2011A&A...536A..65D


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.18CET04:51:42

2011A&A...536A..65D - Astronomy and Astrophysics, volume 536A, 65-65 (2011/12-1)

The VLT-FLAMES survey of massive stars: Nitrogen abundances for Be-type stars in the Magellanic Clouds.

DUNSTALL P.R., BROTT I., DUFTON P.L., LENNON D.J., EVANS C.J., SMARTT S.J. and HUNTER I.

Abstract (from CDS):

We compare the predictions of evolutionary models for early-type stars with atmospheric parameters, projected rotational velocities and nitrogen abundances estimated for a sample of Be-type stars. Our targets are located in 4 fields centred on the Large Magellanic Cloud cluster: NGC2004 and the N11 region as well as the Small Magellanic Cloud clusters: NGC330 and NGC346. Atmospheric parameters and photospheric abundances have been determined using the non-LTE atmosphere code tlusty. Effective temperature estimates were deduced using three different methodologies depending on the spectral features observed; in general they were found to yield consistent estimates. Gravities were deduced from Balmer line profiles and microturbulences from the SiIII spectrum. Additionally the contributions of continuum emission from circumstellar discs were estimated. Given its importance in constraining stellar evolutionary models, nitrogen abundances (or upper limits) were deduced for all the stars analysed. Our nitrogen abundances are inconsistent with those predicted for targets spending most of their main sequence life rotating near to the critical velocity. This is consistent with the results we obtain from modelling the inferred rotational velocity distribution of our sample and of other investigators. We consider a number of possibilities to explain the nitrogen abundances and rotational velocities of our Be-type sample.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: early-type - stars: atmospheres - stars: emission-line, Be - stars: rotation

Simbad objects: 74

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Number of rows : 74

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9225 1
2 [MA93] 782 Be* 00 54 39.1001746896 -72 27 16.778637962 15.39 16.23 16.30   16.27 B1-3(Be-Fe) 5 0
3 LIN 260 Be* 00 54 40.6833521981 -72 30 28.629159953 14.11 15.10 15.23   15.28 B1-2e 8 0
4 LIN 276 Be* 00 55 13.591 -72 29 14.05 14.37 15.39 15.37   15.21 B2III 9 0
5 [MA93] 851 Be* 00 55 28.20 -72 29 06.5 14.57 15.48 15.47   15.38 B2(Be-Fe) 5 0
6 [MA93] 860 Be* 00 55 35.4849263999 -72 32 00.568235166 14.95 15.92 15.94   15.94 B1.5(Be-Fe) 5 0
7 [MA93] 869 Be* 00 55 43.4749547277 -72 31 32.862652695 15.17 16.09 16.08   16.09 Be-Fe 5 0
8 Cl* NGC 330 ELS 64 Be* 00 55 46.12 -72 33 13.1   15.87 15.96     B3:e 5 0
9 [MA93] 886 Be* 00 55 56.31 -72 23 33.5 15.71 16.46 16.49   16.43 B2III 9 0
10 [MA93] 890 Be* 00 55 59.4250012374 -72 30 34.523221173   15.8 15.86     B2.5(Be-Fe) 5 0
11 2dFS 5088 Be* 00 56 13.8404510081 -72 30 00.915468195 13.49 14.53 14.52   14.38 B0.5V(Be-Fe) 12 0
12 Cl* NGC 330 ARP 6 Be* 00 56 14.25 -72 28 30.0 14.94 15.81 15.90   15.82 B3III 17 0
13 Cl* NGC 330 BAL 575 Be* 00 56 18.0551856471 -72 26 35.905884039 15.01 15.66 15.75   15.89 B3e 5 0
14 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 361 0
15 OGLE J005626.60-722622.9 Be* 00 56 26.6171767345 -72 26 23.185924325 15.16 15.94 15.98   16.20 B3III 8 0
16 Cl* NGC 330 ROB B9 Be* 00 56 33.1242973570 -72 27 05.123296593 15.22 15.97 16.05   16.07 B3III 13 0
17 Cl* NGC 330 ELS 69 * 00 56 48.6408016455 -72 29 40.305636819 15.06 15.90 15.99   16.12 B3III 7 0
18 Cl* NGC 330 ELS 100 Be* 00 56 54.2602695811 -72 30 12.431156597 15.21 16.33 16.25   16.26 Be(B0-3) 4 0
19 LIN 315 Be* 00 56 56.4724704332 -72 20 07.650454778 14.61 15.38 15.43   15.49 B3e 6 0
20 [MA93] 973 Be* 00 57 00.1807581401 -72 30 09.983718588 13.74 14.79 14.88   14.96 B0.2V(Be-Fe) 12 0
21 SXP 5.05 HXB 00 57 02.1882483772 -72 25 55.430080346 14.77 15.76 15.96   15.75 B0.5e 29 0
22 Cl* NGC 330 ELS 83 * 00 57 04.64 -72 22 54.0 15.16 16.04 16.02   16.25 B3III 7 0
23 OGLE J005705.71-723341.8 Be* 00 57 05.78 -72 33 41.3   18.76 15.50   16.264 B0e 5 0
24 [MA93] 981 Be* 00 57 07.3041496271 -72 13 19.428334299 14.66 15.64 15.72   15.66 B1-2(Be-Fe) 6 0
25 2dFS 1224 HXB 00 57 23.9552544411 -72 23 56.636041352 13.60 14.64 14.71   14.92 B1.5e 12 1
26 [MA93] 1009 Be* 00 57 28.8762180900 -72 06 19.316450377 14.84 15.97 15.97   15.82 B1-2(Be-Fe) 5 0
27 AzV 191 Be* 00 57 37.2216152862 -72 13 09.259408831 12.36 13.41 13.52   13.68 Be(B1:) 16 0
28 [MA93] 1027 Be* 00 57 40.3340295658 -72 15 51.609855755 15.02 15.92 15.95   15.92 B1-2(Be-Fe) 6 0
29 [MA93] 1030 Be* 00 57 44.3084177766 -72 16 10.916793362 14.55 15.41 15.58   15.76 B2(Be-Fe) 7 0
30 [MA93] 1038 HXB 00 57 50.3832156922 -72 07 56.133951497 14.63 15.64 15.69   15.47 B1-2(Be-Fe) 39 0
31 [MA93] 1043 Be* 00 57 55.4650776225 -72 09 05.938907863 14.60 15.54 15.65   15.66 B1-2(Be-Fe) 8 0
32 LIN 328 Em* 00 57 57.84 -72 07 55.6 14.45 15.43 15.71   15.49 B1-5(II)e 9 0
33 Cl* NGC 346 KWBBE 313 * 00 58 11.4678610763 -72 14 42.876833279 15.03 16.01 16.07   16.08 B1-2(Be-Fe) 7 0
34 [MA93] 1067 Em* 00 58 22.618 -72 11 18.05 14.82 15.68 15.77   15.56 B1-2(Be-Fe) 8 0
35 [MA93] 1070 Em* 00 58 24.1736448779 -72 12 46.929323618 13.57 15.06 14.86   14.69 B0.5Vne 8 0
36 [MA93] 1075 Em* 00 58 29.6344973483 -72 18 40.857517053 14.74 15.74 15.73   16.00 B1e 6 0
37 LIN 342 Em* 00 58 41.8179478458 -72 11 17.784759646 13.71 14.89 14.95   14.80 B0.2:(Be-Fe) 14 0
38 [MA93] 1101 Be* 00 58 47.4717043120 -72 12 36.733004374 14.69 15.24 15.57   15.53 Be(B3_sh) 12 0
39 Cl* NGC 346 MPG 228 Em* 00 58 47.53 -72 09 02.7 14.77 15.58 15.60   15.69 B3(Be-Fe) 10 0
40 Cl* NGC 346 ELS 68 Em* 00 59 04.1734389694 -72 04 48.793848405 14.60 15.74 15.88   15.95 B0V(Be-Fe) 6 0
41 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 443 0
42 [MA93] 1118 Em* 00 59 06.39 -72 07 45.2 13.93 14.90 15.04   15.06 B2:(Be-Fe)_sh 9 0
43 [MA93] 1123 Em* 00 59 10.8643009015 -72 18 28.373883302 14.74 15.79 15.72   15.73 B1-2(Be-Fe) 5 0
44 Cl* NGC 346 MPG 596 Em* 00 59 12.1299449692 -72 12 11.744713324 15.09 16.05 15.94   15.66 B2(Be-Fe) 11 0
45 AzV 224 Be* 00 59 16.0386772072 -72 04 44.509558534 13.03 14.04 14.21   14.36 B1e 10 0
46 [MA93] 1144 Em* 00 59 23.3567238782 -72 12 00.622430935 14.16 15.18 15.44   15.57 B0.5V(Be-Fe) 7 0
47 [MA93] 1167 Em* 00 59 51.3384792504 -72 11 28.591354410 12.53 14.13 13.90   13.78 B0e 7 0
48 [MA93] 1183 Em* 01 00 05.2435482421 -72 15 55.735049563 14.78 15.68 15.85   15.87 B1-2(Be-Fe) 5 0
49 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5494 1
50 LHA 120-S 4 Em* 04 55 17.8791567880 -66 31 49.819464877 13.396 14.78 14.69 14.75 14.286 B0:n(Be-Fe) 9 0
51 [ELS2006] N11 078 * 04 56 04.9410602415 -66 31 25.088248089 13.903 14.532 14.667   14.910 B2(Be-Fe) 5 0
52 [L72] LH 9-81 * 04 56 19.4653174851 -66 27 37.980739669 13.826 14.637 14.648   14.276 B0.5(Be-Fe) 6 0
53 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 231 0
54 [ELS2006] N11 073 * 04 57 11.2606849695 -66 26 53.845450644 13.769 14.560 14.653   14.471 B0.5(Be-Fe) 5 0
55 [ELS2006] N11 090 * 04 57 32.5147898465 -66 25 56.931167327 14.325 15.047 15.129   14.976 B2e 5 0
56 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14539 1
57 Cl* NGC 2004 ELS 27 * 05 29 34.5466247473 -67 11 56.171421585 13.095 14.054 14.014   13.953 B0e 4 0
58 LHA 120-S 40 Em* 05 30 00.7353304284 -67 21 56.659667699 13.255 14.10 14.27 14.38 14.362 B2(Be-Fe) 9 0
59 Cl* NGC 2004 ELS 58 * 05 30 05.248 -67 18 46.13 13.821 14.746 14.828   14.709 O9.5V(Nstr) 5 0
60 Cl* NGC 2004 ELS 92 * 05 30 24.97 -67 12 46.5 14.475 15.201 15.244   15.603 B2e 4 0
61 Cl* NGC 2004 ELS 39 * 05 30 27.2396708364 -67 13 27.460128357 13.841 14.499 14.625   14.792 B1.5e 4 0
62 Cl* NGC 2004 SAAO 215 * 05 30 28.4424272710 -67 17 00.440216807   15 15.11     B1.5:e 6 0
63 Cl* NGC 2004 ELS 96 * 05 30 29.9673362334 -67 15 53.423465592 14.741 15.214 15.385   15.436 B1.5e 4 0
64 Cl* NGC 2004 MHFBE 101350 * 05 30 34.6547734263 -67 14 45.545693929 14.314 15.164 15.304   15.534 B1.5e 7 0
65 Cl* NGC 2004 ELS 56 * 05 30 35.95 -67 11 08.4 14.217 14.889 15.003   15.260 B1.5e 4 0
66 Cl* NGC 2004 ELS 35 * 05 30 37.185 -67 15 44.28 13.745 14.556 14.699   14.836 B1:(Be-Fe) 4 0
67 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 257 0
68 [BE74] 81 Em* 05 30 48.3771339512 -67 21 58.974420689 14.588 15.148 15.265   15.356 B2.5 7 0
69 [BE74] 82 Em* 05 30 58.0141989527 -67 18 14.721069366 13.303 13.906 14.181   13.898 B2(Be-Fe) 10 0
70 Cl* NGC 2004 ELS 115 * 05 31 04.6397119747 -67 18 34.964301369 14.729 15.375 15.527   15.749 B2e 4 0
71 Cl* NGC 2004 ELS 48 * 05 31 47.0347555374 -67 17 54.420285971 14.019 14.637 14.681   14.958 B2.5e 4 0
72 NGC 3293 OpC 10 35 49 -58 13.8   4.84 4.7     ~ 280 0
73 NGC 4755 OpC 12 53 39 -60 21.7           ~ 266 0
74 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 926 2

    Equat.    Gal    SGal    Ecl

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2020.02.18-04:51:42

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