Dust Extinction in Compact Planetary Nebulae

Details Dust Extinction in Compact Planetary Nebulae Dust Extinction in Compact Planetary Nebulae

2005-06-21

arxiv.org/abs/astro-ph/0506513v1

Astrophys.J.632:340-354,2005

Astronomy and Astrophysics

Astrophysics

39 pages, including 21 figure pages and 1 table page; accepted for publication in the Astrophysical Journal; figure quality re

Scientific paper

10.1086/432875

The effects of dust extinction on the departure from axi-symmetry in the morphology of planetary nebulae (PNs) are investigated through a comparison of the radio free-free emission and hydrogen recombination line images. The dust exctinction maps of five compact PNs are derived using high-resolution (~ 0".1) H-alpha and radio images maps of the HST and VLA. These extinction maps are then analyzed by an ellipsoidal shell ionization model including the effects of dust extinction to infer the nebulae's intrinsic structure and orientation in the sky. This method provides a quantitative analysis of the morphological structure of PNs and represents a step beyond qualitative classification of morphological types of PNs.

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