2005MNRAS.358..193L

Query : 2005MNRAS.358..193L

2005MNRAS.358..193L - Mon. Not. R. Astron. Soc., 358, 193-201 (2005/March-3)

Surface abundances of light elements for a large sample of early B-type stars - IV. The magnesium abundance in 52 stars - a test of metallicity.

LYUBIMKOV L.S., ROSTOPCHIN S.I., RACHKOVSKAYA T.M., POKLAD D.B. and LAMBERT D.L.

Abstract (from CDS):

From high-resolution spectra a non-local thermodynamic equilibrium analysis of the Mgii 4481.2-Åfeature is implemented for 52 early and medium local B stars on the main sequence (MS). The influence of the neighbouring line Aliii 4479.9-Åis considered. The magnesium abundance is determined; it is found that logε(Mg) = 7.67±0.21 on average. It is shown that uncertainties in the microturbulent parameter Vt are the main source of errors in logε(Mg). When using 36 stars with the most reliable Vt values derived from Oii and Nii lines, we obtain the mean abundance logε(Mg) = 7.59±0.15. The latter value is precisely confirmed for several hot B stars from an analysis of the Mgii 7877-Åweak line. The derived abundance logε(Mg) = 7.59±0.15 is in excellent agreement with the solar magnesium abundance logε☉(Mg) = 7.55±0.02, as well as with the proto-Sun abundance logεps(Mg) = 7.62±0.02. Thus, it is confirmed that the Sun and the B-type MS stars in our neighbourhood have the same metallicity.

Abstract Copyright: 2005 RAS

Journal keyword(s): stars: abundances - stars: atmospheres - stars: early-type

Simbad objects: 53

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Number of rows : 53
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 829 Pu* 00 12 50.2449532560 +37 41 37.165885188 5.9 6.577 6.708     B3III 75 0
2 HD 11857 V* 01 58 33.2351547624 +61 41 52.045134828   5.963 6.004     B7I 64 0
3 V* KP Per bC* 03 32 38.9776919424 +44 51 20.734775568 5.7 6.44 6.41     B2IV 133 0
4 * d Eri * 04 20 42.8341039320 -07 35 32.985711240 5.23 5.710 5.838     B7II 78 0
5 HD 31726 * 04 57 44.6845893336 -14 13 54.901969680   5.939 6.139     B2V 136 0
6 * psi Eri ** 05 01 26.3457823592 -07 10 26.273231188 3.87 4.61 4.78     B3IV 114 0
7 HD 32612 * 05 03 52.1246868960 -14 22 12.827588844   6.223 6.406     B2IV 87 0
8 HD 34447 * 05 16 48.2644219272 -17 08 32.422490916   6.385 6.548     B2V 63 0
9 HD 34798 Pu* 05 19 17.4371850792 -18 31 11.705799792 5.65 6.23 6.39     B5Vs 93 0
10 * lam Lep ** 05 19 34.5223081894 -13 10 36.369844928 3.03 4.04 4.29 4.41 4.69 B0.5V 322 0
11 * 8 Lep SB* 05 23 30.1560451200 -13 55 38.470509624   5.026 5.229     B2IV 88 0
12 HD 35299 Pu* 05 23 42.3086240496 -00 09 35.347024692 4.610 5.490 5.700 5.77 5.96 B1.5V 217 0
13 * o Tau * 05 27 38.0841633883 +21 56 13.085083102 3.98 4.719 4.868     B2.5V 168 0
14 HD 35912 * 05 28 01.4701489584 +01 17 53.700185940 5.52 6.212 6.380     B2V 167 0
15 HD 36285 * 05 30 20.7537108216 -07 26 05.338118076 5.29 6.130 6.313     B2V 130 0
16 HD 36430 * 05 31 20.8933113744 -06 42 30.168166680 5.29 6.041 6.208     B3V 144 0
17 * ups Ori SB* 05 31 55.8599595648 -07 18 05.535884975 3.30 4.36 4.63 4.75 5.01 O9.7V 426 0
18 HD 36591 V* 05 32 41.3510096736 -01 35 30.595447356 4.240 5.15 5.34     B1IV 255 0
19 HD 36959 Y*O 05 35 01.0070120496 -06 00 33.366713364 4.52 5.33 5.53     B1V 223 0
20 HD 36960 * 05 35 02.6823091513 -06 00 07.308349203 3.52 4.50 4.72     B0.5V 283 0
21 HD 37356 V* 05 37 53.3851682160 -04 48 50.525298828 5.42 6.14 6.18 6.11 6.11 B3V 153 0
22 HD 37744 V* 05 40 37.2968503824 -02 49 30.852237396 5.14 6.02 6.22     B1.5V 164 0
23 HD 39777 * 05 54 34.6960877928 -04 03 52.967826720 5.58 6.381 6.551     B2III/IV 101 0
24 HD 42690 * 06 11 51.8143365264 -06 33 01.020314772 4.07 4.848 5.040     B2V 106 0
25 HD 43112 * 06 15 08.4727512648 +13 51 03.959285616 4.7 5.676 5.894     B1V 126 0
26 * 16 Mon SB* 06 46 32.4145190352 +08 35 13.767386136   5.76 5.92     B3V 99 0
27 HD 49567 * 06 49 03.6560827200 +01 00 07.442689536 5.34 6.001 6.150     B3III 81 0
28 * eps CMa * 06 58 37.54876 -28 58 19.5102 0.36 1.29 1.50 1.59 1.80 B1.5II 519 0
29 HD 52140 * 06 58 43.6970349912 -30 59 52.929503196   6.245 6.395     B3V 49 0
30 HD 52559 * 07 01 55.2600175944 +05 33 25.752763980 5.93 6.544 6.578     B2IV-V 70 0
31 HD 54224 * 07 06 59.9877926760 -26 39 24.328389924 5.63 6.417 6.591     B3III 63 0
32 HD 55879 * 07 14 28.2529558464 -10 18 58.483822572 4.88 5.85 6.03 7.35   O9.7III 180 0
33 HD 56342 * 07 15 21.0681331056 -30 41 11.217833988   5.182 5.337     B2V 67 0
34 HD 58325 * 07 23 54.4330933464 -30 13 01.243270092 5.6 6.404 6.587     B2III 58 0
35 V* PT Pup bC* 07 36 41.0352383592 -19 42 08.425020168 4.65 5.524 5.699     B2III 155 0
36 HD 63271 * 07 47 12.5542841784 -22 31 10.235001252 4.90 5.68 5.87     B1/2V 76 0
37 * iot Her bC* 17 39 27.8868980278 +46 00 22.792978043 2.940 3.630 3.800     B3IV 470 1
38 * 102 Her * 18 08 45.4919267342 +20 48 52.404584093 3.38 4.177 4.347     B2IV 194 0
39 HD 170580 ** 18 30 05.1198164760 +04 03 55.271232360 6.29 6.80 6.69     B2V 106 0
40 HD 170740 SB* 18 31 25.6939245072 -10 47 45.008376432 5.51 5.96 5.72     B2V+ 210 1
41 * 8 Cyg Pu* 19 31 46.3218386 +34 27 10.687443 3.95 4.60 4.72     B3IV 130 0
42 * kap Aql * 19 36 53.4488871022 -07 01 38.924816492 4.050 4.930 4.960 4.90 4.94 B0.5IIIn 354 0
43 HD 196035 Pu* 20 34 09.9833064792 +20 59 06.671076828 5.66 6.336 6.470     B3IV 65 0
44 * 51 Cyg * 20 42 12.6305206584 +50 20 24.066965544 4.64 5.286 5.401     B2V 86 0
45 HD 198820 * 20 52 00.3893179704 +32 50 56.029508808 5.67 6.29 6.44     B3III 89 0
46 * 18 Peg * 22 00 07.9250290512 +06 43 02.810180604 5.31 5.88 6.00     B3III 119 0
47 HD 209419 * 22 01 50.5866647688 +52 52 56.100144360 5.14 5.658 5.776     B5III 71 0
48 * 35 Aqr * 22 08 58.9903231176 -18 31 10.536229236   5.629 5.793     B2III 94 0
49 HD 212883 ** 22 26 45.55822 +37 26 37.3406 5.57         B2V+B9Vn 92 0
50 HD 212986 * 22 26 59.1778485600 +56 26 00.838979844   6.472 6.577     B7III 58 0
51 HD 217811 V* 23 02 45.1478611209 +44 03 31.498436363 5.8 6.38 6.42     B2V 85 1
52 * 1 Cas * 23 06 36.8177774777 +59 25 11.135356051 3.93 4.771 4.840     B0.5III 254 0
53 HD 223128 bC? 23 46 36.7365639936 +66 46 56.081325468 5.15 5.883 5.937     B2IV 74 0

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