2013MNRAS.433.1436M

Query : 2013MNRAS.433.1436M

2013MNRAS.433.1436M - Mon. Not. R. Astron. Soc., 433, 1436-1443 (2013/August-1)

Barium and yttrium abundance in intermediate-age and old open clusters.

MISHENINA T., KOROTIN S., CARRARO G., KOVTYUKH V.V. and YEGOROVA I.A.

Abstract (from CDS):

Barium is a neutron-capture element that, in open clusters, is frequently overabundant with respect to iron. A clear explanation for this is still missing. Additionally, its gradient across the Galactic disc is poorly constrained. We measure the abundance of yttrium and barium using the synthetic spectrum method from UVES high-resolution spectra of eight distant open clusters, namely Ruprecht 4, Ruprecht 7, Berkeley 25, Berkeley 73, Berkeley 75, NGC 6192, NGC 6404 and NGC 6583. The barium abundance was estimated using non-local thermodynamic equilibrium approximation. We confirm that barium is indeed overabundant in most clusters, especially young clusters. Finally, we investigated the trend of yttrium and barium abundances as a function of distance in the Galaxy and ages. Several scenarios for the barium overabundance are then discussed.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: abundances - stars: late-type - Galaxy: disc - Galaxy: evolution

Simbad objects: 44

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Number of rows : 44
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 Cl* Berkeley 73 CGM 12 * 06 21 54.9151280688 -06 17 51.801339372   16.30 15.30   13.93 ~ 7 0
2 Cl* Berkeley 73 CGM 13 * 06 21 55.3913007864 -06 20 09.831177348   16.10 15.36   14.30 ~ 6 0
3 Cl* Berkeley 73 CGM 19 * 06 21 57.2596894968 -06 17 15.267478884   16.74 16.03   14.95 ~ 9 0
4 Cl* Berkeley 73 CGM 16 * 06 22 01.1475681027 -06 19 16.725119494   16.86 15.84   14.48 ~ 12 0
5 Cl* Berkeley 73 CGM 18 * 06 22 02.0058961272 -06 19 21.456540084   17.10 15.99   14.58 ~ 13 0
6 Cl Berkeley 73 OpC 06 22 04.7 -06 19 13           ~ 66 0
7 Cl* Berkeley 73 CGM 15 * 06 22 10.4376413448 -06 19 29.464716720   16.51 15.57   14.30 ~ 16 0
8 Cl* Berkeley 25 CGM 13 * 06 41 13.6752707184 -16 29 16.480856868   17.36 16.33   14.97 ~ 9 0
9 Cl Berkeley 25 OpC 06 41 16.1 -16 28 58           ~ 67 0
10 Cl* Berkeley 25 CGM 12 * 06 41 16.6469038896 -16 28 15.400731576   17.59 16.32   14.78 ~ 8 0
11 Cl* Berkeley 25 CGM 10 * 06 41 20.4491348664 -16 28 22.797329196   17.45 16.13   14.56 ~ 9 0
12 Cl* Ruprecht 4 CGB 3 * 06 48 51.6912002616 -10 30 20.535820956   15.46 14.24   12.69 ~ 8 0
13 Cl* Ruprecht 4 CGB 18 * 06 48 54.5815152456 -10 33 20.286099540   16.62 15.44   13.90 ~ 4 0
14 Cl* Ruprecht 4 CGB 8 * 06 48 55.4431074768 -10 31 31.458356148   15.94 14.77   13.26 ~ 8 0
15 Cl* Berkeley 75 CGM 22 * 06 48 55.8637285351 -24 00 07.433823043   17.08 16.13   14.99 ~ 5 0
16 Cl Ruprecht 4 OpC 06 48 57.7 -10 31 24           ~ 51 0
17 Cl* Ruprecht 4 CGB 29 * 06 48 57.86999999952 -10 30 26.9999999993   17.29 15.95   14.25 ~ 5 0
18 Cl Berkeley 75 OpC 06 49 00.0 -23 59 51           ~ 71 0
19 Cl* Ruprecht 4 CGB 4 * 06 49 00.8638424380 -10 31 56.228833730   15.60 14.30   12.68 ~ 6 0
20 Cl* Berkeley 75 CGM 9 * 06 49 07.1018304024 -23 59 44.989091340   15.78 14.89   13.71 ~ 11 0
21 Cl Berkeley 29 OpC 06 53 03.6 +16 55 24   14.3       ~ 187 0
22 2MASS J06574308-1312176 RG* 06 57 43.0853313192 -13 12 17.658426132   16.02 14.58   12.71 ~ 21 0
23 Cl Berkeley 33 OpC 06 57 49.7 -13 13 38           ~ 95 0
24 Cl* Ruprecht 7 CGB 2 * 06 57 50.1563952432 -13 13 40.226805264   15.47 14.07   12.71 ~ 14 0
25 Cl* Ruprecht 7 CGB 7 * 06 57 52.8617595672 -13 12 54.961425288   16.41 15.07   12.25 ~ 12 0
26 Cl* Ruprecht 7 CGB 6 * 06 57 53.6350993464 -13 12 57.845949192   16.24 14.79   12.91 ~ 12 0
27 2MASS J06575454-1313587 RG* 06 57 54.5501354544 -13 13 58.734160608   16.17 14.78   12.95 ~ 20 0
28 NGC 2324 OpC 07 04 08.5 +01 02 50   8.83 8.4     ~ 174 0
29 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
30 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
31 Cl* NGC 6192 MMU 137 ** 16 40 11.4165638760 -43 24 00.783486792   12.981 11.223   9.465 G9III 18 0
32 Cl* NGC 6192 MMU 96 SB* 16 40 16.4599958160 -43 22 37.610042628   12.808 11.306   9.804 G2III 19 0
33 NGC 6192 OpC 16 40 18.7 -43 21 16           ~ 99 0
34 CD-43 10987 * 16 40 24.2111991864 -43 20 07.892426724   13.288 11.743   10.197 ~ 19 0
35 CD-43 10991 * 16 40 40.8092588616 -43 22 59.428693452   12.93 11.40   9.92 ~ 18 0
36 [CMC2005] NGC 6404 5 * 17 39 30.8662429776 -33 14 52.109191104     12.350   9.971 ~ 15 0
37 [CMC2005] NGC 6404 40 * 17 39 37.2347791536 -33 14 10.004270640     14.090   11.672 ~ 8 0
38 NGC 6404 OpC 17 39 38.9 -33 13 24     10.6     ~ 55 0
39 [CMC2005] NGC 6404 27 * 17 39 43.4544917688 -33 15 13.830656328     13.670   11.237 ~ 12 0
40 [CMC2005] NGC 6404 16 * 17 39 43.5374889720 -33 14 06.532631268     13.420   10.975 ~ 12 0
41 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
42 NGC 6583 OpC 18 15 51.0 -22 08 38     10.0     ~ 83 0
43 [CMC2005] NGC 6583 46 * 18 15 51.1272677520 -22 07 26.315629536     14.100   12.517 ~ 14 0
44 [CMC2005] NGC 6583 62 * 18 15 51.2334854736 -22 08 28.035455064     14.270   12.618 ~ 13 0

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