2005A&A...442..961C


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.22CEST09:58:13

2005A&A...442..961C - Astronomy and Astrophysics, volume 442, 961-992 (2005/11-2)

The lithium content of the Galactic Halo stars.

CHARBONNEL C. and PRIMAS F.

Abstract (from CDS):

Thanks to the accurate determination of the baryon density of the universe by the recent cosmic microwave background experiments, updated predictions of the standard model of Big Bang nucleosynthesis now yield the initial abundance of the primordial light elements with unprecedented precision. In the case of 7Li, the CMB+SBBN value is significantly higher than the generally reported abundances for Pop II stars along the so-called Spite plateau. In view of the crucial importance of this disagreement, which has cosmological, galactic and stellar implications, we decided to tackle the most critical issues of the problem by revisiting a large sample of literature Li data in halo stars that we assembled following some strict selection criteria on the quality of the original analyses. In the first part of the paper we focus on the systematic uncertainties affecting the determination of the Li abundances, one of our main goal being to look for the ``highest observational accuracy achievable" for one of the largest sets of Li abundances ever assembled. We explore in great detail the temperature scale issue with a special emphasis on reddening. We derive four sets of effective temperatures by applying the same colour-Teffcalibration but making four different assumptions about reddening and determine the LTE lithium values for each of them. We compute the NLTE corrections and apply them to the LTE lithium abundances. We then focus on our ``best'' (i.e. most consistent) set of temperatures in order to discuss the inferred mean Li value and dispersion in several Teffand metallicity intervals. The resulting mean Li values along the plateau for [Fe/H]≤-1.5 are A(Li)NLTE=2.214±0.093 and 2.224±0.075 when the lowest effective temperature considered is taken equal to 5700K and 6000K respectively. This is a factor of ∼2.48 to 2.81 (depending on the adopted SBBN model and on the effective temperature range chosen to delimit the plateau) lower than the CMB+SBBN determination. We find no evidence of intrinsic dispersion. Assuming the correctness of the CMB+SBBN prediction, we are then left with the conclusion that the Li abundance along the plateau is not the pristine one, but that halo stars have undergone surface depletion during their evolution. In the second part of the paper we further dissect our sample in search of new constraints on Li depletion in halo stars. By means of the Hipparcos parallaxes, we derive the evolutionary status of each of our sample stars, and re-discuss our derived Li abundances. A very surprising result emerges for the first time from this examination. Namely, the mean Li value as well as the dispersion appear to be lower (although fully compatible within the errors) for the dwarfs than for the turnoff and subgiant stars. For our most homogeneous dwarfs-only sample with [Fe/H]≤-1.5, the mean Li abundances are A(L)NLTE = 2.177±0.071 and 2.215±0.074 when the lowest effective temperature considered is taken equal to 5700 K and 6000 K respectively. This is a factor of 2.52 to 3.06 (depending on the selected range in Tefffor the plateau and on the SBBN predictions we compare to) lower than the CMB+SBBN primordial value. Instead, for the post-main sequence stars the corresponding values are 2.260±0.1 and 2.235±0.077, which correspond to a depletion factor of 2.28 to 2.52. These results, together with the finding that all the stars with Li abnormalities (strong deficiency or high content) lie on or originate from the hot side of the plateau, lead us to suggest that the most massive of the halo stars have had a slightly different Li history than their less massive contemporaries. In turn, this puts strong new constraints on the possible depletion mechanisms and reinforces Li as a stellar tomographer.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: Population II - stars: evolution - Galaxy: abundances - Galaxy: halo - cosmology: early Universe

VizieR on-line data: <Available at CDS (J/A+A/442/961): table3.dat refs.dat table6.dat>

Simbad objects: 154

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Number of rows : 154

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 97 PM* 00 05 45.9908619144 -19 40 12.889035125   10.402 9.775 9.41   G5V 63 0
2 G 266-60 PM* 00 11 17.6393659206 -20 43 30.743792859   12.31 12.25 11.82   sdF4 24 0
3 HIP 911 ** 00 11 17.64178 -20 43 30.7888           ~ 23 0
4 HD 2665 PM* 00 30 45.4467882867 +57 03 53.626973228 8.66 8.51 7.72     G5IIIw 169 0
5 HD 3567 PM* 00 38 31.9476246205 -08 18 33.395481958 9.54 9.70 9.23     F7/8wF3 196 0
6 BD+71 31 PM* 00 43 44.3495933172 +72 10 43.120084659 10.41 10.60   10.0   F5 69 0
7 SB 960 Pe* 00 44 03.5698517387 -13 55 26.270588506   12.69 12.15 11.806 11.483 CEMP-s 105 0
8 HD 4306 SB* 00 45 27.1608069956 -09 32 39.781797287 9.80 9.75 9.02 8.75   G3/5w(A) 146 0
9 G 33-9 PM* 00 45 33.4385065759 +16 58 17.798176339   11.2   10.2   G0 35 0
10 HD 5426 PM* 00 55 41.0498744897 -33 45 11.454171247   10.32 9.65 9.43 8.76 G(wp) 55 0
11 HD 6755 SB* 01 09 43.0595349996 +61 32 50.293373799 8.48 8.40   7.3   G5 230 0
12 BD+72 94 PM* 01 47 12.3849394550 +73 28 27.192792072 10.10 10.33   9.8   sdF2: 102 0
13 BD-10 388 PM* 01 50 32.6463515122 -09 21 02.838270707   10.78 10.37     F3 88 0
14 BD+29 366 PM* 02 10 24.5274383291 +29 48 23.663384860 9.27 9.35 8.77 8.24 7.85 G3 127 0
15 HD 16031 PM* 02 34 11.0485506243 -12 23 03.445493985 9.99 10.21 9.77     F0V 158 1
16 BD+09 352 ** 02 41 13.6394434954 +09 46 12.096253179 10.37 10.62   10.0   kA7.5hF8 87 0
17 G 4-37 PM* 02 44 35.0877851507 +08 28 50.095043640   11.90   11.0   F7 77 0
18 CD-30 1121 * 02 57 00.2889252098 -30 24 37.381196782   11.038 10.312     G0 39 0
19 HD 19445 PM* 03 08 25.5884 +26 19 51.400 8.29 8.52 8.06 7.60 7.27 G2VFe-3 747 0
20 CD-33 1173 Pe* 03 19 35.3161303154 -32 50 43.157841051   11.272 10.902 10.421 10.152 CEMP 49 0
21 Ross 374 PM* 03 26 59.7727826880 +23 46 35.925129280   11.36   10.6   F5 72 0
22 HD 21581 Pe* 03 28 54.4846692612 -00 25 03.106157430 9.75 9.54 8.71     G8w 120 0
23 BD+66 268 PM* 03 31 17.4003372547 +66 43 49.024023927 10.48 10.57 9.91 9.30 8.87 G0 162 0
24 CD-24 1782 Pe* 03 38 41.4850901452 -24 02 50.291489698   10.54 9.97 9.246 8.811 ~ 73 0
25 HD 24289 PM* 03 51 54.5434322372 -03 49 10.686676166   10.48 9.96     F0V 65 0
26 HD 25704 ** 04 01 44.6318109883 -57 12 24.595289561   8.65 8.10     F7V 139 0
27 HD 284248 PM* 04 14 35.5161833236 +22 21 04.254015290 9.49 9.68 9.23 8.77 8.43 sdG0 172 0
28 HD 29907 SB* 04 38 22.4006754245 -65 24 57.599417729   10.52 9.91     F8V 89 0
29 HD 31128 PM* 04 52 09.9097489102 -27 03 50.940327190   9.55 9.14     F3/5Vw 125 0
30 BD+03 740 HB* 05 01 16.6227347580 +04 06 37.023779331 9.97 10.17   9.6   sdF0 165 0
31 HD 34328 PM* 05 13 05.2763883242 -59 38 44.266050124   9.95 9.46     G0wA8V 123 0
32 CD-29 2277 PM* 05 28 50.9298354847 -29 53 47.777933250   12.13 11.61     F6 63 0
33 HD 251611 PM* 06 05 57.5366070274 +07 19 03.158560957   10.95   10.1   F8 56 0
34 BD+37 1458 PM* 06 16 01.5222776277 +37 43 18.756795213 9.41 9.52 8.92 8.34 7.91 G0 129 0
35 HD 44007 Pe* 06 18 48.5271098810 -14 50 43.424752212   8.85 8.06 7.69   G5(IV)wF3/5 174 0
36 BD+38 1456 PM* 06 20 03.8447493983 +38 20 44.102306855   11.4   10.2   G5 37 0
37 HD 45282 Pe* 06 26 40.7720108507 +03 25 29.794070200 8.71 8.69 8.03     Gwl 143 0
38 G 192-43 PM* 06 47 44.9355583602 +58 38 34.534478265   10.75   10.1   F2 63 0
39 G 88-10 SB* 07 10 23.7929495467 +24 20 40.199462821   12.30   11.7   ~ 51 0
40 BD+19 1730 PM* 07 27 02.3444892309 +19 05 55.447741801 10.99 11.174 10.727 10.418 10.094 sdF8 56 0
41 G 90-3 PM* 07 29 50.8460218901 +32 51 58.313240763   11.0   10.2   sd:F8 66 0
42 BD+24 1676 PM* 07 30 41.2663867705 +24 05 10.250742299   11.15   10.4   F 115 0
43 BD+00 2058A PM* 07 43 43.9667229236 -00 04 00.972592389   10.653 10.202 9.888 9.578 sdF 66 0
44 HD 64090 PM* 07 53 33.1186555870 +30 36 18.263360879 8.75 8.86 8.25 7.70 7.30 K0:V_Fe-3 345 0
45 HD 233511 PM* 08 19 22.5717671718 +54 05 09.627780721 10.02 10.24   9.4   F4 127 0
46 HD 74000 PM* 08 40 50.8038415228 -16 20 42.513275817 9.84 10.09 9.66     F2 251 0
47 BD+25 1981 PM* 08 44 24.6897133760 +24 47 47.745336304   9.65   9.1   F0 132 0
48 G 115-49 PM* 09 05 16.6832497318 +38 47 54.596247670   12.10   11.2   F7 49 0
49 HD 78050 PM* 09 06 42.9265021965 +20 30 35.497351189   9.104   7.2   G0 64 0
50 BD+09 2190 PM* 09 29 15.5616421382 +08 38 00.469417390   11.54   10.8   sdA5 123 0
51 Ross 889 Pe* 09 40 43.2053386236 +01 00 29.514872822       10.39   sdA4 157 0
52 HD 83769 ** 09 40 45.78636 +01 01 29.0180   10.53 10.15 10.12   sdF5 62 0
53 HD 84937 PM* 09 48 56.09801 +13 44 39.3237 8.49 8.68 8.32 7.97 7.70 F8Vm-5 735 0
54 HD 237846 Pe* 09 52 38.6831536740 +57 54 58.617728496   10.60 9.95     CEMP-no 89 0
55 HD 87140 PM* 10 04 43.1807990851 +54 20 43.425447455 9.70 9.68 8.98     K0 107 0
56 V* DR Oct RS* 10 07 29.5259500705 -85 04 32.989590219   9.42 8.685   7.709 G3V 106 0
57 G 43-43 PM* 10 22 07.5216582693 +12 04 37.993915365   14.23   12.229   ~ 18 1
58 BD+29 2091 PM* 10 47 23.1625623007 +28 23 55.928286438   10.72   10.1   F5 130 0
59 HD 94028 PM* 10 51 28.1254469804 +20 16 38.965521484 8.51 8.69 8.22 7.82 7.54 F8 339 0
60 Wolf 365 PM* 11 10 59.9989396644 +06 25 11.471066063   12.13   11.0   sd:G3 78 0
61 HD 97916 SB* 11 15 54.2294079228 +02 05 11.982106821 9.50 9.61   8.9   F0V 159 0
62 BD+04 2466 PM* 11 26 49.1890409114 +03 51 51.646284678   11.22 10.67 10.45   KIIvw 70 0
63 SBS 9 SB* 11 44 17.5782328572 +40 32 17.978744996       11.6   sdF/G 31 0
64 BD-01 2582 Pe* 11 53 37.3233658419 -02 00 36.726031369   10.29 9.60     CEMP-s 98 0
65 HD 103912 PM* 11 58 00.0820225482 +48 12 12.438186701   9.25   7.8   G5V: 66 0
66 BD-04 3208 PM* 12 07 15.0719832426 -05 44 01.609304815   10.40 9.99     A7 139 0
67 Ross 453 PM* 12 10 55.7739013257 +00 23 54.336245712   11.53   10.9   F2 103 0
68 HD 107752 PM* 12 22 52.7183847277 +11 36 25.486889473   10.79 10.07     KIIvw 63 0
69 HD 108177 PM* 12 25 34.9568983381 +01 17 02.259993860 9.87 10.09 9.66 9.21 8.89 F0V 238 0
70 HD 108317 Pe* 12 26 36.8316698542 +05 18 09.021203658       7.7   G2IVm-5 153 0
71 Wolf 1447 PM* 12 34 25.1299006471 +15 16 48.961515844   12.385 11.976 11.676 11.378 A6 63 0
72 BD+28 2137 SB* 12 36 39.4522164624 +27 28 28.157818095   11.29   10.4   sdF2 87 0
73 BD+13 2567 ** 12 39 59.3743409679 +12 38 32.073430514   10.46   9.4   G5 56 0
74 HD 111721 PM* 12 51 25.1948813622 -13 29 28.166794065   8.78 7.97     G6V 149 0
75 BD+10 2495 Pe* 12 59 19.9306193436 +09 14 35.638418393   10.44 9.73     G0 71 0
76 HD 113083 PM* 13 01 26.2705714279 -27 22 28.311075823   8.58 8.05     G1V 96 0
77 BD+51 1817 SB* 13 08 39.1022369959 +51 03 59.234697018       10.0   sdF6 25 0
78 HD 115444 Pe* 13 16 42.4591800169 +36 22 52.695481224   9.77 8.97 8.3 7.88 G9V 230 0
79 HD 116064 Pe* 13 21 43.7823913103 -39 18 39.998476883   9.26 8.81     F9IV-Vm-5 126 0
80 G 255-32 SB* 13 21 47.6257742444 +74 12 32.825003228       11.1   G0 47 0
81 BD+01 2831 SB* 13 36 01.7671065530 +01 12 07.834601311   11.56   10.4   F8 53 0
82 Wolf 1492 Pe* 13 40 02.4921790616 -00 02 18.750321114 11.601 11.832 11.451 11.184 10.892 sdF0: 266 0
83 HD 120559 PM* 13 51 40.3897554726 -57 26 08.293465228 8.679 8.647 7.982 7.605 7.217 G7VFe-1.4CH-1 142 0
84 HD 121004 PM* 13 53 58.1163515488 -46 32 19.526169178   10.112 9.522     G2V 133 0
85 BD+34 2476 PM* 13 59 09.4838035693 +33 51 39.380333439 10.25 10.44   9.7   sdF5 153 0
86 HD 122196 PM* 14 01 02.1244272306 -38 03 03.297565043   9.19 8.75     F0(V)w 111 0
87 Ross 841 Pe* 14 02 30.0901582051 -05 39 05.181328144   11.508 11.149 10.866 10.576 sdA3 143 0
88 HD 126587 Pe* 14 27 00.3636840211 -22 14 38.991614082   9.88 9.60 8.75   CEMP-no 126 0
89 BD+18 2890 HB* 14 32 13.4863319710 +17 25 24.286534152   10.49 9.73     ~ 59 0
90 HD 128279 Pe* 14 36 48.5106582134 -29 06 46.610625293 8.64 8.63 8.00     Gw 181 0
91 BD+26 2606 SB* 14 49 02.3550036151 +25 42 09.136461939 9.92 10.16 9.73 9.27 8.95 A5 357 0
92 Wolf 550 SB* 14 50 07.8015005617 +00 50 27.177034317   11.47   10.8   sd:F5 74 0
93 BD+26 2621 PM* 14 54 10.7124388855 +25 33 48.928656234   11.40   10.7   F0 39 0
94 HD 132475 PM* 14 59 49.7649807130 -22 00 45.814964574 8.98 9.11 8.55     F5/6V 230 1
95 HD 134169 SB* 15 08 18.0562462154 +03 55 50.107808860 8.14 8.22 7.70     F7V 201 0
96 HD 134440 PM* 15 10 12.9678041572 -16 27 46.510775897 10.69 10.217 9.426 8.913 8.441 K2V 264 0
97 HD 134439 PM* 15 10 13.0874231858 -16 22 45.866399625 10.03 9.837 9.066 8.604 8.160 sd:K1Fe-1 306 0
98 Ross 805 PM* 15 32 00.5169424502 -11 22 44.796657216   12.69 12.151 12.10 11.38 F8 23 0
99 HD 140283 Pe* 15 43 03.0967798658 -10 56 00.595803430 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 875 0
100 BD+42 2667 PM* 16 03 13.2989292029 +42 14 46.649595940   10.33   9.6   F5 137 0
101 HD 145417 PM* 16 13 48.5584718157 -57 34 13.843908786 8.663 8.365 7.540 7.054 6.588 K3VFe-1.7 154 0
102 G 180-58 PM* 16 28 16.8724327289 +44 40 38.258152627   11.97   10.6   G5 69 0
103 HD 149414 SB* 16 34 42.3556924921 -04 13 44.634894711 10.48 10.37 9.63     G5Ve 191 0
104 G 202-65 SB* 16 35 58.5823019822 +45 51 59.246231530       10.7   sdF3 39 0
105 G 139-8 PM* 17 01 43.9815778038 +16 09 03.341478802   11.918 11.470 11.128 10.779 sd:F 46 0
106 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1950 0
107 BD+23 3130 Pe* 17 32 41.6248195623 +23 44 11.624030553       8.6   G0III 121 0
108 BD+02 3375 PM* 17 39 45.5950264172 +02 24 59.607595293 10.18 10.40 9.92 9.47 9.12 A5 190 0
109 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1840 1
110 HD 160617 PM* 17 42 49.3235999900 -40 19 15.505712142   9.18 8.73 8.394 8.065 G0 188 0
111 BD-08 4501 PM* 17 47 27.9713460047 -08 46 47.733691581   11.18 10.59     sdF8 115 0
112 HD 161770 PM* 17 47 46.0757888339 -09 36 18.444031860 10.38 10.39 9.71 9.04 8.55 F3V 91 0
113 BD+36 2964 PM* 17 52 18.0527986479 +36 24 06.618070604       10.2   sd:F8 32 0
114 BD+20 3603 PM* 17 54 43.2306261669 +20 16 16.443521966   10.13   9.6   F0 152 0
115 HD 163810 ** 17 58 38.4538029750 -13 05 49.654844460 10.15 10.23 9.63     G3V 139 0
116 BD+01 3597 PM* 18 07 56.5964043215 +01 52 32.700438137   11.53   10.8   sdF5 61 0
117 HD 166913 PM* 18 16 25.6833261555 -59 24 11.241154880   8.66 8.23     F5/7Vw 125 0
118 BD+13 3683 SB* 18 33 16.8451410333 +13 09 25.490354259   11.19   10.0   F5 96 0
119 Ross 711 SB* 18 35 19.1686791536 +28 41 55.413970670   11.83   11.2   A8 90 0
120 HD 175305 Pe* 18 47 06.4424234462 +74 43 31.448124921 8.07 7.93 7.18 6.52 6.03 G5III 202 0
121 BD+42 3187 RG* 18 54 16.9545538305 +42 59 00.382313454       9.6   G2 75 0
122 HD 181743 PM* 19 23 42.7454549059 -45 04 56.915607302   10.13 9.71     F4 102 0
123 HD 338529 PM* 19 32 31.9104538188 +26 23 26.116678290   9.72   9.2   B5 202 0
124 HD 188510 PM* 19 55 09.6783577203 +10 44 27.395091177 9.30 9.41   8.5   G5V: 239 0
125 HD 189558 PM* 20 01 00.2452564415 -12 15 20.355884232   8.27 7.72     F8/G2V 175 1
126 HD 190287 PM* 20 05 38.2683033701 -34 55 11.945413960   9.23 8.54     G6Vw 58 0
127 G 24-3 PM* 20 05 44.3170613889 +04 02 52.811312960   10.92   10.2   sdF8 84 0
128 BD+42 3607 PM* 20 09 01.4133036647 +42 51 54.929695847       9.9   F3 80 0
129 HD 345957 PM* 20 10 48.1626273226 +23 57 54.507927464   9.36   8.6   G0V: 134 0
130 HD 193901 PM* 20 23 35.8472360557 -21 22 14.228814044 9.08 9.22 8.67 8.17 7.87 F7V 262 0
131 HD 340279 PM* 20 24 45.4127587189 +25 03 07.108270663   11.23   10.7   A5 97 0
132 HD 194598 PM* 20 26 11.9185966774 +09 27 00.429262518 8.62 8.82 8.34 7.90 7.56 F8 291 0
133 CD-30 18140 PM* 20 44 06.2871219229 -30 00 07.598765502   10.326 9.932     F8 79 0
134 BD+04 4551 PM* 20 48 50.7247200687 +05 11 58.817666311   10.13 9.67 9.61   F7Vw 72 0
135 BD+41 3931 PM* 20 55 16.7552935756 +42 18 00.676419326       10.0   G5 88 0
136 HD 358059 Pe* 20 56 09.1348741356 -13 31 17.689533403   11.016 10.192     G0 51 0
137 HD 200654 Pe* 21 06 34.7513502011 -49 57 50.282535600   9.74 9.11     CEMP 95 0
138 HD 201781 * 21 11 58.8152091535 -05 57 49.681140903   8.41 8.29     A2/3V 14 0
139 HD 201891 PM* 21 11 59.0322335571 +17 43 39.888647667 7.74 7.88 7.37 6.91 6.59 G5V_Fe-2.5 372 0
140 HD 201889 ** 21 11 59.52350 +24 10 05.3897 8.60 8.64 8.05 7.52 7.15 G1V 151 0
141 CD-35 14849 PM* 21 33 49.75243 -35 26 14.2322   10.95 10.56 10.59   B8 65 0
142 Wolf 1143 PM* 21 55 16.1464999391 +32 38 41.147785186   11.69   10.6   G2V 70 0
143 BD+17 4708 SB* 22 11 31.3751899315 +18 05 34.158392398 9.73 9.91 9.46 9.03 8.70 sdF8 545 0
144 BD+07 4841 PM* 22 18 36.5061308735 +08 26 44.960669943   10.84   10.1   G0 104 0
145 L 1077-30 SB* 22 31 36.2188936592 +02 09 43.831512451   11.24   10.5   sd:F7 63 0
146 HD 213657 PM* 22 33 47.0565944504 -42 03 13.792590617   10.08 9.66     (G0)w(A) 86 0
147 HD 218502 PM* 23 08 39.3725624892 -15 03 11.944865393   8.65 8.25     F(3)w 91 0
148 HD 218857 PM* 23 11 24.5948588495 -16 15 04.029541995   9.60 8.95     G5/8w(a) 104 0
149 BD+38 4955 SB* 23 13 38.8187105205 +39 25 02.595560170 11.52 11.67 11.01 10.38 9.92 F6 114 0
150 HD 219617 ** 23 17 05.04375 -13 51 03.5971 8.41 8.60 8.14 7.70 7.37 F8 301 0
151 BD+02 4651 PM* 23 19 40.4501666092 +03 22 16.692679350   10.67   9.9   sdF6 104 0
152 BD+59 2723 SB* 23 26 32.8392598208 +60 37 42.780833605 10.74 10.92   10.1   sdF8 97 0
153 Wolf 1043 SB* 23 50 01.3653636600 +08 43 23.375798420   11.88   11.1   sd:F8 49 0
154 CD-31 19466 PM* 23 50 12.5190338190 -30 34 21.206955318   11.824 11.393 11.18 10.96 ~ 18 0

    Equat.    Gal    SGal    Ecl

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2021.06.22-09:58:13

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