2019MNRAS.490.1498L

Query : 2019MNRAS.490.1498L

2019MNRAS.490.1498L - Mon. Not. R. Astron. Soc., 490, 1498-1508 (2019/December-1)

Detailed study of the Milky Way globular cluster Laevens 3.

LONGEARD N., MARTIN N., IBATA R.A., COLLINS M.L.M., LAEVENS B.P.M., BELL E. and MACKEY D.

Abstract (from CDS):

We present a photometric and spectroscopic study of the Milky Way satellite Laevens 3. Using MegaCam/Canada-France-Hawaii Telescope g and i photometry and Keck II/DEIMOS multi-object spectroscopy, we refine the structural and stellar properties of the system. The Laevens 3 colour-magnitude diagram shows that it is quite metal-poor, old (13.0 ±1.0 Gyr), and at a distance of 61.4 ±1.0 kpc, partly based on two RR Lyrae stars. The system is faint (MV=–2.8+0.2^–0.3 mag) and compact (rh=11.4±_1.0 pc). From the spectroscopy, we constrain the systemic metallicity ( [Fe/H]spectro = -1.8 ±0.1 dex) but the metallicity and velocity dispersions are both unresolved. Using Gaia DR2, we infer a mean proper motion of (µα^*,µ^δ)=(0.51±0.28,–0.83±_0.27) mas yr–1, which, combined with the system's radial velocity (<vr>=–70.2±0.5 km s–1), translates into a halo orbit with a pericenter and apocenter of 40.7 +5.6–14.7 and 85.6+17.2–5.9 kpc, respectively. Overall, Laevens 3 shares the typical properties of the Milky Way's outer halo globular clusters. Furthermore, we find that this system shows signs of mass segregation that strengthens our conclusion that Laevens 3 is a globular cluster.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Local Group

Simbad objects: 84

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Number of rows : 84
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 Tuc IV G 00 02.9 -60 51           ~ 90 0
2 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
3 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
4 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
5 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
6 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 267 1
7 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
8 NAME E 1 GlC 03 55 02.5 -49 36 52           ~ 229 0
9 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
12 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
13 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
14 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
15 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
16 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
17 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
18 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 117 1
19 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
20 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
21 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
22 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
23 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
24 NAME Munoz 1 Cl* 15 01 48.02 +66 58 07.3           ~ 29 0
25 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
26 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
27 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 399 0
28 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
29 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
30 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
31 PSO J316.6389+15.0599 * 21 06 33.36700 +15 03 35.8000           ~ 1 0
32 PSO J316.6570+15.0619 * 21 06 37.69500 +15 03 42.9200           ~ 1 0
33 Gaia DR3 1760258811161916032 * 21 06 38.2678486560 +15 02 35.215714932           ~ 1 0
34 Gaia DR3 1760259227774203392 * 21 06 38.5626214608 +15 04 27.949221048           ~ 1 0
35 Gaia DR3 1760259154759366784 * 21 06 38.8570277736 +15 04 03.779974668           ~ 1 0
36 Gaia DR3 1760260494789299584 * 21 06 38.9797656480 +15 07 17.743200888           ~ 1 0
37 Gaia DR3 1760258746738663168 * 21 06 40.5266574696 +15 01 12.112518720           ~ 1 0
38 Gaia DR3 1760258742442414592 * 21 06 41.4572975280 +15 01 57.131244084           ~ 1 0
39 Gaia DR3 1760258879881397632 * 21 06 44.1025149240 +15 02 39.515635680           ~ 1 0
40 Gaia DR3 1760246926988663040 * 21 06 44.5490804856 +15 00 43.331650668           ~ 1 0
41 Gaia DR3 1760258948600900992 * 21 06 45.2719711776 +15 03 14.934735792           ~ 1 0
42 Gaia DR3 1760258982960663168 * 21 06 45.5179221792 +15 03 46.770577812           ~ 1 0
43 PSO J316.6901+15.0310 * 21 06 45.63300 +15 01 52.0200           ~ 1 0
44 Gaia DR3 1760246995706526464 * 21 06 45.6436976328 +15 01 04.358374500           ~ 1 0
45 PSO J316.6996+15.0103 * 21 06 47.91400 +15 00 37.4100           ~ 1 0
46 Gaia DR3 1760246961348400384 * 21 06 48.3452348232 +15 00 53.207689212           ~ 1 0
47 Gaia DR3 1760246750893674240 * 21 06 51.1256029800 +15 00 45.719252784           ~ 1 0
48 Gaia DR3 1760246750893683328 * 21 06 51.2647636296 +15 00 57.834694620           ~ 1 0
49 PSO J316.7172+15.0343 * 21 06 52.14100 +15 02 03.7400           ~ 1 0
50 ZTF J210653.03+145839.1 RR* 21 06 53.0324718792 +14 58 39.094075164           ~ 9 0
51 Gaia DR3 1760244345711879552 * 21 06 53.7777016248 +14 58 01.018695396           ~ 1 0
52 PSO J316.7243+14.9926 * 21 06 53.84400 +14 59 33.4800           ~ 1 0
53 Gaia DR3 1760245891905354624 * 21 06 53.8573804968 +14 58 55.493527980           ~ 1 0
54 NAME Laevens 3 GlC 21 06 54.3 +14 58 48           ~ 43 0
55 PSO J316.7266+15.0516 * 21 06 54.39800 +15 03 05.8100           ~ 1 0
56 Gaia DR3 1760245891900145280 * 21 06 54.4802785200 +14 58 43.310729460           ~ 1 0
57 PSO J316.7273+14.9774 * 21 06 54.57000 +14 58 38.7700           ~ 1 0
58 Gaia DR3 1760245896194883584 * 21 06 54.7430880264 +14 58 52.306439700           ~ 1 0
59 PSO J316.7285+14.9533 * 21 06 54.85900 +14 57 11.9800           ~ 1 0
60 PSO J316.7320+14.9769 * 21 06 55.68800 +14 58 37.1200           ~ 1 0
61 Gaia DR3 1760244143849982336 * 21 06 56.0624582088 +14 56 57.419249928           ~ 1 0
62 Gaia DR3 1760245827476078080 * 21 06 56.3427729672 +14 58 08.002448148           ~ 1 0
63 Gaia DR3 1760245823180626944 * 21 06 57.3228226920 +14 57 57.837897000           ~ 1 0
64 PSO J316.7487+14.9561 * 21 06 59.69500 +14 57 22.1100           ~ 1 0
65 Gaia DR3 1760246819613158016 * 21 07 00.0766275888 +15 00 55.503864756           ~ 1 0
66 EQ J210701.1+145833.4 * 21 07 01.14100 +14 58 33.4700           ~ 1 0
67 Gaia DR3 1760240806658698496 * 21 07 02.3299053792 +14 54 03.441372300           ~ 1 0
68 Gaia DR3 1760242593365166976 * 21 07 03.9363999312 +14 56 28.478911020           ~ 1 0
69 Gaia DR3 1760242593365179264 * 21 07 04.4507064000 +14 56 49.358507208           ~ 1 0
70 PSO J316.7703+14.9808 * 21 07 04.89800 +14 58 51.0100           ~ 1 0
71 Gaia DR3 1760240806658703616 * 21 07 06.0339691944 +14 54 15.092181036           ~ 1 0
72 PSO J316.7819+14.9130 * 21 07 07.68800 +14 54 47.0800           ~ 1 0
73 PSO J316.7921+14.9492 * 21 07 10.11700 +14 56 57.3900           ~ 1 0
74 PSO J316.7967+14.8995 * 21 07 11.23400 +14 53 58.6700           ~ 1 0
75 Gaia DR3 1760242455925564672 * 21 07 14.0656245768 +14 56 35.797567668           ~ 1 0
76 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
77 NAME Gru II G 22 04.1 -46 26           ~ 110 0
78 NAME Balbinot 1 Cl* 22 10 42.819 +14 56 49.03           ~ 29 0
79 NAME Kim 1 Cl* 22 11 41.30 +07 01 31.8           ~ 31 0
80 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
81 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
82 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 307 1
83 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
84 NAME Local Group GrG ~ ~           ~ 9325 0

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