Misplaced Pages

This is an old revision of this page, as edited by 217.17.137.178 (talk) at 22:21, 28 January 2016 (they are not red in colour; they do not "bolt out"; the word "horizontal" has no meaning in this context). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Fast Low-Ionization Emission Region" – news · newspapers · books · scholar · JSTOR (January 2007) (Learn how and when to remove this message)

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 nebulae. 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.

A picture of the Blinking Planetary nebula was taken by the Hubble on 27 January 1996, and the estimated distance from the telescope to the nebula is about 0.7 kiloparsecs or 2,200 light-years. Previously, nebulae and their FLIERs could be seen from ground-based telescopes with limited clarity. The Hubble Space Telescope's Blinking Planetary image credit goes to astronomers Bruce Balick of the University of Washington; Jason Alexander, University of Washington; Arsen Hajian, U.S. Naval Observatory, Washington, D.C.; Mario Perinotto, University of Florence (Italy); Patrizio Patriarchi, Arcetri Observatory (Italy); and Cornell's Terzian, who used a special instrument with the Hubble Telescope known as WFPC2 (pronounced "wiffpick two"). Object NGC 7009, which also shows very prominent FLIERs, nicknamed the Saturn Nebula, was observed by the Hubble Space Telescope on 28 April 1996, and is one of the images released. Astronomers believe the distance from here to the Saturn Nebula is 0.42 kiloparsecs or 1,400 light-years.

References

1. Terzian, Yervant"Clearest Images of Mysterious Cosmic Spouts (FLIERS). [Web links]". myeducationresearch.org, The Pierian Press, 17 Dec 1997. Online. Internet. 18 May 1743. Retrieved 30 Nov 2010.

Stub

No current model of stellar or nebular evolution explains FLIERs.

This nebula-related article is a stub. You can help Misplaced Pages by expanding it.

• v
• t
• e

• Planetary nebulae
• Nebula stubs