2011MNRAS.411.1536H

Query : 2011MNRAS.411.1536H

2011MNRAS.411.1536H - Mon. Not. R. Astron. Soc., 411, 1536-1546 (2011/March-1)

Radial velocity and metallicity of the globular cluster IC4499 obtained with AAOmega.

HANKEY W.J. and COLE A.A.

Abstract (from CDS):

We present radial velocity and metallicity measurements for the far southern Galactic globular cluster IC 4499. We selected several hundred target red giant stars in and around the cluster from the 2MASS point source catalogue, and obtained spectra at the near-infrared calcium triplet using the AAOmega spectrograph. Observations of giants in globular clusters M4, M22 and M68 were taken to provide radial velocity and metallicity comparison objects. Based on velocity data we conclude that 43 of our targets are cluster members, by far the largest sample of IC 4499 giants spectroscopically studied. We determine the mean heliocentric radial velocity of the cluster to be 31.5 ±0.4 km/s, and find the most likely central velocity dispersion to be 2.5±0.5 km/s. This leads to a dynamical mass estimate for the cluster of 93±37 {x} 103 M☉. We are sensitive to cluster rotation down to an amplitude of ≈1 km/s, but no evidence for cluster rotation is seen. The cluster metallicity is found to be [Fe/H]=-1.52±0.12 on the Carretta-Gratton scale; this is in agreement with some earlier estimates but carries significantly higher precision. The radial velocity of the cluster, previously highly uncertain, is consistent with membership in the Monoceros tidal stream as proposed by Penarrubia and co-workers, but also with a halo origin. The horizontal branch morphology of the cluster is slightly redder than average for its metallicity, but it is likely not unusually young compared to other clusters of the halo. The new constraints on the cluster kinematics and metallicity may give insight into its extremely high specific frequency of RR Lyrae stars.

Based on observations made with the Anglo-Australian Telescope operated at Siding Spring Observatory by the Anglo-Australian Observatory.


Abstract Copyright: 2010 The Authors Monthly Notices of the Royal Astronomical Society2010 RAS

Journal keyword(s): stars: abundances - stars: late-type - globular clusters: individual: IC 4499

VizieR on-line data: <Available at CDS (J/MNRAS/411/1536): table3.dat>

Nomenclature: Table 3: [HC2011] NNNN N=43 among (Nos 4976-7910).

Simbad objects: 64

goto Full paper

goto View the references in ADS

Number of rows : 64
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 NAME Fornax H1 Cl* 02 37 02.1 -34 11 00     16.59     ~ 107 0
2 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
3 IC 449 AG? 06 45 41.1731967072 +71 20 37.876853148   13.7       ~ 22 0
4 2MASX J11180379+3109125 AG? 11 18 03.7979388792 +31 09 12.674065860   16       ~ 15 0
5 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 379 1
6 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
7 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
8 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
9 2MASS J14571837-8210415 RG* 14 57 18.3321495336 -82 10 41.599791048           ~ 2 0
10 2MASS J14574075-8210337 RG* 14 57 40.7558555208 -82 10 33.808847088           ~ 3 0
11 2MASS J14581915-8208308 RG* 14 58 19.1646925296 -82 08 30.845853672           ~ 2 0
12 2MASS J14583861-8210308 RG* 14 58 38.6102545008 -82 10 30.849111948           ~ 2 0
13 2MASS J14584081-8210360 RG* 14 58 40.7974782552 -82 10 36.011226504           ~ 1 0
14 2MASS J14585439-8216340 RG* 14 58 54.3560058288 -82 16 34.154249052           ~ 2 0
15 2MASS J14585477-8203445 RG* 14 58 54.8244272784 -82 03 44.493209892           ~ 2 0
16 2MASS J14585648-8213141 RG* 14 58 56.4626326752 -82 13 14.068603272           ~ 1 0
17 2MASS J14585902-8208332 RG* 14 58 59.0315036640 -82 08 33.292954320           ~ 2 0
18 2MASS J14590137-8210508 RG* 14 59 01.4084527680 -82 10 50.772477720           ~ 2 0
19 2MASS J14591865-8212405 RG* 14 59 18.6728381818 -82 12 40.532314025           ~ 2 0
20 2MASS J14593340-8209178 RG* 14 59 33.4301312544 -82 09 17.860581720           ~ 2 0
21 2MASS J14594000-8212228 RG* 14 59 40.0357365288 -82 12 22.816345032           ~ 2 0
22 2MASS J14594044-8216040 RG* 14 59 40.4833728528 -82 16 04.126371060           ~ 3 0
23 2MASS J14594217-8210058 RG* 14 59 42.1995046896 -82 10 05.857669380           ~ 1 0
24 2MASS J14594522-8214472 RG* 14 59 45.2445814848 -82 14 47.282841744           ~ 2 0
25 2MASS J14594675-8216156 RG* 14 59 46.7357383896 -82 16 15.646459800           ~ 3 0
26 2MASS J14594729-8211091 RG* 14 59 47.3465701368 -82 11 09.060478044           ~ 2 0
27 2MASS J14594784-8214130 RG* 14 59 47.8944003504 -82 14 13.137690084           ~ 1 0
28 2MASS J14595074-8213106 RG* 14 59 50.7786283536 -82 13 10.587896724           ~ 2 0
29 2MASS J14595526-8213131 RG* 14 59 55.2518734296 -82 13 13.235092032           ~ 2 0
30 2MASS J15000566-8215517 RG* 15 00 05.6463024672 -82 15 51.721312356           ~ 2 0
31 2MASS J15000681-8211523 RG* 15 00 06.8713572768 -82 11 52.159927308           ~ 2 0
32 2MASS J15001058-8211170 RG* 15 00 10.6431070776 -82 11 16.921514652           ~ 3 0
33 2MASS J15001701-8211114 RG* 15 00 17.0842263696 -82 11 11.351763744           ~ 2 0
34 2MASS J15001712-8216351 RG* 15 00 17.1556611648 -82 16 34.899394404           ~ 2 0
35 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 375 0
36 2MASS J15003425-8214455 RG* 15 00 34.2737024712 -82 14 45.353860224           ~ 3 0
37 2MASS J15003829-8211120 RG* 15 00 38.3314830552 -82 11 11.958204336           ~ 2 0
38 2MASS J15003911-8213170 RG* 15 00 39.1408380174 -82 13 16.831796341           ~ 2 0
39 2MASS J15004215-8208324 RG* 15 00 42.2105142648 -82 08 32.333053920           ~ 2 0
40 2MASS J15004732-8212516 RG* 15 00 47.3638798728 -82 12 51.500256372           ~ 1 0
41 2MASS J15005150-8212509 RG* 15 00 51.3957891384 -82 12 51.101038224           ~ 1 0
42 2MASS J15005889-8214091 RG* 15 00 58.9213267440 -82 14 08.901835764           ~ 1 0
43 2MASS J15010575-8212573 RG* 15 01 05.7721619304 -82 12 57.268427652           ~ 2 0
44 2MASS J15010598-8212369 RG* 15 01 05.983 -82 12 36.93           ~ 1 0
45 2MASS J15012153-8213455 RG* 15 01 21.536 -82 13 45.51           ~ 1 0
46 2MASS J15012551-8220144 RG* 15 01 25.5137132688 -82 20 14.470765008           ~ 2 0
47 2MASS J15013146-8212247 RG* 15 01 31.5257270939 -82 12 24.685136891           ~ 2 0
48 2MASS J15014980-8213397 RG* 15 01 49.8735987840 -82 13 39.555901632           ~ 2 0
49 2MASS J15015558-8210456 RG* 15 01 55.6143946896 -82 10 45.585751044           ~ 3 0
50 2MASS J15021416-8215349 RG* 15 02 14.2005087096 -82 15 34.871906556           ~ 2 0
51 2MASS J15025438-8211435 RG* 15 02 54.3733231920 -82 11 43.487479284           ~ 2 0
52 2MASS J15045601-8220085 RG* 15 04 55.9967339496 -82 20 08.512504800           ~ 1 0
53 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 424 0
54 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
55 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
56 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
57 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
58 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
59 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
60 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
61 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0
62 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 307 1
63 NAME Galactic Bulge reg ~ ~           ~ 4794 0
64 NAME Monoceros Stream St* ~ ~           ~ 374 1

To bookmark this query, right click on this link: simbad:objects in 2011MNRAS.411.1536H and select 'bookmark this link' or equivalent in the popup menu