Editing Pulsar wind nebula (section)

==Evolution of pulsar wind nebulae==

Pulsar wind nebulae evolve through various phases.<ref name="SafiHarb2012" /><ref name="Slane2000" /> New pulsar wind nebulae appear soon after a pulsar's creation, and typically sit inside a [[supernova remnant]], for example the [[Crab Nebula]],<ref name="Hester2008">{{cite journal |title=The Crab Nebula: An Astrophysical Chimera |journal=Annual Review of Astronomy & Astrophysics |first=J. Jeff |last=Hester |volume=46 |issue=1 |pages=127–155 |date=September 2008 |doi=10.1146/annurev.astro.45.051806.110608 |bibcode=2008ARA&A..46..127H}}</ref> or the nebula within the large [[Vela Supernova Remnant]].<ref name="Weiler1980">{{Cite journal |title=Vela X and the Evolution of Plerions |journal=[[Astronomy and Astrophysics]] |last1=Weiler |first1=K. W. |last2=Panagia |first2=N. |volume=90 |issue=3 |pages=269–282 |date=October 1980 |bibcode=1980A&A....90..269W}}</ref> As the pulsar wind nebula ages, the supernova remnant dissipates and disappears. Over time, pulsar wind nebulae may become [[Bow shock|bow-shock]] nebulae surrounding millisecond or slowly rotating pulsars.<ref name="Stappers2003">{{cite journal |title=An X-ray nebula associated with the millisecond pulsar B1957+20 |journal=Science |last1=Stappers |first1=B. W. |last2=Gaensler |first2=B. M. |last3=Kaspi |first3=V. M. |last4=van der Klis |first4=M. |last5=Lewin |first5=W. H. G. |display-authors=3 |volume=299 |issue=5611 |pages=1372–1374 |date=February 2003 |doi=10.1126/science.1079841 |arxiv=astro-ph/0302588 |bibcode=2003Sci...299.1372S |pmid=12610299|s2cid=19659750 }}</ref>