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Resolution and evolution of the core of the giant HII region NGC 3603

Published online by Cambridge University Press:  07 August 2017

K.-H. Hofmann ,
G. Weigelt  and
W. Seggewiss
K.-H. Hofmann
Affiliation:
MPI für Radioastronomie, Bonn, Germany
G. Weigelt
Affiliation:
MPI für Radioastronomie, Bonn, Germany
W. Seggewiss
Affiliation:
Observatorium Hoher List, Daun, Germany

Abstract

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We present diffraction-limited speckle-masking observations of the central object HD 97950 in the giant HII region and star cluster NGC 3603. Twenty-eight stellar components have been detected in the 6.″3 x 6.″3 field from our reconstructed images. Four different filter combinations were used for the selection of distinct spectral regions comprising Hα emission, the main Wolf-Rayet and Of-type emission lines, and two continuum bands. Stellar components having WN-type characteristics have been found. A color-magnitude diagram has been constructed. Isochrone fits yield a cluster age of about 3.2 Myr, which is in accordance with the time-scale of Wolf-Rayet star evolution.

Keywords

HII region NGC 3603stellar core HD 97950speckle interferometryresolutioncluster evolution
Type
Session I - Basic parameters, properties of single Wolf-Ray et stars
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 43 - 47
Copyright
Copyright © Kluwer 1995 

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