2011AJ....142...22R

Query : 2011AJ....142...22R

2011AJ....142...22R - Astron. J., 142, 22 (2011/July-0)

Heavy-element dispersion in the metal-poor globular cluster M92.

ROEDERER I.U. and SNEDEN C.

Abstract (from CDS):

Dispersion among the light elements is common in globular clusters (GCs), while dispersion among heavier elements is less common. We present detection of r-process dispersion relative to Fe in 19 red giants of the metal-poor GC M92. Using spectra obtained with the Hydra multi-object spectrograph on the WIYN Telescope at Kitt Peak National Observatory, we derive differential abundances for 21 species of 19 elements. The Fe-group elements, plus Y and Zr, are homogeneous at a level of 0.07-0.16 dex. The heavy-elements La, Eu, and Ho exhibit clear star-to-star dispersion spanning 0.5-0.8 dex. The abundances of these elements are correlated with one another, and we demonstrate that they were produced by r-process nucleosynthesis. This r-process dispersion is not correlated with the dispersion in C, N, or Na in M92, indicating that r-process inhomogeneities were present in the gas throughout star formation. The r-process dispersion is similar to that previously observed in the metal-poor GC M15, but its origin in M15 or M92 is unknown at present.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: individual: NGC 6341 - nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: Population II

VizieR on-line data: <Available at CDS (J/AJ/142/22): table2.dat table3.dat table6.dat abund.dat>

Simbad objects: 55

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Number of rows : 55
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 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
2 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
3 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
4 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
6 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
7 BPS CS 22878-0101 Pe* 16 45 31.4513454168 +08 14 45.470265900   14.601   13.603 12.673 KIIvw 62 0
8 NGC 6341 6007 Pe* 17 16 29.0182100496 +43 09 43.801815168   14.24 13.50     ~ 23 0
9 2MASS J17163427+4307363 AB* 17 16 34.2796322976 +43 07 36.312016944   14.54 13.70     ~ 29 0
10 NGC 6341 7018 RG* 17 16 37.4894075472 +43 06 15.600437640   13.47 12.18     ~ 77 0
11 2MASS J17163772+4308411 AB* 17 16 37.7287390416 +43 08 41.137118808   14.55 13.73     ~ 30 0
12 NGC 6341 5045 RG* 17 16 49.8559809624 +43 10 41.184279768   13.87 12.83     ~ 39 0
13 NGC 6341 8024 AB* 17 16 50.3460701112 +43 05 53.130343884   14.763 14.089 14.074   ~ 27 0
14 NGC 6341 7079 RG* 17 16 51.1790091072 +43 06 43.479066456   14.94 14.21     ~ 21 0
15 NGC 6341 7068 RG* 17 16 51.8515755144 +43 08 03.112412928   14.99 14.27     ~ 22 0
16 NGC 6341 5084 * 17 16 53.0042355528 +43 09 42.482348460   16.35 15.66     ~ 6 0
17 NGC 6341 8044 RG* 17 16 55.5107588064 +43 05 03.498829584   14.89 14.06     ~ 31 0
18 Cl* NGC 6341 CUD 11 RG* 17 16 56.1969453672 +43 06 12.156291288   15.47       ~ 16 0
19 2MASS J17165652+4310314 AB* 17 16 56.5218625728 +43 10 31.451381184   15.08 14.48     ~ 16 0
20 NGC 6341 4010 RG* 17 16 57.7296026160 +43 14 11.428571580   14.37 13.42     ~ 44 0
21 NGC 6341 4002 RG* 17 16 58.8346068840 +43 15 11.470684752   14.44 13.55     ~ 43 0
22 2MASS J17170033+4311478 AB* 17 17 00.3241126824 +43 11 47.796723636   14.65 13.88     ~ 35 0
23 NGC 6341 9049 RG* 17 17 00.4274196984 +43 05 11.581639476   14.74 13.85     ~ 33 0
24 NGC 6341 4079 RG* 17 17 00.8120658960 +43 10 25.142722104   14.38 13.46     ~ 33 0
25 NGC 6341 9010 RG* 17 17 03.9395713056 +43 02 03.028597548   15.38 14.64     ~ 25 0
26 NGC 6341 9089 RG* 17 17 06.4699234200 +43 06 02.837620080   14.92 14.18     ~ 23 0
27 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
28 NGC 6341 11080 RG* 17 17 14.6735260824 +43 06 24.756095736   13.937 12.963 12.815   ~ 23 0
29 Cl* NGC 6341 BARN 110 RG* 17 17 15.3050115552 +43 09 46.533487428   14.88 14.11     ~ 16 0
30 NGC 6341 10028 RG* 17 17 15.5135726640 +43 04 59.336002056   15.34 14.62     ~ 20 0
31 NGC 6341 11010 * 17 17 17.8974181704 +43 06 50.760396360   14.90       ~ 6 0
32 NGC 6341 11038 RG* 17 17 17.9276455872 +43 05 43.869854292   15.35 14.59     ~ 19 0
33 NGC 6341 11019 RG* 17 17 18.7509075720 +43 04 50.891873916   13.815 12.821 12.702   ~ 29 0
34 NGC 6341 3011 RG* 17 17 19.0841666520 +43 12 54.683242308   15.92 15.23     ~ 24 0
35 2MASS J17171967+4314422 AB* 17 17 19.6730704560 +43 14 42.305920404   14.82 14.14     ~ 33 0
36 NGC 6341 12034 AB* 17 17 21.5728009872 +43 07 40.805455044   14.31 13.42 13.294   ~ 33 0
37 NGC 6341 2039 RG* 17 17 21.6637221960 +43 11 03.133453092   15.14 14.33     ~ 29 0
38 NGC 6341 2024 RG* 17 17 22.0539131448 +43 12 03.409690464   15.32 14.54     ~ 21 0
39 2MASS J17172238+4306563 AB* 17 17 22.3808962944 +43 06 56.266882776   15.08 14.44     ~ 22 0
40 NGC 6341 1040 RG* 17 17 22.6860780360 +43 08 50.430068052   15.51 14.78     ~ 19 0
41 NGC 6341 12031 RG* 17 17 22.7170118424 +43 07 47.413856244   14.80 13.95 13.870   ~ 13 0
42 NGC 6341 2012 RG* 17 17 29.5233360744 +43 12 14.747940792   15.37 14.64     ~ 28 0
43 NGC 6341 12008 RG* 17 17 31.7161838520 +43 05 41.460088704   13.82 12.76     ~ 62 0
44 NGC 6341 12005 RG* 17 17 37.0040967696 +43 06 45.725815584   15.64 14.88     ~ 21 0
45 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
46 HD 175305 RG* 18 47 06.4416868934 +74 43 31.451436187 8.07 7.93 7.18 6.52 6.03 G5III 239 0
47 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
48 HD 186478 SB* 19 45 14.1409752672 -17 29 27.071239056   10.116 9.302 8.527 7.961 K2III 166 0
49 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
50 BPS CS 29495-0041 Pe* 21 36 33.2900452248 -28 18 48.440793960 14.111 14.15 13.34   12.222 ~ 33 0
51 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 472 0
52 HD 221170 Pe* 23 29 28.8087143040 +30 25 57.849303180 9.43 8.74 7.66     CEMP-r 306 0
53 NGC 6341 92 * ~ ~           ~ 2 0
54 NGC 6341 96 * ~ ~           ~ 2 0
55 NGC 6341 103 * ~ ~           ~ 2 0

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