an intensive study of the iras photometry of a wide sample of pne and ppne has shown that a clear correlation exists between the iras colors and the mass and age of pne and ppne. however, this correlation is affected in many cases by the presence of strong emission lines and a detailed analysis of the far infrared energy distribution is needed to model their evolutionary tracks through the iras two-color diagram. we propose to obtain full range spectra (sws and lws) of a well defined sample of pne and ppne in order to determine the contribution of these emission lines to the original iras fluxes. the analysis of the emission lines will be used to derive the chemical abundances and physical conditions of those pne showing strong features, while the underlying continuum, basically due to dust emission, will be used to reconstruct their mass loss history and study the properties of the dust as a function of the position of the source in the iras two-color diagram, the mass of the progenitor star and evolutionary stage.
Instrument
LWS01 , SWS01
Temporal Coverage
1997-01-03T14:55:27Z/1997-04-03T12:24:41Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's 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, 1999, Correlation Of Mass And Age With The Far-Ir Colors Of Pne And Ppne, 1.0, European Space Agency, https://doi.org/10.5270/esa-15qf3u0
