2007ApJ...663..844M

Query : 2007ApJ...663..844M

2007ApJ...663..844M - Astrophys. J., 663, 844-856 (2007/July-2)

Super star cluster velocity dispersions and virial masses in the M 82 nuclear starburst.

McCRADY N. and GRAHAM J.R.

Abstract (from CDS):

We use high-resolution near-infrared spectroscopy from Keck Observatory to measure the stellar velocity dispersions of 19 super star clusters (SSCs) in the nuclear starburst of M82. The clusters have ages on the order of 10 Myr, which is many times longer than the crossing times implied by their velocity dispersions and radii. We therefore apply the virial theorem to derive the kinematic mass for 15 of the SSCs. The SSCs have masses of 2x105 to 4x106 M☉, with a total population mass of 1.4x107 M☉. Comparison of the loci of the young M82 SSCs and old Milky Way globular clusters in a plot of radius versus velocity dispersion suggests that the SSCs are a population of potential globular clusters. We present the mass function for the SSCs and find a power-law fit with an index of γ=-1.91±0.06. This result is nearly identical to the mass function of young SSCs in the Antennae galaxies.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Individual: Messier Number: M82 - Galaxies: Starburst - Galaxies: Star Clusters - Infrared: Galaxies

Nomenclature: Table 2, Fig.2: MGG a (Nos a, b, j, y, z) added, MGG NN (No. 10) added.

Simbad objects: 59

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Number of rows : 59
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
4 V* SU Per s*r 02 22 06.8948309496 +56 36 14.893650072 13.86 11.57 9.40     M3-M4Iab 151 0
5 V* W Per s*r 02 50 37.8929743824 +56 59 00.287654892 14.80 12.24 9.62 6.99 4.75 M3Iab-M5I 121 0
6 IC 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
7 NAME NGC 1569 CL* A1 Cl* 04 30 48.1 +64 50 59           ~ 25 1
8 NAME NGC 1569 CL* A2 Cl* 04 30 48.11 +64 50 58.8           ~ 23 1
9 NAME NGC 1569 CL* A Cl* 04 30 48.2 +64 50 59   15.45 15.22     ~ 106 1
10 NAME NGC 1569 CL* B Cl* 04 30 49.0 +64 50 53           ~ 77 0
11 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
12 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 692 1
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
14 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
15 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
16 * psi01 Aur s*r 06 24 53.9015502096 +49 17 16.411221960 8.85 6.67 4.75 3.36 2.29 K5-M1Iab-Ib 178 0
17 HD 63586 * 07 52 36.4267830648 +55 12 33.976797516 6.310 6.360 6.370     A0Vn 39 0
18 HD 74604 * 08 48 49.2514876608 +66 42 29.087293572   6.078 6.187     B7III 53 0
19 HD 82327 * 09 36 06.7742731824 +74 19 07.707352116   6.354 6.444     B9III 37 0
20 [SWG2006] L Cl* 09 55 46.78 +69 40 36.9           ~ 18 0
21 [SWG2006] F Cl* 09 55 47.08 +69 40 42.3   17.61 16.50   14.94 ~ 62 0
22 MGG b Cl* 09 55 48.3 +69 40 41           ~ 2 0
23 MGG c Cl* 09 55 48.8 +69 40 42           ~ 2 0
24 MGG 11 Cl* 09 55 50.2 +69 40 45           ~ 72 0
25 MGG 9 Cl* 09 55 50.5 +69 40 45           ~ 27 0
26 MGG 7 Cl* 09 55 50.5 +69 40 46           ~ 5 0
27 [LHL2013] 563 GlC 09 55 50.61 +69 40 42.6 23.01 23.461 21.169   18.869 ~ 6 0
28 MGG 6 Cl* 09 55 51.3 +69 40 46           ~ 6 0
29 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
30 MGG k Cl* 09 55 52.5 +69 40 43           ~ 3 0
31 MGG m Cl* 09 55 52.6 +69 40 43           ~ 3 0
32 MGG q Cl* 09 55 52.8 +69 40 50           ~ 4 0
33 MGG 3 Cl* 09 55 52.9 +69 40 44           ~ 4 0
34 [SWG2006] A1 Cl* 09 55 53.5 +69 40 49           ~ 32 0
35 MGG 1b Cl* 09 55 53.6 +69 40 48           ~ 3 0
36 MGG 1c Cl* 09 55 53.7 +69 40 49           ~ 5 0
37 MGG r Cl* 09 55 54.8 +69 40 53           ~ 3 0
38 MGG s Cl* 09 55 56.0 +69 40 52           ~ 2 0
39 MGG t Cl* 09 55 57.1 +69 40 54           ~ 3 0
40 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
41 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
42 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
43 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
44 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
45 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
46 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
47 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
48 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
49 * 19 UMi Pu* 16 10 49.5244396608 +75 52 39.222532704   5.370 5.473     B8V 65 0
50 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
51 HD 173087 ** 18 42 08.0883472656 +34 44 46.751348076   6.346 6.473     B5V 82 0
52 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
53 MGG j Cl* ~ ~           ~ 1 0
54 MGG a Cl* ~ ~           ~ 1 0
55 NAME Local Group GrG ~ ~           ~ 9325 0
56 MGG h Cl* ~ ~           ~ 1 0
57 MGG z Cl* ~ ~           ~ 2 0
58 MGG 10 Cl* ~ ~           ~ 1 0
59 MGG y Cl* ~ ~           ~ 1 0

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