1994A&A...290..753M

Query : 1994A&A...290..753M

1994A&A...290..753M - Astronomy and Astrophysics, volume 290753-761 (1994/10-3)

Carbon abundances in the LMC globular cluster NGC 1818.

MELIANI M.T., BARBUY B. and RICHTLER T.

Abstract (from CDS):

From medium-resolution spectra (∼5A) of 5 red supergiants in the globular cluster NGC 1818 of the Large Magellanic Cloud, we have derived their metallicities through a comparison to a grid of 380 synthetic spectra (Cayrel et al. 1991). The carbon abundances were then derived by computing synthetic spectra in the G-band region. A mean metallicity for the 5 stars is [Fe/H]≃-0.9. The mean carbon abundance is ε(C)=7.9 for 4 stars, and a lower value of ε(C)=7.2 for the star B26, for which a convective mixing, or exchange of material with a companion has possibly occurred.

Abstract Copyright: ∼

Journal keyword(s): Magellanic Clouds - galaxies: abundances - galaxies: star clusters - globular clusters: NGC 1818 (LMC)

CDS comments: NGC 1948 F6:4 = Cl* NGC 1948 WBT 542

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 SOI 465 sg* 04 49 14.0290853232 -68 58 11.582188428   12.61 12.03 11.70   A7Iab 22 0
2 SV* HV 5497 cC* 04 55 40.5527820192 -66 25 43.318661664     11.930 11.38 10.88 G2Ib 89 0
3 SOI 113 * 04 56 54.7064876472 -67 05 09.554663580   13.137 12.691     F3Iab 21 0
4 SOI 525 * 04 58 52.1144263296 -69 25 32.449635804   13.07 12.77     A4Ib 20 0
5 NGC 1818 GlC 05 04 13.300 -66 26 05.47           ~ 279 0
6 SV* HV 2294 cC* 05 06 14.8080123792 -66 40 45.907786884   12.66 12.15 12.44 11.830 F7I 91 0
7 HD 271018 * 05 07 14.1801234816 -66 03 18.431916876 12.42 12.01 11.43 10.88 11.017 ~ 56 0
8 SOI 368 * 05 11 16.5616506360 -68 23 33.450713484   12.877 12.649     F3Ib 28 0
9 HD 271182 s*y 05 21 01.7107333512 -65 48 02.420745444   10.36 9.620     F8_0 110 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 NGC 1948 As* 05 24 20.00 -66 24 12.0   10.81 10.61     ~ 110 0
12 SV* HV 953 cC* 05 25 08.2680070968 -67 38 38.957619300   12.39 12.280   11.390 ~ 61 0
13 Cl* NGC 1948 WBT 542 Ev* 05 26 37.4003255472 -66 14 50.644208796   16.045 14.414     ~ 15 0
14 W61 15-4 s*y 05 28 21.9667721256 -68 59 48.271678800   11.84 11.45     F5Ia 47 0
15 SV* HV 1003 cC* 05 35 36.1551151488 -68 32 03.814599732     13.179   12.388 ~ 55 0
16 HD 269868 * 05 36 34.4420993976 -67 40 31.339433820   12.82 12.36 12.06   F8I: 36 0
17 HD 269953 s*y 05 40 12.1666201344 -69 40 04.853223012   10.83 9.95     G0_0 94 0
18 HD 270025 * 05 42 09.3328152432 -68 27 31.157860572   12.43 11.89 11.58   F8I: 45 0
19 HD 270100 cC* 05 44 50.5761302832 -67 29 40.518425148   12.30 12.21 9.47   G2:Ia 46 0
20 Cl* NGC 1818 ROB C12 * ~ ~   15.250 13.505     ~ 4 0
21 Cl* NGC 1818 ROB C7 * ~ ~   15.897 14.481     ~ 3 0
22 Cl* NGC 1818 ROB B26 * ~ ~   15.009 13.325     ~ 3 0
23 Cl* NGC 1818 ROB B12 * ~ ~   15.29 13.68     ~ 10 0
24 Cl* NGC 1818 ROB B1 * ~ ~   15.739 14.403     ~ 3 0
25 Cl* NGC 1818 ROB D12 * ~ ~   13.52 13.65     B 8 0

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