2006ApJ...643.1166F


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.09CEST20:21:14

2006ApJ...643.1166F - Astrophys. J., 643, 1166-1179 (2006/June-1)

Discovery of an extraordinarily massive cluster of red supergiants.

FIGER D.F., MacKENTY J.W., ROBBERTO M., SMITH K., NAJARRO F., KUDRITZKI R.P. and HERRERO A.

Abstract (from CDS):

We report the discovery of an extraordinarily massive young cluster of stars in the Galaxy, having an inferred total initial cluster mass comparable to the most massive young clusters in the Galaxy. Using IRMOS, 2MASS, and Spitzer observations, we conclude that there are 14 red supergiants in the cluster, compared with five, in what was previously thought to be the richest Galactic cluster of such stars. We infer spectral types from near-infrared spectra that reveal deep CO bandhead absorption that can only be fit by red supergiants. We identify a gap of ΔKs∼4 mag between the stars and the bulk of the other stars in the region that can only be fit by models if the brightest stars in the cluster are red supergiants. We estimate a distance of 5.8 kpc to the cluster by associating an OH maser with the envelope of one of the stars. We also identify a ``yellow'' supergiant of G6 I type in the cluster. Assuming a Salpeter IMF, we infer an initial cluster mass of 20,000-40,000 Mfor cluster ages of 7-12 Myr. Continuing with these assumptions, we find that 80% of the initial mass and 99% of the number of stars remain at the present time. We associate the cluster with an X-ray source (detected by ASCA and Einstein), a recently discovered very high energy γ-ray source (detected by INTEGRAL and HESS), and several nonthermal radio sources, finding that these objects are likely related to recent supernovae in the cluster. In particular, we claim that the cluster has produced at least one recent supernova remnant with properties similar to the Crab Nebula.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Evolution - Stars: Supergiants

Nomenclature: Table 1: [FMR2006] NN (Nos 1-15).

Errata: Erratum vol. 646, p.1452 (2006)

Status at CDS:  

CDS comments: Massive star cluster in the title is [BDS2003] 122

Simbad objects: 47

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Number of rows : 47

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9303 1
2 NGC 869 OpC 02 19 00 +57 07.7           ~ 425 0
3 Ass Per OB 1 As* 02 21 +57.6           ~ 159 1
4 NGC 884 OpC 02 22 23 +57 07.5           ~ 443 0
5 V* S Per s*r 02 22 51.7103845023 +58 35 11.454759954 13.22 10.55 7.90     M4.5-7Iae 353 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14637 1
7 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4763 1
8 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5549 4
9 SN 1987A SN* 05 35 28.020 -69 16 11.07   4.75 4.81     SNIIpec 4435 2
10 V* VY CMa s*r 07 22 58.32877 -25 46 03.2355 12.01 10.19 7.95     M5Iae 991 0
11 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 457 0
12 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11336 0
13 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 623 0
14 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 435 0
15 V* VX Sgr s*r 18 08 04.0431479808 -22 13 26.629744195 11.72 9.41 6.52 3.90 2.11 M8.5Ia 540 0
16 PSR J1837-0653 Psr 18 37 14.65 -06 53 02.1           ~ 29 0
17 AX J1837.5-0653 X 18 37.5 -06 53           ~ 3 0
18 [FMR2006] 14 s?r 18 37 47.6464713416 -06 53 02.562581027           M1I 5 0
19 [FMR2006] 4 s?r 18 37 50.8989839480 -06 53 38.414176605           M0I 6 0
20 [GH2008] 8 X 18 37 51.518 -06 53 43.61           ~ 8 0
21 [FMR2006] 11 s?r 18 37 51.7426090899 -06 51 49.871355861           M1I 5 0
22 Cul 1835-069 Rad 18 37 52.3 -06 54 13           ~ 2 0
23 GPSR 025.237-0.150 Rad 18 37 52.32 -06 54 47.6           ~ 6 0
24 [HC89] 38 Rad 18 37 53.0 -06 53 35           ~ 2 0
25 GRS G025.25 -00.15 Rad 18 37 54.2 -06 53 56           ~ 3 0
26 [FMR2006] 7 s?r 18 37 54.3246187301 -06 52 34.782608081           M2I 6 0
27 [FMR2006] 8 s?r 18 37 55.1976545381 -06 52 10.873714020           M3I 4 0
28 [FMR2006] 2 s?r 18 37 55.3016172727 -06 52 48.506809785           M4I 6 0
29 [FMR2006] 5 s?r 18 37 55.5234281637 -06 52 12.355045887           M6I 6 0
30 [FMR2006] 1 s?r 18 37 56.3124976666 -06 52 32.179392498           M3I 7 0
31 NSV 11126 V* 18 37 56.4 -06 52 37           ~ 3 0
32 [FMR2006] 6 s?r 18 37 57.4631667449 -06 53 25.413584985           M5I 4 0
33 [FMR2006] 9 s?r 18 37 57.7779491317 -06 52 22.320625689           M3I 4 0
34 [FMR2006] 15 s?y 18 37 57.7978549989 -06 52 32.002047628           G6I 5 0
35 RSGC 1 OpC 18 37 58 -06 53.0           ~ 84 0
36 GPSR 025.266-0.161 Rad 18 37 58.07 -06 53 30.9           ~ 5 0
37 OH 25.284 -0.156 s*r 18 37 58.9060133221 -06 52 32.148642945           M3I 7 0
38 [FMR2006] 10 s?r 18 37 59.5443443119 -06 53 32.027670066           M5I 5 0
39 [FMR2006] 3 s?r 18 37 59.7420805390 -06 53 49.499164873           M4I 7 0
40 NAME X18 * 18 38 01.63 -06 55 23.6           ~ 4 0
41 PSR J1838-0655 Psr 18 38 03.13 -06 55 33.4           ~ 76 1
42 [GH2008] 14 SNR 18 38 03.13 -06 55 33.4           ~ 69 2
43 [FMR2006] 12 s?r 18 38 03.3156035440 -06 52 45.137730377           M0I 5 0
44 GRS G024.80 +00.10 SFR 18 38 14.8 -06 47 39           ~ 100 0
45 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 777 0
46 NML Cyg s*r 20 46 25.5382179476 +40 06 59.396202678   18.64 16.60     M7/8 481 0
47 NGC 7419 OpC 22 54 20 +60 48.9     13.0     ~ 84 0

    Equat.    Gal    SGal    Ecl

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2020.04.09-20:21:14

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