A self-consistent model for 22 GHz water maser in dusty medium: Orion KL nebula and AGN NGC 4258.,
Szczerba R.; Siódmiak, N.; Szyszka, C.
2005, In: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Proceedings, Edited by R. Szczerba, G. Stasinska, and S. K. Gorny., Volume 804, pp. 214-217
Abstract:
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With the aim to investigate the overall evolution of UIR band features with hardening of UV radiation (increase of the star's effective temperature) we have analysed ISO spectra for 32 C-rich stars: 20 proto-planetary nebulae and 12 planetary nebulae with Wolf-Rayet central stars. In this contribution we discuss variations in the peak position of UIR bands among analysed objects, and demonstrate that variations in the ``7.7'' to 11.3 $B&L(Bm flux ratio are correlated with the effective temperature (probably due to an increase of the ionization state of their carriers).
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Szczerba_etal_05.pdf
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