i propose to study the far infrared spectrum of a number of bright planetary nebulae in the lmc. sws will be used to measure line fluxes of several emission lines. the continuum underneath the line will be determined with phot-s. the data will be used to determine improved abundances for especially neon, which is an important tracer for stellar dredge up. models for the nebulae will be constructed to reproduce both the observed optical and ir spectra and the dust spectral energy distribution. i will test why lmc pn appear to have hotter dust than galactic pn. for one object, which in the past few years has suffered a helium flash, dust formation in the hydrogen-poor wind will be studied. this object gives a unique opportunity to study the effect of a rare late helium flash, as it is only the second time such a flash has occured in an observable star this century.
Instrument
PHT03 , PHT40 , SWS02
Temporal Coverage
1996-05-25T03:05:03Z/1997-12-07T06:08:18Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, ZIJLSTRA et al., 1999, 'SPECTROSCOPY OF PLANETARY NEBULAE IN THE LMC', 1.0, European Space Agency, https://doi.org/10.5270/esa-0n22g8m
