Editing Star system (section)

===Trapezia===

Trapezia are usually very young, unstable systems. These are thought to form in stellar nurseries, and quickly fragment into stable multiple stars, which in the process may eject components as galactic [[runaway stars|high-velocity stars]].<ref name=heintztrapezia>{{cite book | last=Heintz | first=W. D. | date=1978 | title=Double Stars | publisher=D. Reidel Publishing Company, Dordrecht | isbn=90-277-0885-1 | pages=[https://archive.org/details/DoubleStars/page/67 67–68] | url=https://archive.org/details/DoubleStars/page/67 }}</ref><ref>{{cite journal |bibcode=2006RMxAC..25...13A |title=Runaway Stars, Trapezia, and Subtrapezia |last1=Allen |first1=C.|author1-link=Christine Allen (astronomer) |last2=Poveda |first2=A. |last3=Hernández-Alcántara |first3=A. |journal=Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias |year=2006 |volume=25 |page=13 }}</ref> They are named after the multiple star system known as the [[Trapezium Cluster]] in the heart of the [[Orion Nebula]].<ref name=heintztrapezia /> Such systems are not rare, and commonly appear close to or within bright [[nebula]]e. These stars have no standard hierarchical arrangements, but compete for stable orbits. This relationship is called ''interplay''.<ref name="Heintz 1978 68">{{cite book | last=Heintz | first=W. D. | date=1978 | page=[https://archive.org/details/DoubleStars/page/68 68] | title=Double Stars | publisher=D. Reidel Publishing Company, Dordrecht | isbn=90-277-0885-1 | url=https://archive.org/details/DoubleStars/page/68 }}</ref> Such stars eventually settle down to a close binary with a distant companion, with the other star(s) previously in the system ejected into interstellar space at high velocities.<ref name="Heintz 1978 68" /> This dynamic may explain the [[runaway star]]s that might have been ejected during a collision of two binary star groups or a multiple system. This event is credited with ejecting [[AE Aurigae]], [[Mu Columbae]] and [[53 Arietis]] at above 200&nbsp;km·s<sup>−1</sup> and has been traced to the [[Trapezium cluster]] in the [[Orion Nebula]] some two million years ago.<ref name="Blaauw">
{{cite journal
 |last=Blaauw | first=A.
 |author2=Morgan, W.W.
 |date=1954
 |title=The Space Motions of AE Aurigae and mu Columbae with Respect to the Orion Nebula
 |journal=Astrophysical Journal
 |volume=119
 |pages=625
 |doi=10.1086/145866
 |bibcode=1954ApJ...119..625B
|doi-access=free
 }}</ref><ref name="Hoogerwerf">
{{cite journal
 |last1=Hoogerwerf |first1=R.
 |last2=de Bruijne |first2=J.H.J.
 |last3=de Zeeuw |first3=P.T
 |date=2000
 |title=The origin of runaway stars
 |journal=Astrophysical Journal
 |volume=544
 |issue=2
 |pages=133–136
 |doi=10.1086/317315
 |bibcode=2000ApJ...544L.133H
 |arxiv = astro-ph/0007436
|s2cid=6725343
 }}</ref>