Other
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10400c&link_type=abstract
HST Proposal ID #10400
Other
Hst Proposal Id #10400 Hot Stars
Scientific paper
Based on cycle 10 STIS UV spectroscopy, we have recently discovered a star cluster, NGC 3125-1, which has the strongest known He II 1640 emission {of stellar origin} in the local universe. The number of implied WR stars is more than an order of magnitude higher than for any other well-studied giant HII region. Because strong He II 1640 emission has been discovered in the composite spectra of redshift 3 Lyman Break Galaxies, NGC 3125-1 potentially provides a unique opportunity to study a nearby object with direct implications for the stellar populations observed in the early universe. In order to understand the origin of this anomalously strong WR feature, we propose to obtain the first high resolution imaging of NGC 3125-1, at wavelengths from the far ultraviolet through the near infrared. This will allow us to simultaneously place it in the context of more familiar objects, such as R136 in 30 Doradus, while also unravelling the physics responsible for the observed UV spectral signature.
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