2008ApJ...684.1159Y

Query : 2008ApJ...684.1159Y

2008ApJ...684.1159Y - Astrophys. J., 684, 1159-1169 (2008/September-2)

Nitrogen abundances in giant stars of the globular cluster NGC 6752.

YONG D., GRUNDAHL F., JOHNSON J.A. and ASPLUND M.

Abstract (from CDS):

We present N abundances for 21 bright giants in the globular cluster NGC 6752 based on high-resolution UVES spectra of the 3360 Å NH lines. We confirm that the Strömgren c1 index traces the N abundance and find that the star-to-star N abundance variation is 1.95 dex, at the sample's luminosity. We find statistically significant correlations, but small-amplitude variations, between the abundances of N and α-, Fe-peak, and s-process elements. Analyses using model atmospheres with appropriate N, O, Na, and Al abundances would strengthen, rather than mute, these correlations. If the small variations of heavy elements are real, then the synthesis of the N anomalies must take place in stars which also synthesize α-, Fe-peak, and s-process elements. These correlations offer support for contributions from both asymptotic giant branch and massive stars to the globular cluster abundance anomalies.

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Journal keyword(s): Galaxy: Abundances - Galaxy: Globular Clusters: Individual: NGC Number: NGC 6752 - Stars: Abundances

Simbad objects: 38

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Number of rows : 38
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
7 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
8 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
9 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
10 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
11 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
12 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
13 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
14 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
15 Cl* NGC 6752 BUON 4446 RG* 19 10 14.9559748296 -59 59 13.414731468   14.59 13.78     ~ 15 0
16 Cl* NGC 6752 YGN 29 RG* 19 10 16.6112031624 -60 00 59.767765308     14.18     ~ 13 0
17 Cl* NGC 6752 BUON 4216 RG* 19 10 19.5305698584 -60 00 30.156575040   14.520 13.698     ~ 17 0
18 NGC 6752 67 RG* 19 10 25.9459355640 -59 59 05.050889808   14.38 13.59     ~ 18 0
19 Cl* NGC 6752 YGN 6 * 19 10 34.3616645352 -59 59 55.028925744   14.43 13.40     ~ 9 0
20 NGC 6752 57 RG* 19 10 36.4928689368 -59 56 07.703392560   14.62 14.00     ~ 18 0
21 Cl* NGC 6752 YGN 30 Pe* 19 10 38.8613425608 -59 59 47.296470264     14.19     ~ 10 0
22 Cl* NGC 6752 CBG 14537 RG* 19 10 43.8200177558 -59 59 41.502972220   14.913 14.135     ~ 17 0
23 Cl* NGC 6752 BUON 3103 * 19 10 45 -59 58.3     13.56     ~ 7 0
24 Cl* NGC 6752 YGN 1 * 19 10 47 -60 00.7     13.27     ~ 6 0
25 NGC 6752 5 RG* 19 10 48.6380923344 -60 01 55.414478928   14.402 13.743 13.633   ~ 18 0
26 Cl* NGC 6752 BUON 2728 RG* 19 10 49.9412104080 -60 02 25.640269368   14.528 13.697     ~ 13 0
27 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
28 Cl* NGC 6752 YGN 7 * 19 10 56.6307863736 -60 00 41.575798368   14.30 13.46     ~ 7 0
29 Cl* NGC 6752 YGN 3 RG* 19 10 59.6123988384 -59 56 40.510533516   14.27 13.35     ~ 13 0
30 Cl* NGC 6752 YGN 0 * 19 11 03 -59 59.5     13.03     ~ 4 0
31 NGC 6752 28 RG* 19 11 11.1684637896 -60 00 16.942232952   14.07 13.33     ~ 19 0
32 NGC 6752 37 RG* 19 11 11.6425951848 -59 58 28.749173376   14.89 14.08     ~ 21 0
33 NGC 6752 17 RG* 19 11 13.4059513224 -60 02 30.244768548   14.85 14.06     ~ 20 0
34 NGC 6752 32 RG* 19 11 18.5097639600 -59 59 41.691616980   14.58 13.63     ~ 17 0
35 Cl* NGC 6752 BUON 1113 RG* 19 11 23.1147114120 -59 59 39.720399864   14.815 14.002     ~ 19 0
36 Cl* NGC 6752 YGN 4 RG* 19 11 32.6634739224 -60 00 02.105715024   14.322 13.491     ~ 18 0
37 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
38 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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