- References
- External links
In astronomy, the Ostriker–Peebles criterion, named after its discoverers Jeremiah Ostriker and Jim Peebles, describes the formation of barred galaxies.[1]
The rotating disc of a spiral galaxy, consisting of stars and solar systems, may become unstable in a way that the stars in the outer parts of the "arms" are released from the galaxy system, resulting in the collapse of the remaining stars into a bar-shaped galaxy. This occurs in approximately 1/3 of the known spiral galaxies.
Based on the first kinetic energy component T and the total gravitational energy W, a galaxy will become barred when 
.[1]
References
1. ^1 {{cite web |url=https://books.google.com.au/books?id=01yNf7mipb0C&lpg=PA374&ots=p8wf-UJBte&dq=Ostriker-Peebles%20criterion&pg=PA374#v=onepage&q=Ostriker-Peebles%20criterion&f=false |title=Galactic Dynamics |publisher=Princeton University Press |access-date=2 September 2016 |date=1987 |first1=James |last1=Binney |first2=Scott |last2=Tremaine}}
External links
- About barred galaxies
1 : Extragalactic astronomy
- Edward Cussler
- Edward Cutbush
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- Edward C. Wickham
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- Edward C. Williams
- Edward C. “Shy” Meyer
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