1997A&A...323..461H

Query : 1997A&A...323..461H

1997A&A...323..461H - Astronomy and Astrophysics, volume 323461-468 (1997/7-2)

Carbon, nitrogen, oxygen and lithium abundances of six cool supergiants in the SMC.

HILL V., BARBUY B. and SPITE M.

Abstract (from CDS):

Carbon, nitrogen and oxygen abundances were derived from high-resolution spectra of 6 cool supergiants of the Small Magellanic Cloud. Oxygen-to-iron ratios (mean value <[O/Fe]≥~-0.18dex) are found to be similar to those found in young objects in the LMC and the Galaxy. This result is discussed in terms of chemical evolution. A mean deficiency of the carbon-to-iron ratio of <[C/Fe]≥~-0.3dex and a nitrogen-to-iron ratio <[N/Fe]≥~+0.22dex might imply a mixing signature, which is confirmed by the low 12C/13C ratio measured in three stars. In terms of chemical evolution, carbon plus nitrogen abundances have to be considered: in our sample, a mean value of <[(C+N)/Fe]≥~-0.15dex indicates a slight deficiency in carbon plus nitrogen with respect to the Sun, similar to the deficiencies found in Galactic supergiants and Orion. Lithium has been detected in all the program stars, reaching ε(Li)=0.6dex for two stars.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - supergiants - galaxies: abundances - evolution - Magellanic Clouds

VizieR on-line data: <Available at CDS (J/A+A/323/461): table5 tablea1 tablea2 tablea3 tablea4 tablea5 tables.tex>

Simbad objects: 37

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Number of rows : 37
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 PMMR 23 s*r 00 48 46.3685533128 -73 28 20.780432292 15.50 14.13 12.37 11.49   K5-M0Iab 47 0
2 PMMR 27 s*r 00 49 08.2036330296 -73 14 15.627192828   15.17 13.40 12.40   K1Ia-Iab 29 0
3 PMMR 48 s*r 00 51 50.4914456640 -72 11 32.671776336 16.23 14.54 12.75   9.53 K2Ia-Iab 32 0
4 Dachs SMC 1-11 s*y 00 52 22.6008002304 -72 39 51.127832448 12.61 12.04 11.31     F5Ia 37 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
6 SK 55 s*y 00 53 01.9327476144 -71 38 37.525148412   12.38 11.91     F3Iab 50 0
7 Cl* NGC 330 ARP 41 s*y 00 56 14.5589672736 -72 27 42.429585492   14.514 12.96     G6Ib 34 0
8 AzV 198 * 00 58 01.7285604984 -72 19 35.462947116   13.76 13.32     F5 26 0
9 AzV 197 s*y 00 58 02.2767689232 -72 17 56.544458352   12.31 11.86     F2Ia 35 0
10 PMMR 102 s*y 00 59 40.5478294824 -72 20 55.906736604 15.98 14.48 12.76 11.97 9.49 G7.5Ia-Iab 29 0
11 AzV 304 * 01 02 21.4823289456 -72 39 14.587308576   14.66 14.77     B0.5V 57 0
12 PMMR 145 Ev* 01 03 15.4384420392 -72 40 12.231925932 15.26 14.53 13.04   9.96 K5-8 26 0
13 RMC 29 s*r 01 03 18.5647936704 -72 06 46.099724688   13.648 12.53 11.78 11.22 K0Ia-Iab 42 0
14 SK 118 s*y 01 04 55.0862048184 -72 02 36.431493072 12.15 11.67 11.09     F4Ia 51 0
15 IDK D002 * 02 06 59.0617913832 -74 16 55.984806840   14.32 14.38 14.33   B2 7 0
16 SOI 113 * 04 56 54.7064876472 -67 05 09.554663580   13.137 12.691     F3Iab 21 0
17 SOI 525 * 04 58 52.1144263296 -69 25 32.449635804   13.07 12.77     A4Ib 20 0
18 HD 271018 * 05 07 14.1801234816 -66 03 18.431916876 12.42 12.01 11.43 10.88 11.017 ~ 56 0
19 SOI 368 * 05 11 16.5616506360 -68 23 33.450713484   12.877 12.649     F3Ib 28 0
20 HD 269187 sg* 05 14 04.4261470920 -67 15 50.537714040 11.99 11.74 11.49     A9Ia 31 0
21 HD 269355 s*y 05 18 38.6601367248 -69 45 46.699302960 12.08 11.69 11.24     F6Ia 44 0
22 HD 271182 s*y 05 21 01.7107333512 -65 48 02.420745444   10.36 9.620     F8_0 110 0
23 SOI 49 * 05 22 18.4438372416 -66 54 59.071339548   12.75 12.26     F8Ib 35 0
24 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
25 NGC 1948 As* 05 24 20.00 -66 24 12.0   10.81 10.61     ~ 110 0
26 Cl* NGC 1948 WBT 542 Ev* 05 26 37.4003255472 -66 14 50.644208796   16.045 14.414     ~ 15 0
27 W61 15-4 s*y 05 28 21.9667721256 -68 59 48.271678800   11.84 11.45     F5Ia 47 0
28 TYC 8891-1219-1 * 05 28 54.6298838472 -66 01 28.376405868   12.72 12.51     F0II: 21 0
29 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
30 SK -66 161 * 05 35 31.1138628936 -66 45 24.152233104 12.59 12.23 11.90     F5I: 28 0
31 HD 269868 * 05 36 34.4420993976 -67 40 31.339433820   12.82 12.36 12.06   F8I: 36 0
32 HD 269953 s*y 05 40 12.1666201344 -69 40 04.853223012   10.83 9.95     G0_0 94 0
33 HD 270025 * 05 42 09.3328152432 -68 27 31.157860572   12.43 11.89 11.58   F8I: 45 0
34 HD 270100 cC* 05 44 50.5761302832 -67 29 40.518425148   12.30 12.21 9.47   G2:Ia 46 0
35 * alf Car * 06 23 57.10988 -52 41 44.3810 -0.49 -0.59 -0.74 -0.96 -1.13 A9II 461 1
36 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
37 Cl* NGC 1818 ROB B12 * ~ ~   15.29 13.68     ~ 10 0

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