2016ApJ...824...75O


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.10CEST01:45:41

2016ApJ...824...75O - Astrophys. J., 824, 75-75 (2016/June-3)

New neutron-capture measurements in 23 open clusters. I the r-process.

OVERBEEK J.C., FRIEL E.D. and JACOBSON H.R.

Abstract (from CDS):

Neutron-capture elements, those with Z > 35, are the least well understood in terms of nucleosynthesis and formation environments. The rapid neutron-capture, or r-process, elements are formed in the environments and/or remnants of massive stars, while the slow neutron-capture, or s-process, elements are primarily formed in low-mass AGB stars. These elements can provide much information about Galactic star formation and enrichment, but observational data are limited. We have assembled a sample of 68 stars in 23 open clusters that we use to probe abundance trends for six neutron-capture elements (Eu, Gd, Dy, Mo, Pr, and Nd) with cluster age and location in the disk of the Galaxy. In order to keep our analysis as homogeneous as possible, we use an automated synthesis fitting program, which also enables us to measure multiple (3-10) lines for each element. We find that the pure r-process elements (Eu, Gd, and Dy) have positive trends with increasing cluster age, while the mixed r- and s-process elements (Mo, Pr, and Nd) have insignificant trends consistent with zero. Pr, Nd, Eu, Gd, and Dy have similar, slight (although mostly statistically significant) gradients of ∼0.04 dex kpc–1. The mixed elements also appear to have nonlinear relationships with RGC.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: abundances - open clusters and associations: general - stars: abundances

VizieR on-line data: <Available at CDS (J/ApJ/824/75): stars.dat table1.dat table2.dat table3.dat table4.dat table6.dat table7.dat table9.dat>

Simbad objects: 103

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Number of rows : 103

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MASS J00422570+8516219 RG* 00 42 25.6246259731 +85 16 22.081653231 15.194 14.096 12.939 12.298 11.758 ~ 23 0
2 2MASS J00455119+8518082 SB* 00 45 51.1731289470 +85 18 08.355027290 15.098 13.79 12.48 11.706 11.099 ~ 29 0
3 NGC 188 2088 * 00 47 18.4813943549 +85 19 45.788086827 15.367 14.21 12.99 12.329 11.753 ~ 27 0
4 NGC 188 OpC 00 48 26 +85 15.3           ~ 813 0
5 2MASS J00485910+8512294 SB* 00 48 59.0896422221 +85 12 29.617220201 15.734 14.746 13.634 13.014 12.487 ~ 19 0
6 NGC 1193 OpC 03 05 56.0 +44 23 00     12.6     ~ 66 0
7 Cl* NGC 1193 KAL 282 * 03 05 57.6097896720 +44 22 42.414371859   15.38 14.29 14.35   ~ 10 0
8 2MASS J03143407+4714170 * 03 14 34.0700200335 +47 14 17.105720996   15.261 13.814     ~ 6 0
9 NGC 1245 125 * 03 14 36.1847374119 +47 13 50.961065326   15.004 13.423     ~ 5 0
10 NGC 1245 10 * 03 14 39.7722135441 +47 14 40.044233586   15.515 14.144     ~ 8 0
11 NGC 1245 OpC 03 14 48 +47 15.2   9.16 8.4     ~ 123 0
12 NGC 1245 382 * 03 14 54.4064851291 +47 17 12.412736275   14.80 13.44     ~ 6 0
13 NGC 1817 79 * 05 12 10.6737905789 +16 38 31.110894645   13.54 12.443     ~ 19 0
14 NGC 1817 OpC 05 12 15 +16 41.4   8.44 7.7     ~ 152 0
15 NGC 1817 73 * 05 12 24.6513760181 +16 35 48.863216377   13.12 12.057     ~ 21 0
16 Cl* NGC 1817 MMU 1456 * 05 12 32.8316640665 +16 28 25.484636132   12.98 11.370     ~ 9 0
17 NGC 1817 206 * 05 13 01.8087261579 +16 41 14.366425674     11.749     ~ 10 0
18 2MASS J05202386+3037219 RG* 05 20 23.8732064400 +30 37 21.949064938     14.93     ~ 13 0
19 2MASS J05203650+3030351 RG* 05 20 36.4958562101 +30 30 35.114815686     14.09     ~ 13 0
20 Cl Berkeley 17 OpC 05 20 37 +30 35.4           ~ 133 0
21 Cl Berkeley 17 117 * 05 20 47.7524368388 +30 31 40.874420260     15.11     ~ 9 0
22 Cl* Berkeley 18 K 1383 * 05 22 10.70 +45 28 49.4   16.82 15.07   13.13 ~ 6 0
23 Cl* Berkeley 18 K 1163 * 05 22 13.80 +45 27 58.9   17.42 15.79   13.93 ~ 6 0
24 Cl King 22 OpC 05 22 24 +45 24.3           ~ 48 0
25 2MASS J05255167+4629353 * 05 25 51.6724336768 +46 29 35.318826281   15.03 13.25 12.6   ~ 7 0
26 2MASS J05255362+4626203 * 05 25 53.6219744147 +46 26 20.284446400   14.91 13.30 12.8   ~ 6 0
27 NGC 1883 OpC 05 25 54.0 +46 29 24     12.0     ~ 36 0
28 Cl Berkeley 21 OpC 05 51 42 +21 47.0   12.26 11.1     ~ 90 0
29 Cl Berkeley 21 50 * 05 51 42.0101268417 +21 48 49.809400483   17.578 15.873     ~ 12 0
30 Cl* Berkeley 21 TPM 51 * 05 51 42.04 +21 48 03.1   17.395 15.694   13.63 ~ 8 0
31 Cl Berkeley 22 OpC 05 58.4 +07 50           ~ 63 0
32 Cl* Berkeley 22 K 414 * 05 58 25.90 +07 46 11.4   17.636 15.762   13.738 ~ 8 0
33 Cl* Berkeley 22 K 643 * 05 58 26.90 +07 45 26.1   16.599 14.313   11.662 ~ 7 0
34 NGC 2141 4009 * 06 02 50.7853286308 +10 30 28.106117753     13.27     ~ 10 0
35 NGC 2141 OpC 06 02 55 +10 26.8   10.43 9.4     ~ 115 0
36 NGC 2141 5013 * 06 03 00.0248250580 +10 32 23.493540836   15.21 13.96     ~ 6 0
37 NGC 2141 3240 * 06 03 01.5539542819 +10 28 34.733366823   15.13 13.33     ~ 11 0
38 NGC 2141 4025 * 06 03 07.5541800043 +10 26 49.218941376   15.34 14.06     ~ 6 0
39 NGC 2158 4230 * 06 07 14.0762742327 +24 06 54.702374017   14.79 13.17 12.70   ~ 10 0
40 NGC 2158 OpC 06 07 25 +24 05.8           ~ 244 0
41 NGC 2194 57 * 06 13 31.6861563718 +12 46 50.158311118   15.10 13.550     ~ 9 0
42 NGC 2194 OpC 06 13 46 +12 49.1   9.03 8.5     ~ 66 1
43 NGC 2194 55 * 06 13 46.9232198486 +12 48 13.456667939   15.13 13.552     ~ 9 0
44 Cl Berkeley 31 OpC 06 57 36 +08 16.0           ~ 94 0
45 2MASS J06573740+0815591 RG* 06 57 37.4064447423 +08 15 59.121389197           ~ 4 0
46 Cl* Berkeley 32 KM 4 * 06 58 03.1682290107 +06 24 22.201465134 15.471 13.817 12.324   10.773 ~ 13 0
47 Cl* Berkeley 32 KM 2 * 06 58 03.3901521826 +06 26 49.873746868 15.442 13.733 12.201     ~ 12 0
48 Cl Berkeley 32 OpC 06 58 06 +06 26.0           ~ 107 0
49 Cl* Berkeley 32 KM 16 * 06 58 06.945 +06 25 56.45 15.393 14.670 13.611   12.478 ~ 11 0
50 Cl* Berkeley 32 KM 18 * 06 58 13.7543991236 +06 27 54.868346776 15.536 14.768 13.713   12.550 ~ 16 0
51 GSC 00775-00538 * 07 16 52.8292050382 +13 48 35.104835151   13.285 12.150     ~ 8 0
52 NGC 2355 OpC 07 16 59 +13 45.0     9.7     ~ 65 0
53 Cl* NGC 2355 MMU 398 * 07 17 05.1974055938 +13 44 55.156766303   10.94 9.786     ~ 12 0
54 TYC 775-1198-1 * 07 17 19.8852509585 +13 46 12.686441444   12.80 12.575     ~ 8 0
55 Cl* Berkeley 39 FMP 21366 * 07 46 41.4376141678 -04 39 08.464628710   15.619 14.417   13.132 ~ 10 0
56 Cl Berkeley 39 OpC 07 46 42 -04 36.0           ~ 152 1
57 Cl* Berkeley 39 KR 5 * 07 46 47.6010997133 -04 39 56.256808655   15.286 13.995   12.500 ~ 14 0
58 Cl* Berkeley 39 KUBVI 1139 * 07 46 54.1492473613 -04 38 58.223901036   15.489 14.359   13.113 ~ 12 0
59 NGC 2682 105 RG* 08 51 17.0998688216 +11 48 16.177322855   11.554 10.316 9.942 9.07 K2III 122 0
60 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2037 0
61 NGC 2682 141 RG* 08 51 22.8037504415 +11 48 01.780643224   11.570 10.346 10.180 9.40 ~ 119 0
62 BD+12 1926 RG* 08 51 29.9056917233 +11 47 16.877217672   11.004 9.555 9.360 8.36 K3III 124 0
63 NGC 3680 OpC 11 25 38 -43 14.6   8.40 7.6     ~ 290 0
64 Cl* Collinder 261 PJM 1080 * 12 38 07.2702740490 -68 22 31.009721591   15.387 13.952   12.472 ~ 14 0
65 Cl* Collinder 261 PJM 1045 * 12 38 08.3564264262 -68 21 15.217022304   15.034 13.547   12.017 ~ 11 0
66 Cl Collinder 261 OpC 12 38 11.5 -68 22 01     10.7     ~ 156 0
67 * 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 2136 0
68 Cl* NGC 6192 MMU 137 ** 16 40 11.4165356550 -43 24 00.783455196   12.981 11.223   9.465 G9III 11 0
69 Cl* NGC 6192 MMU 96 SB* 16 40 16.4598602973 -43 22 37.609513616   12.808 11.306   9.804 G2III 12 0
70 NGC 6192 96 * 16 40 18.3908051278 -43 25 46.544476417     14.063     ~ 4 0
71 NGC 6192 9 * 16 40 18.4237278582 -43 23 14.377418872   13.26 12.67     ~ 4 0
72 NGC 6192 45 * 16 40 18.7468975681 -43 24 57.948978192     14.222     ~ 3 0
73 NGC 6192 OpC 16 40 23 -43 22.0     8.5     ~ 66 0
74 CD-43 10987 * 16 40 24.2112151707 -43 20 07.892882324   13.288 11.743   10.197 ~ 12 0
75 CD-43 10991 * 16 40 40.8093678329 -43 22 59.430407358   12.93 11.40   9.92 ~ 11 0
76 NGC 6253 OpC 16 59 05 -52 42.0     10.2     ~ 144 0
77 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11613 0
78 NGC 6791 OpC 19 20 53 +37 46.3   10.52 9.5     ~ 871 0
79 NGC 6939 53 * 20 31 01.6 +60 42 14   14.16 12.86     ~ 7 0
80 2MASS J20310189+6038116 RG* 20 31 01.8951607281 +60 38 11.613956472           ~ 3 0
81 2MASS J20310597+6042139 RG* 20 31 05.9726555392 +60 42 13.823624440   13.85 12.55     ~ 8 0
82 NGC 6939 121 * 20 31 24.3041655725 +60 37 43.126892303   13.50 12.41     ~ 11 0
83 NGC 6939 OpC 20 31 30 +60 39.7   8.85 7.8     ~ 134 0
84 2MASS J20314054+6037084 RG* 20 31 40.5500907734 +60 37 08.205367917   13.72 12.03     ~ 12 0
85 Cl* NGC 7142 HOAG 10 * 21 45 00.7328677326 +65 45 56.524278818 16.01 14.816 13.452   11.984 ~ 12 0
86 NGC 7142 OpC 21 45 10.0 +65 46 18   10.36 9.3     ~ 120 0
87 Cl* NGC 7142 CT 229 * 21 45 10.0084807549 +65 51 16.556733951   14.43 12.71 12.22   ~ 5 0
88 NGC 7142 98 * 21 45 29.4605365591 +65 46 28.990246556   14.58 13.46     ~ 6 0
89 NGC 7142 7 * 21 45 35.6713114791 +65 44 59.085944203 16.37 14.69 13.08     ~ 7 0
90 NAME PWM 4 OpC 23 50 53 +62 19.4           ~ 17 0
91 2MASS J23505744+6220031 * 23 50 57.449 +62 20 03.20   18.40 16.19     ~ 4 0
92 NGC 7789 212 * 23 56 40.9729634337 +56 41 47.042857049     13.260   11.944 ~ 6 0
93 NGC 7789 468 * 23 57 08.0502781201 +56 43 21.600852812   12.75 11.6115   9.722 K4III 31 0
94 NGC 7789 605 * 23 57 19.2104910358 +56 40 51.425246163   14.05 12.8171   11.482 K0III 18 0
95 NGC 7789 OpC 23 57 24 +56 42.5   7.68 6.7     ~ 455 0
96 NGC 7789 765 RG* 23 57 31.8478560889 +56 41 22.052458606   12.80 11.59   10.053 ~ 31 0
97 NGC 1817 1456 ? ~ ~           ~ 1 0
98 NGC 2141 1821 ? ~ ~           ~ 1 0
99 NGC 7789 958 ? ~ ~           ~ 1 0
100 NGC 6192 137 ? ~ ~           ~ 1 0
101 Cl* Berkeley 39 KR 3 * ~ ~   14.90 13.55     ~ 11 0
102 NGC 6939 31 * ~ ~   12.99 11.16     ~ 6 0
103 NGC 2141 514 ? ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.08.10-01:45:41

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