1994A&A...284..138W

Query : 1994A&A...284..138W

1994A&A...284..138W - Astronomy and Astrophysics, volume 284138-144 (1994/4-1)

Evolution of initially mixed massive main sequence stars.

WEISS A.

Abstract (from CDS):

The main sequence evolution of massive stars is calculated under the assumption that an unspecified mixing process were able to keep the models homogeneous during some fraction of the core hydrogen burning phase. The mixing could be due to rotation. The results are used to discuss discrepancies in stellar parameters between recent spectral analyses of OB stars and standard stellar evolution theory. The observed surface helium abundances serve as input to determine the duration of the mixing. It is shown that mixing on the main sequence alone cannot explain the derived values, although the agreement becomes much better when using the tracks presented here.

Abstract Copyright: ∼

Journal keyword(s): stars: early type - stars: evolution - stars: abundances - stars: interiors

Simbad objects: 25

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Number of rows : 25
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 13268 * 02 11 29.7003301008 +56 09 31.721738760 7.48 8.24 8.18     ON8.5IIIn 186 0
2 HD 18409 * 03 00 29.7126315336 +62 43 19.052057856 9.832 8.72 8.40     O9.7Ib 84 0
3 * 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
4 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 597 1
5 HD 34656 Em* 05 20 43.0812017952 +37 26 19.195066068 5.87 6.77 6.76     O7.5II(f) 213 0
6 HD 46150 Y*O 06 31 55.5205071744 +04 56 34.296516096 6.03 6.86 6.73 6.50 6.41 O5V((f))z 413 0
7 HD 46966 ** 06 36 25.8880460976 +06 04 59.474397540 5.91 6.83 6.87     O8.5IV 218 0
8 * 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
9 * 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
10 HD 227018 * 19 59 49.1028248712 +35 18 33.550210836 8.75 9.35 9.00     O6.5V((f))z 110 0
11 HD 190864 Em* 20 05 39.8022808800 +35 36 27.991297908 7.18 7.93 7.78     O6.5III(f) 233 0
12 HD 227634 * 20 06 01.3607379984 +35 45 55.906783272 7.03 8.17 7.92     B0.2II 78 0
13 HD 227757 * 20 07 12.7698932544 +36 21 33.434934012 8.63 9.41 9.27     O9.5V 64 0
14 HD 191423 * 20 08 07.1135347944 +42 36 21.962454480 7.43 8.19 8.03     ON9II-IIInn 119 0
15 HD 191612 SB* 20 09 28.6105997664 +35 44 01.286453904 7.40 8.07 7.80     O8fpe 250 0
16 HD 228199 * 20 11 27.2647005336 +36 29 56.857195608   9.41 9.34     B0.5:V 35 0
17 HD 192639 s*b 20 14 30.4275801672 +37 21 13.816276704 6.83 7.46 7.11     O7.5Iabf 309 0
18 HD 193514 Em* 20 19 08.4971150880 +39 16 24.253036608 7.32 7.83 7.38     O7Ib(f) 193 0
19 HD 193682 Em* 20 20 08.9387110032 +37 49 51.313158876 8.44 8.87 8.42     O4.5IV(f) 95 0
20 * 68 Cyg SB* 21 18 27.1862219256 +43 56 45.399147864 4.05 4.99 5.00     O7.5IIIn((f)) 383 0
21 HD 207198 Y*? 21 44 53.2791389640 +62 27 38.048647248 5.61 6.25 5.94 5.66 5.49 O8.5II 365 0
22 * 19 Cep * 22 05 08.7897533088 +62 16 47.332569936 4.36 5.19 5.11 4.95 4.92 O9Ib 397 0
23 HD 210809 s*b 22 11 38.6004719208 +52 25 47.950615308 6.7 7.61 7.56     O9Iab 223 0
24 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 790 0
25 HD 217086 Y*O 22 56 47.1887590800 +62 43 37.657173900 7.88 8.30 7.66 8.35   O7Vnn((f))z 263 0

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