2002A&A...382..537N


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET12:16:59

2002A&A...382..537N - Astronomy and Astrophysics, volume 382, 537-553 (2002/2-1)

Infrared observations of NGC 3603. I. New constraints on cluster radius and Ks-band luminosity function.

NUERNBERGER D.E.A. and PETR-GOTZENS M.G.

Abstract (from CDS):

We have performed deep Ks-band observations of the starburst region NGC 3603 with the infrared camera ISAAC mounted on the VLT Antu. The total area covered by our data stretches from the NGC 3603 starburst cluster towards the south up to a maximal distance of about 370'' (∼12pc). This enables us to reconsider and redetermine the radial extent of the cluster which is found to be about 150''±15'' (∼5pc), exceeding previous estimates by a factor of 2.5. King model fits are used to disentangle the count statistics of cluster stars from those of field stars. With knowledge of th.e cluster radius we then construct and analyze the Ks-band luminosity function (KLF) of the NGC 3603 starburst cluster. The KLF for cluster radii >30'' is rising down to the completeness limit of our study at Ks∼17m-17.5m, corresponding to 1Myr old cluster members of M∼0.5M. For the range of intermediate luminosity stars we obtain a KLF slope of α=0.35±0.02 which is consistent with a Miller-Scalo type initial mass function (IMF) of a ∼1Myr old stellar cluster if one assumes a power-law index of β∼2 for the mass-luminosity relation of both intermediate mass main sequence stars and low mass pre-main sequence stars. At the high luminosity end the observed KLF likely flattens (α∼0.2), being consistent with a Salpeter type IMF for NGC 3603's massive main sequence stars.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - stars: luminosity function, mass function - HII regions - ISM: individual objects: NGC 3603 - galaxies: starbursts

Simbad objects: 13

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Number of rows : 13

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 LMC G 05 23 34.6 -69 45 22     0.4     ~ 14380 1
2 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1912 1
3 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1025 2
4 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1680 2
5 NAME Car Arm PoG 10 00 -60.0           ~ 367 1
6 EGGR 70 WD* 10 33 42.7629684770 -11 41 38.339441758 11.851 12.847 13.012 13.138 13.278 DA1.9 103 0
7 HD 97950 Cl* 11 15 07.346 -61 15 38.52 9.64 9.83 9.03 9.69   WR 181 2
8 Cl* NGC 3603 MTT 122 * 11 15 09.45 -61 16 41.4           ~ 19 0
9 NGC 3603 HII 11 15 24 -61 15.0           ~ 923 2
10 GSPC S 64-F * 12 03 30.2 -69 04 57           ~ 6 0
11 GSPC S791-C * 13 17 29.6 -05 32 37           ~ 13 0
12 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11082 0
13 GSPC S279-F * 17 48 22.7 -45 25 45           ~ 29 0

    Equat.    Gal    SGal    Ecl

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2019.12.10-12:16:59

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