2016ApJ...824....5B

Query : 2016ApJ...824....5B

2016ApJ...824....5B - Astrophys. J., 824, 5-5 (2016/June-2)

Chemical abundances in NGC 5024 (M53): a mostly first generation globular cluster.

BOBERG O.M., FRIEL E.D. and VESPERINI E.

Abstract (from CDS):

We present the Fe, Ca, Ti, Ni, Ba, Na, and O abundances for a sample of 53 red giant branch stars in the globular cluster (GC) NGC 5024 (M53). The abundances were measured from high signal-to-noise medium resolution spectra collected with the Hydra multi-object spectrograph on the Wisconsin-Indiana-Yale-NOAO 3.5 m telescope. M53 is of interest because previous studies based on the morphology of the cluster's horizontal branch suggested that it might be composed primarily of first generation (FG) stars and differ from the majority of other GCs with multiple populations, which have been found to be dominated by the second generation (SG) stars. Our sample has an average [Fe/H]=-2.07 with a standard deviation of 0.07 dex. This value is consistent with previously published results. The alpha-element abundances in our sample are also consistent with the trends seen in Milky Way halo stars at similar metallicities, with enhanced [Ca/Fe] and [Ti/Fe] relative to solar. We find that the Na-O anti-correlation in M53 is not as extended as other GCs with similar masses and metallicities. The ratio of SG to the total number of stars in our sample is approximately 0.27 and the SG generation is more centrally concentrated. These findings further support that M53 might be a mostly FG cluster and could give further insight into how GCs formed the light element abundance patterns we observe in them today.

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

Journal keyword(s): Galaxy: abundances - globular clusters: individual: NGC 5024

VizieR on-line data: <Available at CDS (J/ApJ/824/5): table2.dat table3.dat ew.dat>

Simbad objects: 99

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Number of rows : 99
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 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
3 Cl* NGC 5024 RLB 8 RG* 13 12 28.5900249240 +18 15 05.145479280     13.83     ~ 9 0
4 Cl* NGC 5024 RLB 37 * 13 12 29.0481717600 +18 07 16.086407880     14.29     ~ 1 0
5 Cl* NGC 5024 RLB 101 RG* 13 12 35.0587311768 +18 14 28.583798568     15.25     ~ 12 0
6 Cl* NGC 5024 SAW V84 RG* 13 12 36.1753655928 +18 07 31.974328488   15.481 14.77 14.731 13.591 ~ 21 0
7 Cl* NGC 5024 RLB 27 RG* 13 12 37.3657762872 +18 08 23.156090880   15.40 14.08   12.70 ~ 17 0
8 Cl* NGC 5024 RLB 67 * 13 12 38.2999126872 +18 11 04.619224752     14.80     ~ 2 0
9 Cl* NGC 5024 RLB 44 RG* 13 12 43.9377709248 +18 10 09.207065532     14.41     ~ 10 0
10 Cl* NGC 5024 RLB 108 RG* 13 12 44.0969751336 +18 10 46.510475376     15.30     ~ 2 0
11 Cl* NGC 5024 SAN 14 * 13 12 45.2068697928 +18 11 57.449665392   15.0 14.92     ~ 2 0
12 Cl* NGC 5024 RLB 4 RG* 13 12 45.5211084600 +18 11 28.895911584     13.78     ~ 19 0
13 Cl* NGC 5024 RLB 124 RG* 13 12 47.4671115840 +18 14 40.500891024     15.42     ~ 3 0
14 Cl* NGC 5024 RLB 131 RG* 13 12 47.5174474032 +18 14 30.981578244     15.47     ~ 2 0
15 Cl* NGC 5024 RLB 49 * 13 12 47.5419059208 +18 10 23.151346320     14.55     ~ 1 0
16 Cl* NGC 5024 RLB 39 RG* 13 12 47.6861552712 +18 10 06.002040936     14.34     ~ 15 0
17 Cl* NGC 5024 RLB 72 RG* 13 12 47.9380102824 +18 06 32.058531072   15.939 14.901 14.763 13.74 ~ 20 0
18 Cl* NGC 5024 RLB 70 RG* 13 12 48.0857311800 +18 14 15.885900276     14.85     ~ 2 0
19 2MASS J13124817+1809458 AB* 13 12 48.17400 +18 09 45.8676     15.44     ~ 8 0
20 Cl* NGC 5024 RLB 53 RG* 13 12 48.1900132272 +18 12 46.485776088   15.67 14.59   13.39 ~ 17 0
21 Cl* NGC 5024 RLB 122 RG* 13 12 48.3767268624 +18 12 08.612662932     15.40     ~ 3 0
22 Cl* NGC 5024 RLB 40 RG* 13 12 48.6008575320 +18 14 15.599627232   15.54 14.34   13.06 ~ 4 0
23 Cl* NGC 5024 RLB 112 AB* 13 12 49.5954936888 +18 08 24.613003212     15.31     ~ 2 0
24 Cl* NGC 5024 RLB 91 RG* 13 12 49.680 +18 11 13.57     15.11     ~ 2 0
25 Cl* NGC 5024 RLB 87 RG* 13 12 49.8713871096 +18 11 48.683917104     15.08     ~ 13 0
26 Cl* NGC 5024 RLB 55 RG* 13 12 49.9071833064 +18 10 02.308198764     14.62     ~ 1 0
27 Cl* NGC 5024 RLB 110 RG* 13 12 50.0338288752 +18 10 06.072762648     15.31     ~ 2 0
28 Cl* NGC 5024 RLB 111 RG* 13 12 50.3823607728 +18 14 39.088867344     15.31     ~ 17 0
29 Cl* NGC 5024 RLB 29 RG* 13 12 50.4303875760 +18 08 53.657898144   15.40 14.11   12.74 ~ 4 0
30 2MASS J13125069+1810396 RG* 13 12 50.6977816224 +18 10 39.577288260     13.962   12.605 ~ 5 0
31 Cl* NGC 5024 RLB 76 * 13 12 50.740 +18 09 47.27     14.91     ~ 1 0
32 Cl* NGC 5024 RLB 15 RG* 13 12 50.9529351216 +18 09 36.012252456     13.93     ~ 2 0
33 Cl* NGC 5024 RLB 123 * 13 12 51.2210610360 +18 11 01.947747192     15.40     ~ 1 0
34 Cl* NGC 5024 RLB 6 * 13 12 51.4180680720 +18 11 07.973883132     13.82     ~ 1 0
35 Cl* NGC 5024 RLB 130 RG* 13 12 52.2031701456 +18 07 36.152560128     15.47     ~ 10 0
36 Cl* NGC 5024 RLB 80 RG* 13 12 52.370 +18 09 40.03     14.93     ~ 1 0
37 Cl* NGC 5024 RLB 88 RG* 13 12 52.5069013392 +18 10 24.519186516     15.08     ~ 1 0
38 Cl* NGC 5024 RLB 62 RG* 13 12 52.6959421920 +18 09 39.185655156     14.75     ~ 1 0
39 Cl* NGC 5024 SAW V86 RG* 13 12 52.7226308544 +18 10 27.978544488     14.08     ~ 5 0
40 Cl* NGC 5024 RLB 24 RG* 13 12 52.8006394824 +18 09 32.302008144     14.07     ~ 1 0
41 Cl* NGC 5024 RLB 132 RG* 13 12 53.7281285304 +18 11 26.583337860     15.49     ~ 3 0
42 Cl* NGC 5024 RLB 104 RG* 13 12 53.8790882928 +18 08 41.957468160     15.28     ~ 3 0
43 Cl* NGC 5024 RLB 22 * 13 12 54.0480239856 +18 10 23.695830840     14.06     ~ 1 0
44 Cl* NGC 5024 RLB 21 * 13 12 54.190 +18 09 25.79     14.05     ~ 1 0
45 Cl* NGC 5024 RLB 13 RG* 13 12 54.500 +18 09 18.13     13.87     ~ 1 0
46 Cl* NGC 5024 RLB 19 RG* 13 12 54.650 +18 09 58.05     14.03     ~ 1 0
47 Cl* NGC 5024 RLB 42 * 13 12 54.9240012576 +18 11 47.574192588     14.40     ~ 1 0
48 Cl* NGC 5024 RLB 86 RG* 13 12 54.9624609288 +18 05 35.082482316     15.08     ~ 17 0
49 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 907 0
50 Cl* NGC 5024 RLB 25 RG* 13 12 55.2780940392 +18 09 51.199453152     14.07     ~ 1 0
51 2MASS J13125532+1809420 NIR 13 12 55.320 +18 09 42.04     13.67     ~ 4 0
52 Cl* NGC 5024 RLB 61 RG* 13 12 55.5923667312 +18 13 13.844397324   15.79 14.74   13.59 ~ 4 0
53 Cl* NGC 5024 RLB 78 RG* 13 12 55.5997210392 +18 11 12.936775344     14.91     ~ 1 0
54 Cl* NGC 5024 RLB 10 RG* 13 12 55.6517389392 +18 11 23.624486412     13.84     ~ 2 0
55 Cl* NGC 5024 RLB 34 RG* 13 12 55.8298359624 +18 08 44.761244028     14.25     ~ 1 0
56 Cl* NGC 5024 RLB 3 RG* 13 12 55.8499890648 +18 10 03.835728228     13.69     ~ 1 0
57 Cl* NGC 5024 RLB 47 RG* 13 12 56.0085490848 +18 11 08.190764592     14.52     ~ 2 0
58 2MASS J13125616+1810194 RG* 13 12 56.1651920928 +18 10 19.347597012     13.85     ~ 4 0
59 Cl* NGC 5024 RLB 5 RG* 13 12 56.230 +18 10 08.28     13.81     ~ 1 0
60 Cl* NGC 5024 RLB 43 RG* 13 12 56.3449652424 +18 08 47.901387480     14.41     ~ 1 0
61 Cl* NGC 5024 RLB 97 RG* 13 12 56.5053932232 +18 12 37.452067308     15.21     ~ 13 0
62 Cl* NGC 5024 SAW V68 RG* 13 12 56.5708094016 +18 08 23.084391372     13.85     ~ 4 0
63 [SS2011] VC20 V* 13 12 56.590 +18 10 48.30     15.09 16.591   ~ 3 0
64 Cl* NGC 5024 RLB 1 PM* 13 12 56.8791968424 +18 10 53.166696240     12.56     ~ 1 0
65 Cl* NGC 5024 KLEM B2 * 13 12 56.93 +18 10 11.5     14.01     ~ 2 0
66 Cl* NGC 5024 RLB 20 RG* 13 12 56.9440390968 +18 08 41.915762340   15.34 14.04   12.69 ~ 4 0
67 Cl* NGC 5024 RLB 52 * 13 12 57.020 +18 10 35.06     14.59     ~ 1 0
68 Cl* NGC 5024 RLB 60 RG* 13 12 57.2555059224 +18 06 04.988806668     14.73     ~ 14 0
69 Cl* NGC 5024 RLB 31 * 13 12 57.380 +18 10 43.30     14.13     ~ 1 0
70 Cl* NGC 5024 RLB 7 RG* 13 12 57.7094560224 +18 09 00.588284820     13.82     ~ 2 0
71 Cl* NGC 5024 RLB 95 RG* 13 12 58.5646235544 +18 09 13.512112920     15.19     ~ 2 0
72 Cl* NGC 5024 RLB 118 RG* 13 12 58.7087647944 +18 11 34.400908104     15.35     ~ 1 0
73 Cl* NGC 5024 RLB 85 RG* 13 12 58.9906915248 +18 09 09.741811284     15.02     ~ 2 0
74 NGC 5024 4416 RG* 13 12 59.1538940856 +18 14 35.550126816     13.95     ~ 22 0
75 Cl* NGC 5024 RLB 83 * 13 12 59.4361382640 +18 09 25.053202476     15.00     ~ 1 0
76 Cl* NGC 5024 RLB 107 RG* 13 13 00.1199696328 +18 12 17.677237320     15.30     ~ 4 0
77 Cl* NGC 5024 RLB 64 RG* 13 13 00.940 +18 12 01.22     14.76     ~ 2 0
78 ZTF J131301.01+181009.5 LP* 13 13 01.0228571664 +18 10 09.553093176     14.08     ~ 9 0
79 Cl* NGC 5024 RLB 113 * 13 13 01.1146709832 +18 10 21.358292664     15.31     ~ 2 0
80 2MASS J13130138+1807307 AB* 13 13 01.3738469856 +18 07 30.757340604     15.46     ~ 9 0
81 Cl* NGC 5024 SAW V66 RG* 13 13 01.5765897096 +18 10 03.910652724     13.83     ~ 6 0
82 2MASS J13130189+1810238 AB* 13 13 01.8868594248 +18 10 23.855421252     14.95     ~ 9 0
83 Cl* NGC 5024 RLB 68 RG* 13 13 02.4611071944 +18 13 23.357610228   15.86 14.83   13.68 ~ 19 0
84 Cl* NGC 5024 RLB 38 AB* 13 13 02.9305580544 +18 11 06.602887104     14.31     ~ 2 0
85 Cl* NGC 5024 RLB 77 RG* 13 13 03.3470691699 +18 11 43.518892768     14.91     ~ 10 0
86 Cl* NGC 5024 RLB 23 * 13 13 03.6628187328 +18 09 38.855262132   15.39 14.07   12.69 ~ 3 0
87 Cl* NGC 5024 RLB 99 RG* 13 13 04.4206499136 +18 08 55.674127680     15.24     ~ 17 0
88 Cl* NGC 5024 SAW V65 RG* 13 13 04.6702313832 +18 10 59.431944540     13.91     ~ 13 0
89 Cl* NGC 5024 RLB 54 RG* 13 13 05.3061752352 +18 14 51.010537524   15.69 14.62   13.42 ~ 16 0
90 Cl* NGC 5024 RLB 84 RG* 13 13 09.4544452968 +18 11 18.878448084     15.01     ~ 9 0
91 Cl* NGC 5024 RLB 128 RG* 13 13 10.0591573032 +18 06 15.238316952     15.45     ~ 17 0
92 Cl* NGC 5024 RLB 75 * 13 13 11.2098257304 +18 13 08.276513556     14.90     ~ 1 0
93 Cl* NGC 5024 RLB 51 RG* 13 13 17.3591672400 +18 14 46.394184804   15.64 14.56   13.35 ~ 20 0
94 Cl* NGC 5024 RLB 66 * 13 13 21.4197847200 +18 04 21.460499076     14.79     ~ 1 0
95 Cl* NGC 5024 RLB 82 * 13 13 22.6266128760 +18 10 09.392998872     14.98     ~ 1 0
96 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 675 0
97 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
98 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
99 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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