View source for Fast Low-Ionization Emission Region

{{More citations needed|date=January 2007}}

A '''Fast Low-Ionization Emission Region''', or '''FLIER''', is a volume of [[gas]] with low [[ionization]], moving at [[supersonic]] speeds, near the symmetry axis of many [[planetary nebula]]e. Their outflow speeds are significantly higher than the [[nebulae]] in which they are embedded, and their ionizations are much lower. FLIERs' high speeds suggest ages much younger than their parent nebulae, and their low ionizations indicate that the [[ultraviolet radiation]] that ionizes the gas around them does not penetrate into the FLIERs. The [[Blinking Planetary]] features a set of FLIERs.<ref>Terzian, Yervant{{cite web |url=http://myeducationresearch.org/databases/cgi-bin/kwq.asp?qu=@recnumber%20FBA20098067&FreeText=&sc=%2Fpierianp%2Ffba%2F |title=Clearest Images of Mysterious Cosmic Spouts (FLIERS). [Web links] |date=18 May 1743 |work=myeducationresearch.org, The Pierian Press, 17 Dec 1997. Online. Internet. |access-date=30 Nov 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110727104846/http://myeducationresearch.org/databases/cgi-bin/kwq.asp?qu=%40recnumber%20FBA20098067&FreeText=&sc=%2Fpierianp%2Ffba%2F |archive-date=2011-07-27 |df= }}</ref>

==References==
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[[Category:Planetary nebulae]]