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Planetary Nebulae in the MW, LMC, SMC: Results from FUSE and HST dataWe use FUSE and HST data to study Planetary Nebulae (PN) systems in the Milky Way, LMC and SMC. Theoretically, metallicity affects several aspects of the post-AGB evolution, including mass-loss and the yield of processed material, which are important factors in the chemical evolution of galaxies. Therefore, it is very important to study PNe in different environments. In Bianchi's FUSE programs, we observed CSPN in the Milky Way (Cycle 1), LMC (Cycle 2) and SMC (Cyde 3), representing a range of metallicities from solar to 1/10th solar. The far-UV range reveals the spectrum of the central star (CSPN), uniquely enabling a direct estimate of the ionizing source parameters. Combined with archive HST data, these spectra provide a measurement of T(sub eff), log g, L(sub bol), abundances, wind velocity and mass-loss rate for these post-AGB stars. Additionally, these spectra provide a measurement of the circumstellar H2 and HI, which added to the mass of the central star and of the ionized shell allows us to test theoretical initial-final mass relations, and to put together a complete picture of the star's evolution.
Document ID
20040075029
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Herald, J. E.
(Johns Hopkins Univ. Baltimore, MD, United States)
Bianchi, L.
(Johns Hopkins Univ. Baltimore, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NRA-99-01-LTSA-029
CONTRACT_GRANT: NAS5-26555
CONTRACT_GRANT: NAG5-12294
CONTRACT_GRANT: NAS5-32985
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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