Physical Parameters of the Erupting Luminous Blue Variable NGC 2363-V1

Details Physical Parameters of the Erupting Luminous Blue Variable NGC 2363-V1 Physical Parameters of the Erupting Luminous Blue Variable NGC 2363-V1

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9966d&link_type=abstract

HST Proposal ID #9966

Physics

Hst Proposal Id #9966 Hot Stars

Scientific paper

In 1996, we reported the discovery of a bright variable star in the giant extragalactic H , ii region NGC 2363. Subsequent photometry and high quality HST/STIS spectroscopy of this star, NGC 2363-V1, revealed that we are witnessing a significant event in the evolution of a massive star, namely a major eruption of a Luminous Blue Variable {LBV}. A quantitative analysis of the STIS datasets gathered in 1997 and 1999 allowed us to determine the luminosity, mass loss rate, wind terminal velocity, surface temperature and even Fe content of this erupting LBV. Because such events are rare, continuous monitoring of the physical parameters of NGC 2363- V1 over the course of its present eruption will provide an invaluable set of constraints for theoretical models. We therefore propose to obtain high quality STIS spectra of this star once a year for the next three observing Cycles.

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