Physics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ign..confe..18d&link_type=abstract
Ionized Gaseous Nebulae. Mexico City November 21- 24, 2000, meeting abstract
Physics
Scientific paper
I will review new revelations about the morphology and physical conditions i n a variety of Wolf-Rayet (NGC 6888 & NGC 2359), Of (NGC 7635), and LBV (Eta Carinae ejecta) nebulae from recent ground-based and Hubble Space Telescope imagery and spectroscopy observations. Topics discussed include (a) abundance anomalies in the ejecta, (b) extraordinary temperature variations found due to strong WR/O star winds and/or high velocity ejected material, (c) density inhomogeneities and instabilities in the ejecta due to winds, motion, and photoevaporation, and (d) the impact of these extraordinary structures and variations in physical conditions on current problems in photoionized nebulae such as the relatively more quiescent H II regions and planetary nebulae. Finally, I hope to present new HST WFPC2 imagery and UV-optical STIS spectra of the prototypical WR shell nebula, NGC 6888, currently planned to be taken in 2000 September which are expected to provide new nebular diagnostics of the He/N-rich ejecta and 50,000 K wind-driven gas at 0.1 arc sec resolution.
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