Sub-Arcsecond Morphology of Planetary Nebulae

Publications of the Astronomical Society of Australia

L. F. Miranda¹ 

[1] G. Ramos-Larios

关键词: circumstellar matter;    ISM: jets and outflows;    planetary nebulae;   

DOI  :  10.1071/AS09028

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

Planetary nebulae (PNe) can be roughly categorized into several broad morphological classes. The high quality images of PNe acquired in recent years, however, have revealed a wealth of fine structures that preclude simplistic models for their formation. Here we present narrow-band, sub-arcsecond images of a sample of relatively large PNe that illustrate the complexity and variety of small-scale structures. This is especially true for bipolar PNe, for which the images reveal multi-polar ejections and, in some cases, suggest turbulent gas motions. Our images also reveal the presence or signs of jet-like outflows in several objects in which this kind of component has not been previously reported.

【 授权许可】

Unknown