2014ApJ...781...88A

Query : 2014ApJ...781...88A

2014ApJ...781...88A - Astrophys. J., 781, 88 (2014/February-1)

The surface nitrogen abundance of a massive star in relation to its oscillations, rotation, and magnetic field.

AERTS C., MOLENBERGHS G., KENWARD M.G. and NEINER C.

Abstract (from CDS):

We have composed a sample of 68 massive stars in our galaxy whose projected rotational velocity, effective temperature, and gravity are available from high-precision spectroscopic measurements. The additional seven observed variables considered here are their surface nitrogen abundance, rotational frequency, magnetic field strength, and the amplitude and frequency of their dominant acoustic and gravity modes of oscillation. A multiple linear regression to estimate the nitrogen abundance combined with principal component analysis, after addressing the incomplete and truncated nature of the data, reveals that the effective temperature and the frequency of the dominant acoustic oscillation mode are the only two significant predictors for the nitrogen abundance, while the projected rotational velocity and the rotational frequency have no predictive power. The dominant gravity mode and the magnetic field strength are correlated with the effective temperature but have no predictive power for the nitrogen abundance. Our findings are completely based on observations and their proper statistical treatment and call for a new strategy in evaluating the outcome of stellar evolution computations.

Abstract Copyright: ∼

Journal keyword(s): methods: statistical - stars: abundances - stars: evolution - stars: magnetic field - stars: massive - stars: oscillations

Simbad objects: 70

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Number of rows : 70
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 108 SB* 00 06 03.3890541936 +63 40 46.771220928 6.79 7.58 7.40     O4-8f?p 338 0
2 * gam Peg bC* 00 13 14.1523490172 +15 11 00.954346538 1.75 2.61 2.84 2.94 3.13 B2IV 720 0
3 * zet Cas bC? 00 36 58.2844874846 +53 53 48.877599163 2.58 3.47 3.66 3.74 3.95 B2IV 470 0
4 * del Cet bC* 02 39 28.9568473856 +00 19 42.631195332 2.97 3.85 4.07     B2IV 395 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
6 * tau08 Eri SB* 03 53 42.7023562560 -24 36 44.021417544   4.496 4.623     B6V 123 0
7 * nu. Eri bC* 04 36 19.1419185396 -03 21 08.857744927 2.82 3.737 3.928     B2III 407 0
8 V* HZ Aur a2* 05 06 08.3584818960 +33 55 07.279039380   7.03 7.07     B9p 194 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
10 V* V1156 Ori Ro* 05 23 50.3591328504 +02 04 55.824899052   7.78 7.91     B7IV 150 0
11 HD 35502 SB* 05 25 01.2041767248 -02 48 55.690705872 6.76 7.30 7.34 7.32 7.40 B5IVsnp 135 0
12 * del02 Ori SB* 05 32 00.4064140728 -00 17 04.347484800 5.97 6.67 6.83     B2Vsn 296 0
13 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
14 HD 37017 SB* 05 35 21.8667428568 -04 29 39.024375324 5.66 6.43 6.56 6.61 6.74 B2/3V 318 0
15 * sig Ori E Y*O 05 38 47.2050040320 -02 35 40.521424812 5.66 6.38 6.46 6.84 7.08 B2IV-Vp_He 486 0
16 * zet Ori A SB* 05 40 45.527143 -01 56 33.26036   1.79 1.90     O9.2IbvarNwk 680 0
17 V* V901 Ori Ro* 05 40 56.3704617744 -01 30 25.856677224 5.96 6.82 6.96     B2V 354 2
18 HD 43317 Pu* 06 15 47.0134228488 +04 17 01.095049500 5.82 6.456 6.614     B3IV 129 0
19 * 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
20 V* V727 Mon EB* 06 31 09.3417144960 +09 56 23.313181308   8.19 8.00     B3IV 42 0
21 * ksi01 CMa bC* 06 31 51.3662820799 -23 25 06.319934859 3.10 4.09 4.33 4.45 4.72 B0.7IV 336 0
22 HD 46149 Y*O 06 31 52.5319291296 +05 01 59.178678024 7.03 7.80 7.61 7.54 7.36 O8.5V 288 0
23 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
24 HD 46223 Y*O 06 32 09.3068103600 +04 49 24.705695568 6.73 7.50 7.28 6.95 6.79 O4V((f)) 406 0
25 HD 46202 bC* 06 32 10.4706981304 +04 57 59.764912343 7.60 8.332 8.269 7.98 7.86 O9.2V 300 0
26 HD 46769 * 06 35 15.8285310432 +00 53 24.785166300 5.43 5.84 5.86 5.78 5.81 B7Ib-II 94 0
27 HD 46966 ** 06 36 25.8880460976 +06 04 59.474397540 5.91 6.83 6.87     O8.5IV 218 0
28 * 16 Mon SB* 06 46 32.4145190352 +08 35 13.767386136   5.76 5.92     B3V 99 0
29 HD 50230 Pu* 06 52 19.8143879448 -00 40 38.959876308   8.93 8.95     B3III 54 0
30 * 15 CMa bC* 06 53 32.9069226414 -20 13 27.309395177 3.66 4.62 4.83 4.95 5.17 B1IV 214 0
31 HD 51756 ** 06 58 28.16142 -03 01 25.3628 6.15         O9.7IV 61 0
32 * 26 CMa Pu* 07 12 12.2147085456 -25 56 33.316082736 5.03 5.736 5.897     B2IV/V 93 0
33 HD 57682 * 07 22 02.0546074728 -08 58 45.766323408 5.20 6.24 6.43     O9.2IV 275 0
34 V* PT Pup bC* 07 36 41.0352383592 -19 42 08.425020168 4.65 5.524 5.699     B2III 155 0
35 * k02 Pup V* 07 38 49.8707332608 -26 48 13.849787556   4.26 4.429     B5IV 66 0
36 HD 64740 * 07 53 03.6344819483 -49 36 46.956285817 3.48 4.40 4.63 4.76 4.97 B2V 223 0
37 HD 66665 bC? 08 04 47.8516524576 +06 11 09.803109264 6.5 7.58 7.81     B1V 85 0
38 HD 67621 Y*O 08 06 41.6076511032 -48 29 50.600034816 5.31 6.143 6.317     B2IV 62 0
39 HD 74560 SB* 08 42 25.3866034128 -53 06 50.343377699 3.97 4.655 4.815     B3IV 182 0
40 * alf Pyx V* 08 43 35.5374303414 -33 11 10.979806079 2.65 3.50 3.68 3.76 3.93 B1.5III 224 0
41 HD 85953 Pu* 09 53 50.0989236576 -51 08 48.155931060 5.02 5.777 5.932     B2.5III 80 1
42 HD 96446 bC? 11 06 05.8219128840 -59 56 59.564064444 5.81 6.57 6.69     B2IIIp 177 0
43 HD 105382 Be* 12 08 05.2222663992 -50 39 40.575451536 3.65 4.32 4.47 4.53 4.70 B5V 186 0
44 * bet Cru bC* 12 47 43.26877 -59 41 19.5792 0.03 1.02 1.25 1.38 1.64 B1IV 360 1
45 * alf02 CVn a2* 12 56 01.6655889007 +38 19 06.155170512 2.44 2.76 2.88 2.98 3.05 A0VpSiEu 707 0
46 V* V869 Cen SB* 14 09 35.0324964096 -51 30 16.832689380   5.913 5.961     B8V 96 0
47 * a Cen Ro* 14 23 02.2387240143 -39 30 42.544559700 3.50 4.24 4.42 4.53 4.70 B2V 289 0
48 * sig Lup El* 14 32 37.0550628352 -50 27 25.733667127 3.39 4.240 4.423     B1/B2V 122 0
49 V* V836 Cen bC* 14 46 25.7601403800 -37 13 20.082887904 7.04 7.88 8.05     B2 124 0
50 * 25 Ser SB* 15 46 05.6365266672 -01 48 15.085342728 4.96 5.37 5.39     B8IV/V 121 0
51 HD 142184 Be* 15 53 55.8637866220 -23 58 41.143370530 4.77 5.352 5.402     B2V 261 1
52 V* V913 Sco Ro* 15 58 34.8665694960 -24 49 53.361727284 4.70 5.34 5.43     B5V 226 0
53 HD 148937 SB* 16 33 52.3869185520 -48 06 40.476418740 6.49 7.12 6.71 7.61   O6f?p 417 1
54 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0V 959 0
55 * tet Oph bC* 17 22 00.5793468 -24 59 58.366974 2.18 3.03 3.26 3.38 3.58 OB 350 0
56 V* V2052 Oph bC* 17 56 18.4001168880 +00 40 13.273317228 5.28 5.874 5.820     B3III 222 0
57 V* V686 CrA a2* 18 56 40.4859327624 -37 20 35.701261512 4.53 5.24 5.38     B3V 214 0
58 HD 176582 Er* 18 59 12.2918170752 +39 13 02.360908524 5.52 6.248 6.403     B5V 103 0
59 HD 180642 bC* 19 17 14.8038514896 +01 03 33.904495728 7.83 8.47 8.29     B1.5II-III 107 0
60 HD 181558 Pu* 19 21 37.1135468520 -19 14 04.045448508 5.65 6.16 6.26     B5III 70 0
61 HD 182180 * 19 24 30.1801035096 -27 51 57.389455476 5.22 5.889 6.011     B2Vnn 128 0
62 V* V1671 Cyg Ro* 19 35 32.0102348112 +31 16 35.933414736 6.44 7.29 7.44     B2V 136 0
63 V* V380 Cyg SB* 19 50 37.3267754400 +40 35 59.135141652 4.86 5.613 5.680     B1.1III+B2.5/3V: 305 0
64 V* V2100 Cyg a2* 19 59 15.3468080976 +52 03 20.488833576 5.29 5.954 6.125     B5III 66 0
65 HD 191612 SB* 20 09 28.6105997664 +35 44 01.286453904 7.40 8.07 7.80     O8fpe 250 0
66 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 756 0
67 * 16 Peg Be* 21 53 03.7686220732 +25 55 30.489021805 4.24 4.921 5.081     B6IIIe 175 0
68 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 790 0
69 * 12 Lac bC* 22 41 28.6495065456 +40 13 31.609736580 4.24 5.080 5.229     B1.5III 369 0
70 * 16 Lac bC* 22 56 23.6299283136 +41 36 13.948480440 4.61 5.436 5.587     B2IVs 325 0

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