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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 

References

Baier, G., Ladebeck, R., Weigelt, G. 1985, A&A 151, 61 Google Scholar
Hofmann, K.-H., Weigelt, G. 1986, A&A 167, L15 Google Scholar
Lohmann, A.W., Weigelt, G., Wirnitzer, B. 1983, Appl. Opt. 22, 4028 Google Scholar
Melnick, J., Tapia, M., Terlevich, R. 1989, A&A 213, 89 Google Scholar
Meynet, G., Mermilliod, J.-C., Maeder, A. 1993, A&A Suppl. 98, 477 Google Scholar
Moffat, A.F.J. 1983, A&A 124, 273 Google Scholar
Moffat, A.F.J., Drissen, L., Shara, M.M. 1994, ApJ in press Google Scholar
Moffat, A.F.J., Seggewiss, W., Shara, M.M. 1985, ApJ 295, 109 Google Scholar
Pehlemann, E., Hofmann, K.-H., Weigelt, G. 1992, A&A 256, 701 Google Scholar
Schaller, G., Schaerer, D., Meynet, G., Maeder, A. 1992, A&A Suppl 96, 269 Google Scholar
Sher, D. 1965, MNRAS 129, 237 Google Scholar
van den Bergh, S. 1978, A&A 63, 275 Google Scholar
van den Bos, W.H. 1928, Bull. Astron. Inst. Neth. 4, 261 Google Scholar
Walborn, N.R. 1973, ApJ 182, L21 CrossRefGoogle Scholar
Weigelt, G.P. 1977, Opt. Commun. 21 55 Google Scholar