Other
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8271s&link_type=abstract
HST Proposal ID #8271
Other
Hst Proposal Id #8271 Stellar Ejecta
Scientific paper
We propose a survey of LMC planetary nebulae {PNe} to study the parallel evolution of the nebulae and their central stars. We will obtain STIS imaging and medium-resolution slitless spectroscopy which will yield line fluxes and nebular morphologies in 7 emission lines {H-alpha, H-beta, He I Ang, [N II], [O I], [O III], and [S II]}, plus magnitudes of the central stars. We can gather this data very efficiently in a SNAPSHOT survey, and from it we will gather a harvest of information: the nebular size, morphology, ionization structure, density, and mass; and the central star temperature and luminosity {and therefore its evolutionary state and mass}. We will test the correlation of nebular bipolarity with large progenitor star mass, and correlate PN morphology and central star evolution in a unique sample of PNe that is free of distance and other biases. We will compare all the observed and derived nebular and stellar properties to the environmental stellar mass function to es timate the progenitor mass. %and t he physical environment in the LMC. The HST Data Archive has been fully explored to demonstrate the importance of acquiring new data and the feasibility of the program. This study will be the most comprehensive of its kind, and will be unique in the insight it will offer into the combined evolution of PNe and their central stars. Because we expect these data to be of fundamental importance to PN studies, we wave 9 months of our proprietary period to expedite follow-up research.
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