 CD-38 245 Pe* 00 46 36.1954714218 -37 39 33.555736375   12.733 11.929 13.39 10.996 KIIvw 200 0
4 BPS CS 31082-0001 Pe* 01 29 31.1311330115 -16 00 45.496485322 12.527 12.427 11.642 11.189 10.713 CEMP 238 0
5 HD 17948 PM* 02 55 56.9207493120 +61 31 16.097176885   6.001 5.584     F5V 83 0
6 HD 22309 PM* 03 36 03.1584493309 +16 28 02.891319613 8.250 8.230   7.3   G0 57 0
7 HD 22879 Pe* 03 40 22.0654223510 -03 13 01.124769689 7.146 7.222 6.667 6.346 6.016 G0VmF2 426 0
8 HD 241253 PM* 05 09 56.9590196910 +05 33 26.743378965   10.24   9.4   G0 83 0
9 HD 243357 PM* 05 25 27.9844571193 +32 24 41.292408513   10.36   9.4   G2 35 0
10 HD 36283 PM* 05 31 13.7776106070 +15 46 24.430398713   9.31   8.2   G4 59 0
11 HD 246067 PM* 05 39 27.4340740248 +03 57 02.685222706       9.9   G0 47 0
12 HD 250792 PM* 06 03 14.8634898007 +19 21 38.692248180 9.89 9.898 9.310 8.954 8.547 G1 142 3
13 HD 56513 PM* 07 18 28.8690667342 +27 15 10.271357590   8.70   7.6   G2V 50 0
14 HD 58551 PM* 07 26 50.2564112797 +21 32 08.348615001   7.00   6.3   F6V 118 0
15 HD 59374 PM* 07 30 29.0167349664 +18 57 40.617055091   9.03   8.2   F9 105 0
16 HD 59984 PM* 07 32 05.7631181661 -08 52 52.773345653   6.431 5.916     G0VFe-1.6CH-0.5 184 0
17 HD 60319 PM* 07 34 35.1080318077 +16 54 04.031855106   9.46   8.6   F8 83 0
18 HD 233511 PM* 08 19 22.5717671718 +54 05 09.627780721 10.02 10.24   9.4   F4 120 0
19 BD+65 737 PM* 09 49 42.8200461811 +65 18 15.035108186   10.35   9.2   G3 39 0
20 HD 88446 PM* 10 12 19.0773304082 +17 17 57.051756021   8.40   7.5   Gwl 101 0
21 HD 88725 PM* 10 14 08.3345668419 +03 09 04.675865338 8.34 8.33 7.73 7.24 6.89 G3/5V 168 0
22 HD 91784 PM* 10 36 10.8494556138 +15 52 18.966615663   9.70   8.7   G0 27 0
23 BD+29 2091 PM* 10 47 23.1625623007 +28 23 55.928286438   10.72   10.1   F5 125 0
24 * 51 LMi PM* 11 05 15.4745795131 +25 12 06.856879744   8.18   7.2   G0 70 0
25 HD 97855B PM* 11 16 03.6540201477 +52 46 35.318442820   8.53   7.4   G0V 38 0
26 BD+20 2594 PM* 11 23 16.2308862209 +19 53 37.665333745   10.51   9.6   F9 65 0
27 HD 104056 PM* 11 59 03.0838158008 -04 46 38.936919475   9.58 9.01     G3V 45 0
28 HD 108076 PM* 12 24 45.8892348867 +38 19 07.461955799   8.58   7.7   G0V 98 0
29 HD 114606 PM* 13 11 21.4029562561 +09 37 33.539749216 9.41 9.34 8.72 8.18 7.81 G4 112 1
30 HD 118659 PM* 13 38 00.4712954269 +19 08 53.098367002 9.58 9.47   8.4   G4V 80 0
31 HD 119288 PM* 13 42 12.7607173974 +08 23 18.227521395   6.58   5.9   F2V 106 0
32 HD 123710 PM* 14 04 57.0712635984 +74 34 24.892571708   8.79   7.8   G5 59 0
33 HD 126512 PM* 14 25 30.1203516561 +20 35 24.574602350   7.89   6.9   G0 100 0
34 HD 134169 * 15 08 18.0562462154 +03 55 50.107808860 8.14 8.22 7.70     F7V 193 0
35 * 39 Ser SB* 15 53 12.0969759597 +13 11 47.842699872 6.72 6.71 6.12 5.58 5.23 G1VFe-1 173 0
36 HD 144061 PM* 15 58 21.0287423547 +70 53 39.979166768   7.903 7.280 8.00   G2V 50 0
37 HD 148816 PM* 16 30 28.4586643435 +04 10 41.603810207 7.75 7.81 7.28 6.82 6.49 F7V 279 0
38 HD 149996 PM* 16 38 17.3888629905 -02 26 31.814238231   9.10 8.49     G1V 75 0
39 BD+68 901 PM* 16 56 24.1550840418 +68 01 30.582100587   9.39   8.2   G0 30 0
40 HD 157089 PM* 17 21 07.0567914512 +01 26 34.981760941 7.60 7.59 7.01 6.46 6.14 F8VgF8mF6 233 0
41 HD 157466 PM* 17 22 27.6461103752 +24 52 45.934455673       6.6   F8V 108 0
42 HD 158226 PM* 17 26 43.1970011642 +31 04 37.894858895   9.09   8.1   G1V 101 0
43 HD 160933 SB* 17 36 40.0076252402 +69 34 14.778898265   7.00   6.0   F9IV-V 80 0
44 BD+18 3423 PM* 17 38 15.6095483986 +18 33 25.484101675 10.17 10.27   9.4   F6V 115 0
45 HD 160693 PM* 17 39 36.8721114627 +37 11 01.504427710 8.94 8.92   8.0   G0 190 0
46 HD 170357 PM* 18 26 37.7259243207 +46 05 01.601435002   8.93   7.9   G1V 44 0
47 HD 171620 PM* 18 34 30.6939438450 +34 24 56.295150285   8.06   7.2   F6p 68 0
48 HD 230473 PM* 19 01 51.0139782620 +16 03 48.400759029   10.997 10.378 9.977 9.592 G0 24 0
49 HD 182807 ** 19 25 25.7580116416 +24 54 45.988319672   6.70   5.9   F8 85 0
50 HD 184448 PM* 19 32 02.5281551739 +50 10 53.559251885   8.69   7.7   F8 53 0
51 HD 186379 PM* 19 43 07.0300235292 +24 35 52.584762528   7.41   6.5   F8V 74 0
52 HD 198300 PM* 20 46 35.47971 +59 51 09.4930       8.2   G0 41 1
53 HD 200580 SB* 21 04 07.4073421467 +02 59 40.012308707 7.82 7.85   7.0   F9V 148 0
54 HD 204155 PM* 21 26 42.9051661431 +05 26 29.899070605   9.03   8.1   F7V 115 0
55 BD+26 4251 PM* 21 43 57.1238901563 +27 23 23.991146537       9.9   F6 72 0
56 HD 208906 PM* 21 58 40.8319509283 +29 48 45.457435407 7.35 7.47 6.96 6.53 6.22 G0VmF2 157 0
57 BD+75 839 ** 22 35 52.6308240770 +76 29 32.568422416       9.1   G0wl 35 0
58 HD 215257 PM* 22 43 50.7183139841 +03 53 12.629544211   7.93   7.1   F5V 133 0
59 HD 218209 PM* 23 05 06.0911806521 +68 25 01.432968207 8.21 8.13 7.48 6.94 6.57 G8 118 0
60 HE 2323-0256 Pe* 23 26 29.8073543039 -02 39 58.037206596   15.12 14.36   13.358 CEMP-no 166 0
61 HD 221876 PM* 23 35 42.5403143632 +20 34 50.333144438   9.66   8.8   G2 39 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-13:21:49

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