2011ApJ...740...60C

Query : 2011ApJ...740...60C

2011ApJ...740...60C - Astrophys. J., 740, 60 (2011/October-3)

The peculiar chemical inventory of NGC 2419: an extreme outer halo "Globular cluster".

COHEN J.G., HUANG W. and KIRBY E.N.

Abstract (from CDS):

NGC 2419 is a massive outer halo Galactic globular cluster (GC) whose stars have previously been shown to have somewhat peculiar abundance patterns. We have observed seven luminous giants that are members of NGC 2419 with Keck/HIRES at reasonable signal-to-noise ratio. One of these giants is very peculiar, with an extremely low [Mg/Fe] and high [K/Fe] but normal abundances of most other elements. The abundance pattern does not match the nucleosynthetic yields of any supernova model. The other six stars show abundance ratios typical of inner halo Galactic GCs, represented here by a sample of giants in the nearby GC M30. Although our measurements show that NGC 2419 is unusual in some respects, its bulk properties do not provide compelling evidence for a difference between inner and outer halo GCs.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: formation - Galaxy: halo - globular clusters: individual: NGC 2419

VizieR on-line data: <Available at CDS (J/ApJ/740/60): table1.dat ew2419.dat ew7099.dat>

CDS comments: Note that "AL 38" in table 1, is not the SIMBAD object AL 38 but number #38 of Alcaino & Liller (1980AJ.....85.1330A) = 2MASS J21401982-2313509 in SIMBAD.

Simbad objects: 29

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Number of rows : 29
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 Cl* NGC 2419 SKK 1 RG* 07 37 47.0765649696 +38 50 16.382761512   18.77 17.25   15.63 ~ 8 0
2 2MASS J07380598+3852055 RG* 07 38 05.9851093321 +38 52 05.602076940   18.56 17.31   15.85 ~ 4 1
3 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
4 Cl* NGC 2419 SKK 14 RG* 07 38 09.7731938280 +38 50 45.408630660   18.71 17.26   15.76 ~ 9 0
5 Cl* NGC 2419 SKK 15 RG* 07 38 09.9221783880 +38 49 36.579030816   18.83 17.45     ~ 6 0
6 [KGS2008] J073813.5+385257 RG* 07 38 13.4816224636 +38 52 57.553320404   18.88 17.61   16.21 ~ 5 0
7 Cl* NGC 2419 RH 28 RG* 07 38 14.9493462048 +38 51 51.547402872   18.74 17.41   15.951 ~ 6 0
8 2MASS J07381690+3853351 RG* 07 38 16.9056502680 +38 53 35.075721120   18.90 17.61   16.23 ~ 10 0
9 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 354 1
10 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 379 1
11 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
12 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
13 2MASS J15080497+6714007 RB? 15 08 04.9809417768 +67 14 00.719756844           ~ 24 0
14 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
15 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
16 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
17 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
18 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
19 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
20 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 460 0
21 2MASS J21401297-2310326 RG* 21 40 12.9748364328 -23 10 32.702018088   15.39 14.65 14.578   ~ 4 0
22 Cl* NGC 7099 AL 38 RG* 21 40 19.8223815240 -23 13 50.973546036   14.299 13.301 13.130   ~ 11 0
23 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0
24 2MASS J21403107-2310333 RG* 21 40 31.0754626536 -23 10 33.417862464   14.845 13.920 13.756   ~ 11 0
25 2MASS J21403224-2312091 RG* 21 40 32.2404396264 -23 12 09.247128012   14.99 14.25     ~ 3 0
26 2MASS J21403856-2310587 RG* 21 40 38.5608399792 -23 10 58.830435948   14.61 13.60 13.398   ~ 14 0
27 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0
28 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 330 0
29 V* BX Scl SX* 23 43 54.4551676392 -28 18 34.627551660   13.82 13.56     A 43 0

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