2002A&A...381..971H

Query : 2002A&A...381..971H

2002A&A...381..971H - Astronomy and Astrophysics, volume 381971-981 (2002/1-3)

The accretion/diffusion theory for λ Bootis stars in the light of spectroscopic data.

HEITER U., WEISS W.W. and PAUNZEN E.

Abstract (from CDS):

Most of the current theories suggest the λ Bootis phenomenon to originate from an interaction between the stellar surface and its local environment. In this paper, we compare the abundance pattern of the λ Bootis stars to that of the interstellar medium and find larger deficiencies for Mg, Si, Mn and Zn than in the interstellar medium. A comparison with metal poor post-AGB stars showing evidence for circumstellar material indicates a similar physical process possibly being at work for some of the λ Bootis stars, but not for all of them. Despite the fact that the number of spectroscopically analysed λ Bootis stars has considerably increased in the past, a test of predicted effects with observations shows current abundance and temperature data to be still controversial.

Abstract Copyright: ∼

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

Simbad objects: 75

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Number of rows : 75
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 319 PM* 00 07 46.8995868600 -22 30 30.805174800   6.055 5.923     A1VbmA2_lB 112 0
2 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1253 0
3 V* BD Phe dS* 01 50 54.4352128992 -50 12 22.092503544   6.080 5.929     F0VkA2mA2_lB 110 0
4 HD 15165 dS* 02 26 45.6478667280 +10 33 55.070566704   6.94 6.69     F0IV 97 0
5 HD 18100 bC? 02 53 40.8050199600 -26 09 20.428125408   8.23 8.44     B5II/III 104 0
6 HD 22586 * 03 35 38.0490446928 -52 33 23.927820948 6.93 7.85 8.03     B1/2III 72 0
7 * zet Per s*b 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 881 0
8 * eps Per bC* 03 57 51.2393818140 +40 00 36.719213615 1.71 2.71 2.89 2.96 3.14 B0.5III 533 0
9 * ksi Per ** 03 58 57.9024302099 +35 47 27.709515737 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 850 0
10 * pi.01 Ori PM* 04 54 53.7280989194 +10 09 03.003446941   4.723 4.648     A0Va_lB 268 0
11 * 23 Ori SB* 05 22 50.0039865384 +03 32 40.051458204 3.99 4.86 5.00 5.05 5.23 B2IV/V 258 0
12 * del Ori ** 05 32 00.40009 -00 17 56.7424 0.96 2.02 2.41 2.32 2.54 O9.5IINwk 796 0
13 * lam Ori A Em* 05 35 08.2760807112 +09 56 02.991326316 2.17 3.48 3.47     O8III((f)) 527 0
14 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
15 * iot Ori SB* 05 35 25.9861932063 -05 54 35.598684624 1.45 2.53 2.77     O9IIIvar 793 0
16 * eps Ori s*b 05 36 12.81335 -01 12 06.9089 0.48 1.51 1.69 1.76 1.93 B0Ia 921 0
17 * mu. Col V* 05 45 59.8950238944 -32 18 23.162261796 3.84 4.90 5.18 5.30 5.57 O9.5V 523 0
18 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 2087 1
19 * kap Ori s*b 05 47 45.3888404 -09 40 10.577707 0.87 1.88 2.06 2.09 2.27 B0.5Ia 588 0
20 * bet CMa bC* 06 22 41.9853527 -17 57 21.307352 0.77 1.73 1.97 2.11 2.35 B1II-III 748 0
21 * 15 Mon Be* 06 40 58.65963 +09 53 44.7229 3.360 4.45 4.68   4.88 O7V+B1.5/2V 823 0
22 * tau CMa SB* 07 18 42.4849951654 -24 57 15.700749738 3.26 4.25 4.40 4.44 4.62 O9II 439 0
23 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
24 HD 72089 * 08 29 06.9713523240 -45 33 26.963586252   7.93 8.02     B5II/III 40 0
25 * 50 Cnc PM* 08 46 56.0189914848 +12 06 35.830080180   5.992 5.885 7.20 5.76 A1Vp 99 0
26 HD 75654 dS* 08 49 52.3521972168 -39 08 29.771430000   6.602 6.368     A2/3II/III 78 0
27 HD 81290 Pe* 09 23 02.0651900592 -49 03 30.794478948   9.15 8.89     F4VkA3mA3_lB? 58 0
28 V* AK Ant dS* 09 34 56.5518460560 -28 52 39.334572984   9.10 8.79     F1VkA3mA3_lB? 64 0
29 HD 84123 PM* 09 44 06.8766339648 +42 03 03.128528304   7.135 6.838     A4III 59 0
30 HD 84948 SB* 09 50 05.8773671472 +49 04 31.750535568   8.42 8.12     F0 59 0
31 * rho Leo s*b 10 32 48.6703908997 +09 18 23.705339948 2.780 3.720 3.870 3.90 4.06 B1Iab 550 0
32 HD 93521 * 10 48 23.5113981120 +37 34 13.083332412 5.67 6.79 7.03     O9.5IIInn 443 1
33 HD 100340 HS? 11 32 49.9414410936 +05 16 36.231905676 8.906 9.881 10.115 10.219 10.353 B0 105 0
34 HD 101108 * 11 38 19.3666459704 +38 45 16.889006304   9.05 8.87     A5_lB 45 0
35 V* II Vir dS* 12 10 27.1880699112 -07 46 26.311095696   6.73 6.54     A3III 33 0
36 HD 106223 Em* 12 13 16.8983653416 +30 16 58.946364228 7.64 7.72 7.44     hF3VkA3mA3_lB 94 0
37 HD 107233 PM* 12 19 55.6448625816 -48 18 59.471119476   7.60 7.36     F0VkA3mA2_lB 47 0
38 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
39 HD 109738 * 12 37 38.0633553648 -67 51 53.379084672   8.50 8.30     hA9VnkA0mA0_lB 39 0
40 * rho Vir dS* 12 41 53.0569475088 +10 14 08.252569320 5.00 4.97 4.88 4.80 4.78 A0Va_lB 232 0
41 HD 111005 * 12 46 14.8230470856 +02 27 51.461399556   8.30 7.97     A9V 47 0
42 HD 116852 * 13 30 23.5185791544 -78 51 20.547734652 8.29 8.38 8.47     O8.5II-III((f)) 163 1
43 HD 120086 V* 13 47 19.1951783352 -02 26 36.605621724 6.92 7.65 7.82     B2IV 98 0
44 * lam Boo dS* 14 16 23.0184083839 +46 05 17.895459693 4.31 4.26 4.18 4.16 4.13 A0Va_lB 362 0
45 * b Sco * 15 50 58.7444628720 -25 45 04.658676984 3.84 4.552 4.635     B1.5Vn 305 0
46 V* HR Lib dS* 15 56 33.3736378344 -14 49 45.972944112   6.345 6.117     F1VskA1.5mA1.5_lB 127 0
47 * pi. Sco SB* 15 58 51.1132378 -26 06 50.788602 1.82 2.71 2.91 3.00 3.20 B1V+B2:V: 415 0
48 * bet01 Sco bC* 16 05 26.2319826 -19 48 19.630018 1.68 2.55 2.62 2.60 2.69 B1V 577 0
49 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 898 0
50 V* V600 Her SB* 16 36 58.2040305408 +14 28 30.910523016 5.87 6.845 7.028     B0.5III 165 0
51 NAME zet Oph Cloud Cld 16 37 09 -10 34.0           ~ 114 0
52 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 0
53 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 316 0
54 HD 156954 * 17 21 00.3553285752 -13 05 07.621955772   7.97 7.67     F0.5VkA9mA9 49 1
55 * gam Ara Be* 17 25 23.6593111 -56 22 39.814775 2.25 3.21 3.34     B1Ib 281 0
56 * lam Sco bC* 17 33 36.52012 -37 06 13.7648 0.52 1.49 1.63     B2IV+DA7.9 404 0
57 * gam Oph PM* 17 47 53.5605898827 +02 42 26.204838837 3.83 3.80 3.75 3.71 3.71 A1VnkA0mA0 411 0
58 HD 167756 s*b 18 18 40.1582045736 -42 17 18.223045728 5.18 6.143 6.290     B0.2Ib 106 0
59 HD 169142 Ae* 18 24 29.7799891464 -29 46 49.327400568   8.42 8.16     F1VekA3mA3_lB? 535 0
60 HD 168740 dS* 18 25 31.6299933048 -63 01 17.529458664   6.313 6.122     A8VkA2mA2_lB 78 0
61 HD 170680 * 18 31 26.2978449720 -18 24 09.713977668   5.126 5.117     B9/9.5V 87 0
62 BD+21 3494B * 18 36 35.7186997872 +22 06 19.469833740     11.7     ~ 5 0
63 HD 171948 SB* 18 36 37.0229804112 +22 06 27.294803964   6.82 6.77     B9 40 1
64 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
65 * c Aql dS* 19 29 00.9869402808 +01 57 01.616825124   5.865 5.783     A0IVp 188 0
66 * b03 Cyg dS* 20 14 32.0323540824 +36 48 22.700909124 5.10 5.11 4.99 4.79 4.72 A2V 284 0
67 HD 193256 * 20 20 26.5730016024 -29 11 28.700728368   7.703 7.525 8.49   A8VnkA3mA3(_lB) 67 0
68 HD 193281 * 20 20 27.8803232880 -29 11 49.972752276   6.76 6.64 7.50   A2IV-V 105 0
69 CD-62 1338A PM* 20 51 38.5075523160 -62 25 45.585188364   6.35 6.21 6.55   A3IV(n) 74 0
70 CD-62 1338B PM* 20 51 38.8562846352 -62 25 45.255818352   6.74 6.56     A3III 38 0
71 HD 204041 PM* 21 25 51.5848015320 +00 32 03.634403820   6.593 6.450     A1Vb 114 0
72 HD 210111 dS* 22 08 42.6440819592 -33 07 32.494799028   6.564 6.386     A9VkA2mA2_lB 88 0
73 * pi. Aqr Be* 22 25 16.6230017410 +01 22 38.634449478 3.64 4.60 4.64 4.48 4.48 B1III-IVe 436 0
74 HD 215733 s*b 22 47 02.5068538440 +17 13 58.983960504 6.37 7.21 7.34     B1Ib 130 0
75 * 15 And dS* 23 34 37.5368337288 +40 14 11.182658856   5.652 5.563 6.91   A1Va 141 0

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