Evolution of Planetary Nebulae in the Mid-Infrared

Details Evolution of Planetary Nebulae in the Mid-Infrared Evolution of Planetary Nebulae in the Mid-Infrared

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..378..329o&link_type=abstract

Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes. ASP Conference Series, Vol. 378, proceedings of the co

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Scientific paper

The evolution of planetary nebulae is studied using MSX data on a sample of 214 objects situated near the galactic plane. The observed MSX magnitudes are compared with synthetic magnitudes obtained by convolving synthetic spectra generated by CLOUDY with MSX filter curves. Color-color diagrams show that the evolutionary tracks are similar as the star begins its post--AGB phase. Young PNe can be identified using the [14.7]-[21.3] color index, because of the significant contribution of dust to the continuum at this phase. On the other hand, dust-poor nebulae are also located in a characteristic region of the ([14.7]-[21.3]) × ([8.3]-[14.7]) diagram. There is also some segregation with respect to the mass of the central star in this diagram that might help the diagnosis of objects severely affected by extinction.

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