Editing Neutron star (section)

===Temperature===

The temperature inside a newly formed neutron star is from around {{val|e=11}} to {{val|e=12|ul=kelvin}}.<ref name="Miller" /> However, the huge number of [[neutrino]]s it emits carries away so much energy that the temperature of an isolated neutron star falls within a few years to around {{val|e=6|u=kelvin}}.<ref name="Miller" /> At this lower temperature, most of the light generated by a neutron star is in X-rays.

Some researchers have proposed a neutron star classification system using [[Roman numerals]] (not to be confused with the [[Stellar classification|Yerkes luminosity classes]] for non-degenerate stars) to sort neutron stars by their mass and cooling rates: type I for neutron stars with low mass and cooling rates, type II for neutron stars with higher mass and cooling rates, and a proposed type III for neutron stars with even higher mass, approaching {{solar mass|2}}, and with higher cooling rates and possibly candidates for [[exotic star]]s.<ref>{{Cite journal |last1=Yakovlev |first1=D. G. |last2=Kaminker |first2=A. D. |last3=Haensel |first3=P. |last4=Gnedin |first4=O. Y. |year=2002 |title=The cooling neutron star in 3C 58 |journal=Astronomy & Astrophysics |volume=389 |pages=L24–L27 |arxiv=astro-ph/0204233 |bibcode=2002A&A...389L..24Y |doi=10.1051/0004-6361:20020699 |s2cid=6247160}}</ref>