The complete ISO spectrum of NGC 6302
Waters, L. B. F. M.; Beintema, D. A.; Barlow, M. J.; Cohen, M.; Cox, P.; Schmitt, B.; Lim, T. L.; Molster, F. J.; Sylvester, R. J.
Netherlands, United States, United Kingdom, Belgium, France
Abstract
We present the combined Infrared Space Observatory Short-Wavelength Spectrometer and Long-Wavelength Spectrometer 2.4-197 mu m spectrum of the Planetary Nebula NGC 6302 which contains in addition to strong atomic lines, a series of emission features due to solid state components. The broad wavelength coverage enables us to more accurately identify and determine the properties of both oxygen- and carbon-rich circumstellar dust. A simple model fit was made to determine the abundance and typical temperature of the amorphous silicates, enstatite and forsterite. Forsterite and enstatite do have roughly the same abundance and temperature. The origin and location of the dust in a toroidal disk around the central star are discussed. Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, The Netherlands and the UK) and with the participation of ISAS and NASA.