Ultra-Hot Nuclei and Their Surrounding Planetary Nebulae

Details Ultra-Hot Nuclei and Their Surrounding Planetary Nebulae Ultra-Hot Nuclei and Their Surrounding Planetary Nebulae

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8078b&link_type=abstract

HST Proposal ID #8078

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Hst Proposal Id #8078

Scientific paper

UV and optical spectra of hot pre-white dwarfs and white dwarfs, often in planetary nebulae, show emission from ios charactrizing tempeartures far above that of the photosphere. This includes emission from O VII and O VIII, as well as other species. The unusually high ionization emission features suggest a chromosheric-like region around these objects. We will use the spectral and imaging capabilities of STIS to observe these objects with the goals of a.} determining what high ionization features are present, b.}map the extended nebular emission, and c.} derive ionization structure at larger distances.

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