2011ApJ...736..120M

Query : 2011ApJ...736..120M

2011ApJ...736..120M - Astrophys. J., 736, 120 (2011/August-1)

s-processing in the galactic disk. I. Super-solar abundances of y, zr, la, and ce in young open clusters.

MAIORCA E., RANDICH S., BUSSO M., MAGRINI L. and PALMERINI S.

Abstract (from CDS):

In a recent study based on homogeneous barium abundance measurements in open clusters (OCs), a trend of increasing [Ba/Fe] ratios for decreasing cluster age was reported. We present here further abundance determinations, relative to four other elements having important s-process contributions, with the aim of investigating whether or not the growth found for [Ba/Fe] is indicative of a general property, shared also by the other heavy elements formed by slow neutron captures. In particular, we derived abundances for yttrium, zirconium, lanthanum, and cerium, using equivalent width measurements and the MOOG code. Our sample includes 19 OCs of different ages, for which the spectra were obtained by the ESO Very Large Telescope using the UVES spectrometer. The growth previously suggested for Ba is confirmed for all the elements analyzed in our study. This fact implies significant changes in our views of the Galactic chemical evolution for elements beyond iron. Our results necessarily require that very low mass asymptotic giant branch stars (M{lap}1.5 M☉) produce larger amounts of s-process elements (and hence activate the 13C-neutron source more effectively) than previously expected. Their role in producing neutron-rich elements in the Galactic disk has been so far underestimated, and their evolution and neutron-capture nucleosynthesis should now be reconsidered.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: evolution - nuclear reactions, nucleosynthesis, abundances - open clusters and associations: general - stars: abundances - stars: AGB and post-AGB

Simbad objects: 138

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Number of rows : 138
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 188 OpC 00 47 11.5 +85 14 38           ~ 922 0
2 NGC 1193 OpC 03 05 56.6 +44 22 59     12.6     ~ 88 0
3 HD 27732 SB* 04 23 22.3298880648 +21 22 44.752609020   9.628 8.846     ~ 148 0
4 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3074 0
5 HD 28545 SB* 04 30 34.8766762656 +15 44 02.372601156   9.720 8.84 9.03   K0 84 1
6 HD 284574 PM* 04 40 05.8433176920 +23 18 16.365681612   10.211 9.402     K0 97 0
7 HD 32347 PM* 05 03 07.6577118384 +13 43 50.412591984   9.372 8.596 8.182 7.810 K0 118 0
8 NGC 1817 OpC 05 12 33.4 +16 41 46           ~ 180 0
9 NGC 1883 OpC 05 25 55.2 +46 29 35     12.0     ~ 48 0
10 Cl Berkeley 20 OpC 05 32 36.5 +00 11 06           ~ 120 0
11 Cl* Berkeley 20 SBR 1201 * 05 32 36.7628350176 +00 11 04.840328760     16.177     ~ 14 0
12 Cl* Berkeley 20 SBR 1240 * 05 32 38.9519765184 +00 11 20.368920480     15.154     ~ 21 0
13 NGC 2112 OpC 05 53 48.5 +00 24 11     9.1     ~ 91 0
14 NGC 2141 OpC 06 02 56.2 +10 27 04           ~ 145 0
15 NGC 2158 OpC 06 07 26.9 +24 05 56           ~ 294 0
16 NGC 2209 GlC 06 08 36.06 -73 50 07.9   13.58 13.15     ~ 114 0
17 NGC 2243 OpC 06 29 34.8 -31 16 55   10.12 9.4     ~ 269 0
18 Cl Collinder 110 OpC 06 38 42.5 +02 04 08     10.5     ~ 71 1
19 Cl* Berkeley 29 BHT 602 * 06 52 55.4753759496 +16 57 39.620537568           K1 12 0
20 Cl Berkeley 29 OpC 06 53 04.2 +16 55 39   14.3       ~ 174 0
21 Cl* Berkeley 29 K 818 V* 06 53 04.3035859512 +16 55 39.674046936   17.581 16.609 16.22   ~ 15 0
22 Cl* Berkeley 29 BHT 933 * 06 53 04.4696388600 +16 57 45.008820072   17.435 16.447     ~ 11 0
23 Cl* Berkeley 29 K 801 * 06 53 08.0629268784 +16 55 40.580477220   17.542 16.579     G6III 17 0
24 Cl Berkeley 31 OpC 06 57 37.4 +08 17 06           ~ 128 0
25 Cl* Berkeley 32 DBT 99 HB* 06 57 50.5647416841 +06 26 11.936287231   14.769 13.696   12.477 ~ 22 0
26 Cl* Berkeley 32 DBT 121 * 06 57 59.8110311326 +06 26 59.894034677 16.261 15.387 14.242   13.028 ~ 17 0
27 Cl* Berkeley 32 KM 27 RG* 06 58 02.2532836368 +06 24 56.655180000 16.388 15.504 14.384   13.177 ~ 22 0
28 Cl* Berkeley 32 DBT 787 HB* 06 58 03.0802810656 +06 26 16.046291472 15.578 14.797 13.722   12.582 ~ 19 0
29 Cl Berkeley 32 OpC 06 58 07.2 +06 25 59           ~ 145 0
30 Cl* Berkeley 32 RS 1866 RG* 06 58 07.4644077336 +06 29 32.680290840 16.977 16.314 15.306   14.165 ~ 20 0
31 Cl* Berkeley 32 KM 17 HB* 06 58 08.2327053216 +06 24 19.416522240 15.542 14.756 13.685   12.540 ~ 23 0
32 Cl* Berkeley 32 SBR 938 * 06 58 11.4805266731 +06 21 16.177443258     13.672   12.501 ~ 13 0
33 Cl* Berkeley 32 KM 18 HB* 06 58 13.7544484904 +06 27 54.868937734 15.536 14.768 13.713   12.550 ~ 26 0
34 Cl* Berkeley 32 SBR 940 HB* 06 58 22.8994656440 +06 26 25.286745982   14.793 13.691   12.548 ~ 21 0
35 2MASS J07040114+0106040 RG* 07 04 01.1471609808 +01 06 04.008009456   14.347 13.351 12.97 12.216 ~ 25 0
36 2MASS J07040376+0100148 RG* 07 04 03.7646782104 +01 00 14.807992464   14.444 13.425 12.97 12.267 ~ 23 0
37 NGC 2324 OpC 07 04 07.9 +01 02 46   8.83 8.4     ~ 159 0
38 NGC 2324 91 SB* 07 04 08.2230058488 +01 05 18.442564368   14.312 13.291   12.144 ~ 16 0
39 NGC 2324 67 RG* 07 04 13.5452497896 +01 02 05.151154704   14.635 13.615   13.938 ~ 25 0
40 NGC 2324 134 * 07 04 14.7616693728 +01 01 06.704253768   14.374 13.332 12.90 12.201 ~ 14 0
41 NGC 2324 136 * 07 04 16.1655848640 +01 01 13.459124928   13.731 12.508   11.242 ~ 25 0
42 NGC 2360 OpC 07 17 46.3 -15 37 52           ~ 194 0
43 Cl* Melotte 66 SBR 1865 RB? 07 25 57.9397563960 -47 40 23.249030916     14.5     ~ 10 0
44 Cl Melotte 66 4118 RB? 07 26 02.5076412696 -47 40 55.930815012     14.6     ~ 13 0
45 Cl Melotte 66 4266 * 07 26 17.2969695792 -47 44 00.058996140     14.55     ~ 14 0
46 Cl Melotte 66 OpC 07 26 17.5 -47 41 06   8.73       ~ 196 0
47 Cl Melotte 66 2107 * 07 26 19.8971855928 -47 40 15.854429964   15.627 14.462 14.413 13.52 ~ 16 0
48 Cl Melotte 66 3235 * 07 26 34.5891912456 -47 42 47.162670264   15.780 14.626 14.428 13.39 ~ 16 0
49 NGC 2420 OpC 07 38 24.5 +21 34 30   9.0 8.3     ~ 476 0
50 Cl Berkeley 39 OpC 07 46 48.5 -04 39 54           ~ 190 1
51 NGC 2477 272 RB? 07 52 00.7883303232 -38 28 49.095660972   13.525 12.282   11.024 ~ 30 0
52 Cl* NGC 2477 KVI 3838 RB? 07 52 10.7489665752 -38 35 16.218892608   13.549 12.3     ~ 19 0
53 NGC 2477 OpC 07 52 11.0 -38 32 13   6.64 5.8     ~ 290 0
54 Cl* NGC 2477 KVI 2447 * 07 52 25.3176217488 -38 38 38.695720344   14.008 12.771 11.70 11.24 ~ 13 0
55 Cl* NGC 2477 KVI 1492 RB? 07 52 36.5274077976 -38 37 54.357311496   13.428 12.231   10.995 ~ 24 0
56 Cl* NGC 2477 KVI 1019 RB? 07 52 41.8305112560 -38 32 12.957018288   13.909 12.714     ~ 20 0
57 Cl* NGC 2477 MMU 3206 * 07 52 55.0334365632 -38 33 12.560856624   13.623 12.331     ~ 20 0
58 Cl* NGC 2516 JJT 7 * 07 57 20.7551436696 -60 46 44.408343072   15.087 14.184   13.177 ~ 20 0
59 Cl* NGC 2516 JJT 11 * 07 57 31.5394338168 -60 42 10.788334848   15.225 14.287   13.280 ~ 30 0
60 Cl* NGC 2516 DAC 213 SB* 07 57 55.4834821442 -60 43 20.654993016 15.29 14.92 14.04   12.994 ~ 17 0
61 NGC 2516 OpC 07 58 06.5 -60 48 00           ~ 713 0
62 Cl* NGC 2632 S 25 Ro* 08 37 46.6100294766 +19 26 18.046945074   11.243 10.635     F9V 63 0
63 K2-100 Ro* 08 38 24.3002838928 +20 06 21.828057218   11.085 10.521     G2 102 0
64 Cl* NGC 2632 S 83 Ro* 08 39 45.7489350539 +19 22 01.145101156   11.257 10.640     G1V 77 0
65 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1564 0
66 Cl* NGC 2632 S 138 Ro* 08 40 42.4813583883 +19 33 57.623817270   12.063 11.331     G4V 72 0
67 IC 2391 OpC 08 41 10.1 -52 59 28           ~ 822 0
68 Cl* NGC 2632 S 155 SB* 08 41 10.3080648125 +19 49 07.006491032   12.268 11.495     G6.6 64 0
69 BD+20 2181 Ro* 08 41 25.8429243867 +19 56 36.848107538   11.342 10.687     G0V 74 0
70 BD+20 2184 Ro* 08 41 43.8160475073 +20 13 36.752729096   10.988 10.431     G2 91 1
71 Cl* NGC 2660 SBT 296 RB? 08 42 36.4272537240 -47 12 07.495126164   15.798 14.552   13.174 ~ 15 0
72 Cl* NGC 2660 SBT 318 RB? 08 42 36.7085622912 -47 10 37.296498756   15.401 14.110   12.713 ~ 11 0
73 NGC 2660 OpC 08 42 40.1 -47 12 04   9.05 8.8     ~ 152 0
74 Cl* NGC 2660 SBT 542 RB? 08 42 41.7185926800 -47 11 25.454997060   15.420 14.120   12.704 ~ 15 0
75 Cl* NGC 2660 SBT 694 RB? 08 42 45.4330931736 -47 11 18.916370232   15.674 14.368   12.938 ~ 15 0
76 Cl* NGC 2660 SBT 862 RB? 08 42 50.6657557584 -47 13 03.817737264   15.602 14.315   12.909 ~ 15 0
77 Cl* NGC 2682 ES I-46 * 08 50 53.3445488184 +11 43 40.066038660 15.318 15.06 14.448   13.569 G0V 57 0
78 NGC 2682 106 V* 08 51 17.3469363072 +11 47 00.664213272 13.671 13.638 13.069   12.393 ~ 66 0
79 NGC 2682 115 V* 08 51 18.5413189200 +11 49 21.513324180 13.309 13.26 12.645 12.274 11.924 F9IV 91 0
80 NGC 2682 127 V* 08 51 20.1237509496 +11 46 41.751494436 13.336 13.32 12.776   12.08 ~ 87 0
81 NGC 2682 129 * 08 51 20.5508066664 +11 46 04.890109584 13.826 13.75 13.308   12.490 ~ 66 0
82 Cl* NGC 2682 ES I-54 * 08 51 21.7681061880 +11 44 05.087968692 14.976 14.89 14.186   13.421 ~ 49 0
83 NGC 2682 140 Ro* 08 51 22.0511842656 +11 46 41.010219552 13.811 13.797 13.189 12.834 12.496 ~ 78 0
84 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
85 NGC 2682 159 * 08 51 27.8885213448 +11 55 40.949794380 14.598 13.94 13.320   12.625 G1IV 56 0
86 Cl* NGC 2682 ES III-9 * 08 51 27.9474345912 +11 50 11.918733972 15.180 15.08 14.491   13.669 G4V 46 0
87 Cl* NGC 2682 ES III-13 * 08 51 29.9638737600 +11 51 09.062555832 14.821 14.72 14.191 13.773 13.398 G2V 49 0
88 NGC 2682 178 * 08 51 31.9171704744 +11 51 16.663779036 14.694 14.63 14.030 13.704 13.304 G0V 40 0
89 Cl* NGC 2682 ES II-7 * 08 51 36.0753333984 +11 47 47.048568468 15.268 15.14 14.486   13.745 G1V 48 0
90 NGC 2682 209 * 08 51 39.0509285256 +11 47 55.413468276 14.461 14.33 13.783   12.992 ~ 64 0
91 Cl* NGC 2682 ES II-14 * 08 51 41.4950722613 +11 47 36.175042934 14.804 14.71 14.188   13.382 G2V 48 0
92 NGC 2682 226 * 08 51 44.0075287632 +11 46 24.535277112 13.749 13.549 12.790   11.928 G0 72 0
93 IC 2602 OpC 10 42 27.1 -64 25 34           ~ 675 0
94 NGC 3680 70 * 11 25 03.4757162376 -43 17 26.302286508   15.220 14.651     ~ 25 0
95 NGC 3680 OpC 11 25 34.1 -43 14 24   8.40 7.6     ~ 319 0
96 NGC 3680 60 * 11 26 20.7065904912 -43 13 07.467128544   14.99 14.36     ~ 30 0
97 Cl* NGC 3960 PMS 310758 ? 11 50 26.750 -55 40 28.20   14.084 12.945   11.697 ~ 8 0
98 Cl* NGC 3960 PMS 310756 ? 11 50 28.184 -55 41 36.66   14.366 13.194   11.907 ~ 8 0
99 NGC 3960 OpC 11 50 34.6 -55 40 44   9.07 8.3     ~ 140 0
100 Cl* NGC 3960 PMS 310757 ? 11 50 36.050 -55 42 05.40   14.323 13.062   11.679 ~ 5 0
101 Cl* NGC 3960 PMS 310760 ? 11 50 37.621 -55 40 15.19   14.224 13.060   11.758 ~ 5 0
102 Cl* NGC 3960 PMS 310761 ? 11 50 38.100 -55 39 44.50   14.309 13.100   11.787 ~ 8 0
103 Cl* Collinder 261 SBR 2 * 12 37 34.6668240312 -68 23 25.400484528   14.384 12.937   11.345 ~ 20 0
104 Cl* Collinder 261 PJM 1526 * 12 37 53.9612400648 -68 21 48.833839476   15.657 14.27   12.85 ~ 17 0
105 Cl* Collinder 261 PJM 1481 * 12 37 55.2242262144 -68 22 36.044467284   15.429 13.95   12.44 ~ 19 0
106 Cl* Collinder 261 SBR 11 * 12 37 59.7130932984 -68 23 49.784777520   15.438 14.145   12.654 ~ 13 0
107 Cl Collinder 261 OpC 12 38 04.6 -68 22 37     10.7     ~ 192 0
108 Cl* Collinder 261 PJM 1080 * 12 38 07.2702295824 -68 22 31.010100492   15.387 13.952   12.472 ~ 22 0
109 Cl* Collinder 261 PJM 906 HB* 12 38 12.3753763440 -68 20 31.633973844   15.526 14.164   12.72 ~ 21 0
110 Cl* Collinder 261 SBR 5 ** 12 38 12.68232 -68 21 50.5584   14.760 14.139 12.933 12.635 ~ 7 0
111 NGC 5822 OpC 15 04 12.2 -54 21 58           ~ 208 0
112 Cl* NGC 5822 TA 11014 * 15 04 35.3020493712 -54 17 37.545141408 16.334 15.182 14.423 14.51   ~ 9 0
113 Cl* NGC 5822 TA 11003 * 15 04 54.2483851032 -54 15 48.387190356   15.43 14.66 14.42 13.90 ~ 8 0
114 NGC 6134 OpC 16 27 48.7 -49 09 40   7.89 7.2     ~ 152 0
115 NGC 6192 OpC 16 40 18.5 -43 21 18           ~ 90 0
116 NGC 6192 35 * 16 40 24.1622783448 -43 22 47.214133320   14.38 13.70     ~ 6 0
117 Cl* NGC 6192 PMR 9 * 16 40 34.4 -43 28 12     14.565     ~ 2 0
118 Cl* NGC 6192 KF 12 * 16 40 36.3563733288 -43 23 55.787273088     14.949     ~ 5 0
119 Cl* NGC 6192 PMR 45 * 16 40 36.9574506144 -43 25 46.715424672     14.818     ~ 5 0
120 Cl* NGC 6253 TAD 52 RB? 16 58 51.1920370752 -52 36 57.717307800   13.989 12.700 12.017 11.300 ~ 12 0
121 Cl* NGC 6253 EIS 69885 * 16 58 52.3124231448 -52 41 40.990276428   15.127 14.341 13.931 13.430 ~ 15 0
122 Cl* NGC 6253 EIS 23501 * 16 58 53.2523864664 -52 42 43.534699020   15.094 14.275 13.842 13.322 ~ 14 0
123 NGC 6253 OpC 16 59 06.7 -52 42 43     10.2     ~ 186 0
124 [TGB2011] J165912.9183-524136.015 RG* 16 59 12.9241216176 -52 41 35.903146848   14.645 13.501 12.852 12.193 ~ 18 0
125 Cl* NGC 6253 EIS 23498 MS? 16 59 21.3563214672 -52 42 43.384379940   14.767 13.912 13.454 12.934 ~ 12 0
126 Cl* IC 4651 MEI 6081 * 17 24 31.8192107640 -49 59 08.591260884           ~ 15 0
127 Cl* IC 4651 AMC 4226 * 17 24 43.4557289976 -50 01 01.275456828           ~ 18 0
128 IC 4651 17 * 17 24 48.0970940376 -49 55 47.356824144   15.250 14.545     ~ 13 0
129 IC 4651 OpC 17 24 50.9 -49 55 01           ~ 350 0
130 IC 4651 65 * 17 24 59.9718574488 -49 53 07.834464996       14.41   ~ 17 0
131 IC 4651 43 * 17 25 14.2401503784 -49 56 43.669147992   14.89 14.193     ~ 23 0
132 NGC 6475 OpC 17 53 47.3 -34 50 28           ~ 384 0
133 IC 4756 368 * 18 37 37.6956654408 +05 31 00.419299212 14.60 14.23 13.38     ~ 5 0
134 Cl* IC 4756 HER 165 * 18 38 18.8409758256 +05 31 02.863451964   14.31 13.591 13.110 12.650 G5V 8 0
135 IC 4756 OpC 18 38 35.8 +05 26 06           ~ 241 0
136 IC 4756 425 * 18 38 47.2849416456 +05 16 24.979311768 14.61 14.24 13.48 13.70   G2V 10 0
137 NGC 7142 OpC 21 45 09.6 +65 46 55   10.36 9.3     ~ 143 0
138 NGC 7789 OpC 23 57 20.2 +56 43 34   7.68 6.7     ~ 528 0

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