1995A&A...295L..47M

Query : 1995A&A...295L..47M

1995A&A...295L..47M - Astronomy and Astrophysics, volume 295L47-50 (1995/3-3)

Lithium abundance of halo dwarfs revised.

MOLARO P., PRIMAS F. and BONIFACIO P.

Abstract (from CDS):

Lithium abundances in a sample of halo dwarfs have been redetermined by using the new Teff derived by Fuhrmann et al. (1994A&A...285..585F) from modelling of the Balmer lines. These Teff are reddening independent, homogeneous and of higher quality than those based on broad band photometry. Abundances have been derived by generating new atmospheric models by using the ATLAS-9 code by Kurucs (1993, CD-Rom No 11, 13, 18) with enhanced α-elements and without the overshooting option. The revised abundances show a remarkably flat plateau in the Li-Teff plane for Teff>5700K with no evidence of trend with Teff or falloff at the hottest edge. Li abundances are not correlated with metallicity for [Fe/H]←1.4 in contrast with Thorburn (1994ApJ...421..318T). All the determinations are consistent with the same pristine lithium abundance and the errors estimated for individual stars fully account for the observed dispersion. The weighted average Li value for the 24 stars of the plateau with Teff>5700K and [Fe/H]←1.4, is [Li]=2.210+0.013, or 2.224 when non-LTE corrections by Carlsson et al. (1994A&A...288..860C) are considered.

Abstract Copyright: ∼

Journal keyword(s): Stars: abundances - Stars: Population II - Stars: fundamental parameters - Galaxy: halo - Cosmology: observations

Simbad objects: 39

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Number of rows : 39
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 HD 3567 PM* 00 38 31.9473242153 -08 18 33.392826667 9.54 9.70 9.23     F7/8wF3 221 0
2 BD+29 366 PM* 02 10 24.5274364299 +29 48 23.663397433 9.27 9.35 8.77 8.24 7.85 G3 146 0
3 BD+09 352 ** 02 41 13.6396003457 +09 46 12.100750635 10.37 10.62 10.1 10.0   kA7.5hF8 109 0
4 HD 19445 Pe* 03 08 25.5883873084 +26 19 51.400965175 8.29 8.52 8.06 7.60 7.27 G2VFe-3 801 0
5 BD+66 268 PM* 03 31 17.4003449284 +66 43 49.024902152 10.48 10.57 9.91 9.30 8.87 G0 181 0
6 HD 284248 Pe* 04 14 35.5161858536 +22 21 04.252516252 9.49 9.68 9.23 8.77 8.43 sdG0 200 0
7 BD+03 740 HB* 05 01 16.6226363256 +04 06 37.021736844 9.97 10.17 9.7 9.6   sdF0 182 0
8 BD+37 1458 Pe* 06 16 01.5222885381 +37 43 18.754343426 9.41 9.52 8.92 8.34 7.91 G0 146 0
9 BD+24 1676 Pe* 07 30 41.2662525096 +24 05 10.248524088   11.15 10.7 10.4   F 139 0
10 HD 64090 Pe* 07 53 33.1208795337 +30 36 18.256204963 8.75 8.86 8.25 7.70 7.30 K0:V_Fe-3 374 0
11 HD 74000 Pe* 08 40 50.8036114756 -16 20 42.516208237 9.84 10.09 9.66     F2 279 0
12 BD+09 2190 Pe* 09 29 15.5615542183 +08 38 00.467004388   11.54   10.8   sdA5 144 0
13 Ross 889 Pe* 09 40 43.2053340378 +01 00 29.511836741       10.39   sdA4 166 0
14 HD 108177 PM* 12 25 34.9568267745 +01 17 02.259553591 9.87 10.09 9.66 9.21 8.89 F0V 266 0
15 HD 116064 Pe* 13 21 43.7779908364 -39 18 40.025179966   9.26 8.8     F9IV-Vm-5 137 0
16 G 255-32 SB* 13 21 47.6238772026 +74 12 32.820477741       11.1   G0 53 0
17 Wolf 1492 Pe* 13 40 02.4921849768 -00 02 18.750053436 11.601 11.832 11.451 11.184 10.892 sdF0: 299 0
18 HD 118926 PM* 13 40 07.1314492114 -04 11 09.980813972 12.212 11.008 9.589 8.71 7.889 K5V 92 0
19 Ross 841 Pe* 14 02 30.0900761861 -05 39 05.181979951   11.508 11.149 10.866 10.576 sdA3 161 0
20 G 239-12 PM* 14 18 52.5510798024 +73 14 14.711086500       11.3   ~ 27 0
21 G 66-9 Pe* 14 35 12.7359317489 +12 13 19.278257815   12.438 11.968 11.650 11.306 ~ 42 0
22 BD+26 2606 SB* 14 49 02.3593347728 +25 42 09.192358874 9.92 10.16 9.73 9.27 8.95 A5 383 0
23 HD 140283 Pe* 15 43 03.0971190219 -10 56 00.595693188 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 985 0
24 BD+23 3130 Pe* 17 32 41.6247211304 +23 44 11.625460773     8.9 8.6   G0III 144 0
25 BD+02 3375 Pe* 17 39 45.5948675731 +02 24 59.606824535 10.18 10.40 9.92 9.47 9.12 A5 205 0
26 HD 160617 Pe* 17 42 49.3234249010 -40 19 15.503834657   9.18 8.7 8.394 8.065 G0 220 0
27 HD 166913 PM* 18 16 25.6832938176 -59 24 11.239435980   8.66 8.23     F5/7Vw 142 0
28 Ross 711 SB* 18 35 19.1686289616 +28 41 55.415394492   11.83 11.4 11.2   A8 101 0
29 HD 188510 PM* 19 55 09.6782304000 +10 44 27.398607828 9.30 9.41   8.5   G5V: 264 0
30 HD 189558 PM* 20 01 00.2452184673 -12 15 20.353638621   8.28 7.73     F8/G2V 202 0
31 BD+42 3607 Pe* 20 09 01.4132638739 +42 51 54.930960323     10.1 9.9   F3 90 0
32 HD 193901 PM* 20 23 35.8471605389 -21 22 14.226959304 9.08 9.22 8.67 8.17 7.87 F7V 298 0
33 HD 194598 PM* 20 26 11.9183775668 +09 27 00.429558608 8.62 8.82 8.34 7.90 7.56 F8 315 0
34 HD 200654 Pe* 21 06 34.7513254468 -49 57 50.280288000   9.74 9.1     CEMP 118 0
35 HD 201891 Pe* 21 11 59.0321495469 +17 43 39.890919730 7.74 7.88 7.37 6.91 6.59 G5V_Fe-2.5 409 0
36 HD 201889 ** 21 11 59.52350 +24 10 05.3897 8.60 8.64 8.05 7.52 7.15 G1V 163 0
37 BD+17 4708 SB* 22 11 31.3756832854 +18 05 34.177983548 9.73 9.91 9.46 9.03 8.70 sdF8 580 0
38 BD+38 4955 SB* 23 13 38.8205905578 +39 25 02.589638688 11.52 11.67 11.01 10.38 9.92 F6 128 0
39 HD 219617 ** 23 17 05.04375 -13 51 03.5971 8.41 8.60 8.14 7.70 7.37 F8 317 0

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