# 2006A&A...459..769V

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 Query : 2006A&A...459..769V

2006A&A...459..769V - Astronomy and Astrophysics, volume 459, 769-775 (2006/12-1)

High resolution spectroscopy of giant HII regions around young massive clusters.

VANZI L., SCATARZI A., MAIOLINO R. and STERZIK M.

Abstract (from CDS):

We present new high-resolution optical spectroscopy of giant HII regions around three young massive clusters located in the blue dwarf galaxies NGC 5253 and He 2-10. We used the observations to derive the mass of the clusters under the hypothesis of virialization. The virial masses exceed the optical ones. In one case, however, the virial mass is consistent with that derived from the IR luminosity, pointing to the presence of a hidden stellar population. The dynamics inferred from the emission lines indicates that the clusters may indeed be virialized or close to virialization. We detect an indication of mass segregation in two clusters. At least in one case, we find that such mass segregation must have a primordial'' nature, rather than dynamical, i.e. associated with the formation mechanism of the cluster. We could resolve two of the clusters with the spectro-astrometric technique detecting in both cases evidence of structures on the pc scale.

Journal keyword(s): galaxies: dwarf - galaxies: individual: NGC 5253 - galaxies: individual: He 2-10 - galaxies: star clusters

Full paper

 Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SBSG 0335-052 bCG 03 37 44.04 -05 02 38.5     16.65     ~ 455 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16525 1
3 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1908 1
4 ESO 495-21 bCG 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 541 3
5 [CKV93] A PoG 08 36 15.22 -26 24 34.3   11.59 11.79     ~ 15 0
6 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 291 0
7 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5681 6
8 [DAZ2013] 129 Cl* 13 39 55.98 -31 38 31.9           ~ 22 0
9 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1327 4
10 NAME NGC 5353 Radio Supernebula Cl* 13 39 56.007 -31 38 25.00           ~ 48 0
11 [HCG2004] NGC 5253 C 4 H2G 13 39 56.020 -31 38 27.89           ~ 32 0

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2023.02.04-09:12:13