HST/FOS Spatially Resolved Spectral Classification of Compact OB Groups in the Large Magellanic Cloud

Details HST/FOS Spatially Resolved Spectral Classification of Compact OB Groups in the Large Magellanic Cloud HST/FOS Spatially Resolved Spectral Classification of Compact OB Groups in the Large Magellanic Cloud

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aj....118.1684w&link_type=abstract

The Astronomical Journal, Volume 118, Issue 4, pp. 1684-1699.

Astronomy and Astrophysics

Astronomy

45

Stars: Binaries: Close, Galaxies: Magellanic Clouds, Galaxy: Open Clusters And Associations: General, Stars: Early-Type, Stars: Fundamental Parameters, Stars: Wolf-Rayet

Scientific paper

Blue-violet spectrograms of individual components in four compact OB groups of the Large Magellanic Cloud, obtained with the Hubble Space Telescope (HST) Faint Object Spectrograph (FOS), are presented and discussed. Two of the massive multiple systems are in the 30 Doradus periphery, while the other two represent the core and the peripheral, triggered associations in the giant shell H II region Henize N11. Uncontaminated spectrograms of three Wolf-Rayet and two very early Of components have been obtained for the first time; they can be observed only as composites with their close companions from the ground. Many of the companions have also been observed separately with the HST FOS, and several are of special interest in their own right. These observations provide information on the initial masses and ages of the peculiar objects, and on the evolutionary relationships among different spectral categories within the presumably coeval systems.

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