2014A&A...565A..39M


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST14:12:49

2014A&A...565A..39M - Astronomy and Astrophysics, volume 565A, 39-39 (2014/5-1)

Evolution of surface CNO abundances in massive stars.

MAEDER A., PRZYBILLA N., NIEVA M.-F., GEORGY C., MEYNET G., EKSTROEM S. and EGGENBERGER P.

Abstract (from CDS):

The nitrogen-to-carbon (N/C) and nitrogen-to-oxygen (N/O) ratios are the most sensitive quantities to mixing in stellar interiors of intermediate and massive stars. We further investigate the theoretical properties of these ratios as well as put in context recent observational results obtained by the VLT-FLAMES Survey of massive stars in the Galaxy and the Magellanic Clouds. We consider analytical relations and numerical models of stellar evolution as well as our own stellar atmosphere models, and we critically re-investigate observed spectra. On the theoretical side, the N/C vs. N/O plot shows little dependence on the initial stellar masses, rotation velocities, and nature of the mixing processes up to relative enrichment of N/O by a factor of about four, thus this plot constitutes an ideal quality test for observational results. The comparison between the FLAMES Survey and theoretical values shows overall agreement, despite the observational scatter of the published results. The existence of some mixing of CNO products is clearly confirmed, however the accuracy of the data is not sufficient for allowing a test of the significant differences between different models of rotating stars and the Geneva models. We discuss reasons (for the most part due to observational bias) why part of the observational data points should not be considered for this comparison. When these observational data points are not considered, the scatter is reduced. Finally, the N/C vs. N/O plot potentially offers a powerful way for discriminating blue supergiants before the red supergiant stage from those after it. Also, red supergiants of similar low velocities may exhibit different N enrichments, depending on their initial rotation during the main-sequence phase.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: early-type - stars: evolution - stars: fundamental parameters - stars: massive - stars: rotation

Simbad objects: 42

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Number of rows : 42

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9082 1
2 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 359 0
3 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 441 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5369 1
5 SK -66 15 * 04 55 22.3467574781 -66 28 19.098729637 11.888 12.660 12.894   12.759 B0.5Ia 15 0
6 [ELS2006] N11 072 * 04 55 51.6265905319 -66 21 57.852345464 13.563 14.435 14.565   14.841 B0.2V 12 0
7 [ELS2006] N11 039 * 04 56 17.3176583040 -66 17 48.390587946 13.003 13.709 13.839   13.901 B2III 8 0
8 [L72] LH 9-45 * 04 56 42.6734654012 -66 29 45.667305627 12.819 13.546 13.657   13.715 B0.5III 10 0
9 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 227 0
10 [ELS2006] N11 095 * 04 57 37.9114087699 -66 24 59.838769744   14.71 14.89     B1Vn 9 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14316 1
12 Cl* NGC 2004 ELS 90 * 05 29 22.3063614880 -67 16 40.053944605 14.112 15.003 15.193   15.509 O9.5III 7 0
13 Cl* NGC 2004 ELS 100 * 05 29 29.8999514412 -67 18 21.984332793   15.11 15.29     B1Vn 7 0
14 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 257 0
15 Cl* NGC 2004 ELS 53 * 05 30 43.7987567323 -67 15 22.544805911 13.837 14.797 14.906   15.117 B0.2Ve 8 0
16 Cl* NGC 2004 ELS 29 * 05 31 00.1205023851 -67 14 59.110037224 13.423 14.198 14.391   14.486 B1.5e 7 0
17 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1026 2
18 CD-57 3348 * 10 35 46.5646473211 -58 14 12.038766410 6.93 7.70 7.75 7.49 7.38 B1II 43 0
19 CPD-57 3509 * 10 35 48.9970512149 -58 14 54.300958077 10.16 10.82 10.70 10.59 10.49 B2III 30 0
20 NGC 3293 OpC 10 35 49 -58 13.8   4.84 4.7     ~ 277 0
21 CPD-57 3526 * 10 35 58.8762366428 -58 14 26.362285438 7.47 8.27 8.20 9.03 7.98 B1III 23 0
22 HD 92044 * 10 36 16.0791681031 -58 16 38.158187219 7.72 8.40 8.25 8.10 7.91 B1II 57 0
23 V* BU Cru EB* 12 53 37.6191876667 -60 21 25.424160921 6.49 7.04 6.84 7.55   B2Ib 97 0
24 NGC 4755 OpC 12 53 39 -60 21.7           ~ 264 0
25 * kap Cru SB* 12 53 48.9195114429 -60 22 34.468234629 5.62 6.12 5.94 7.12   B2/3Ia 118 0
26 HD 111990 * 12 53 59.7990827718 -60 20 07.505578149 6.46 6.95 6.77 7.68   B1/2Ib 74 1
27 BD-13 4921 * 18 18 29.9553395208 -13 49 57.614738405 9.81 10.41 9.91     B0.5V 44 0
28 NGC 6611 210 * 18 18 36.9748062496 -13 47 52.765515669 11.23 12.03 11.47     B1V 23 0
29 NGC 6611 223 * 18 18 37.8649107820 -13 46 35.152244595 11.44 11.80 11.06     B1V 28 0
30 TYC 5689-209-1 Em* 18 18 38.4018455003 -13 47 09.064567030 13.18 13.487 12.753   11.792 B1.5Ve 25 0
31 LS IV -13 17 * 18 18 39.9943894387 -13 54 33.512340063 11.42 11.978 11.474   10.870 B1V 19 0
32 LS IV -13 19 * 18 18 40.7577738585 -13 46 52.033750439 10.84 11.27 11.00     B1V 36 0
33 NGC 6611 259 * 18 18 40.9652227360 -13 45 29.645772336 12.01 11.85 11.05     B0.5V 23 0
34 NGC 6611 289 * 18 18 44.0879892241 -13 48 56.501257647 12.89 13.11 12.57     B3V 18 0
35 Cl* NGC 6611 PPM 16 * 18 18 44.660 -13 47 56.37 12.589 12.350 11.718   10.947 B1.5V 23 0
36 NGC 6611 301 * 18 18 44.9817098254 -13 46 24.897570778 12.5 12.76 12.16     B2V 22 0
37 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 918 2
38 BD-13 4930 * 18 18 52.6748769663 -13 49 42.635131189 9.04 9.71 9.45   8.968 O9.7IIIp 87 0
39 V* QR Ser bL* 18 18 58.6905343193 -13 59 28.459499667 7.92 8.55 8.28 9.07   O9.5III+B3-5V/III 74 0
40 [BNM2013] 21.04 69 * 18 19 00.4285402787 -13 42 41.015173532 14.057 13.635 12.594   11.289 B1.5V 20 0
41 BD-13 4933 Be* 18 19 04.8785156526 -13 48 20.447211729 11.259 11.095 10.628   9.915 B0.5Vn 39 0
42 LS IV -13 30 * 18 19 18.4807638608 -13 55 40.089502487 11.32 11.78 11.42     B1.5V 21 0

    Equat.    Gal    SGal    Ecl

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2019.10.14-14:12:49

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