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On the Nature of R 136, the Central Object of 30 Dor. A Comparison by the Galactic Cluster NGC 3603

Published online by Cambridge University Press:  04 August 2017

Michael Rosa ,
Jorge Melnick  and
Preben Grosbol
Michael Rosa
Affiliation:
European Southern Observatory, Garching/Munich, FRG
Jorge Melnick
Affiliation:
European Southern Observatory, Garching/Munich, FRG Universidad de Chile, Santiago, Chile
Preben Grosbol
Affiliation:
European Southern Observatory, Garching/Munich, FRG

Abstract

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The massive H II region NGC 3603 is the closest galactic counterpart to the giant LMC nebula 30 Dor. Walborn (1973) first compared the ionizing OB/WR clusters of the two H II regions and suggested that R 136, the unresolved luminous WR + 0 type central object of 30 Dor, might be a multiple system like the core region of NGC 3603. Suggestions that the dominant component of R 136, i.e. R 136A, might be either a single or a very few supermassive and superluminous stars (Schmidt-Kaler and Feitzinger 1982, Savage et al. 1983) have recently been disputed by Moffat and Seggewiss (1983) and Melnick (1983), who have presented spectroscopic and photometric evidence to support the hypothesis of an unresolved cluster of stars. We have extended Walborn's original comparison of the apparent morphology of the two clusters by digital treatment of the images to simulate how the galactic cluster would look like if it were located in the LMC

Type
30 Doradus and R136
Information
Symposium - International Astronomical Union , Volume 108: Structure and Evolution of the Magellanic Clouds , 1984 , pp. 257 - 258
Copyright
Copyright © Reidel 1984 

References

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