@inproceedings{1b1dec4f08754630a3e35a1e33682c3e,
title = "A study of the effect of ionization and illumination on morphologies of planetary nebulae",
abstract = "We carry out a modelling study of the effect of ionization and illumination on the morphologies of planetary nebulae (PNs), aiming to investigate the hypothesis of Kwok (2010) that the bipolar and multipolar lobes of PNs can be produced by leakage of UV photons into those directions. Using photoinization code, we construct a series of nebular models consisting of a dense envelope and cones of low density. The results show that the visible morphologies of PNs may be fundamentally different from their intrinsic structures.",
keywords = "circumstellar matter, planetary nebulae: general",
author = "Yong Zhang and Sun Kwok and Ko, {Chung Ming}",
note = "Funding Information: The work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7031/10P) and a grant to YZ from the Seed Funding Programme for Basic Research in HKU (200909159007). CMK is supported in part by the National Science Council, Taiwan, under grants NSC 98-2923-M-008-001-MY3 and NSC 99-2112-M-008-015-MY3.",
year = "2011",
month = jul,
doi = "10.1017/S1743921312012276",
language = "???core.languages.en_GB???",
isbn = "9781107019836",
series = "Proceedings of the International Astronomical Union",
number = "S283",
pages = "530--531",
editor = "Arturo Manchado and Letizia Stanghellini and Detlef Schonberner",
booktitle = "Planetary Nebulae",
edition = "S283",
}