Editing Quark star (section)

==History==
The analysis about quark stars was first proposed in 1965 by Soviet physicists [[Dmitri Ivanenko|D. D. Ivanenko]] and [[D. F. Kurdgelaidze]].<ref>{{cite journal |title=Hypothesis concerning quark stars |last1=Ivanenko |first1=Dmitri D. |last2=Kurdgelaidze |first2=D. F. |journal=Astrophysics |volume=1 |issue=4 |pages=251–252 |date=1965 |bibcode=1965Ap......1..251I |doi=10.1007/BF01042830 |s2cid=119657479 }}</ref><ref>{{cite journal |title=Remarks on quark stars |last1=Ivanenko |first1=Dmitri D. |last2=Kurdgelaidze |first2=D. F. |journal=Lettere al Nuovo Cimento |volume=2 |pages=13–16 |date=1969 |bibcode=1969NCimL...2...13I |doi=10.1007/BF02753988|s2cid=120712416 }}</ref> Their existence has not been confirmed.

The [[equation of state]] of [[quark matter]] is uncertain, as is the transition point between neutron-degenerate matter and quark matter.<ref>{{Cite journal |last=Mishra |first=H. |last2=Misra |first2=S.P. |last3=Panda |first3=P.K. |last4=Parida |first4=B.K. |date=1993 |title=NEUTRON MATTER – QUARK MATTER PHASE TRANSITION AND QUARK STAR |url=https://www.worldscientific.com/doi/abs/10.1142/S0218301393000212 |journal=International Journal of Modern Physics E |language=en |volume=02 |issue=03 |pages=547–563 |doi=10.1142/S0218301393000212 |issn=0218-3013|arxiv=nucl-th/9301003 }}</ref> Theoretical uncertainties have precluded making predictions from [[first principles]]. Experimentally, the behaviour of quark matter is being actively studied with particle colliders, but this can only produce very hot (above 10<sup>12</sup>&nbsp;[[Kelvin (unit)|K]]) [[quark–gluon plasma]] blobs the size of atomic nuclei, which decay immediately after formation. The conditions inside compact stars with extremely high densities and temperatures well below 10<sup>12</sup>&nbsp;[[Kelvin (unit)|K]] cannot be recreated artificially, as there are no known methods to produce, store or study "cold" quark matter directly as it would be found inside quark stars. The theory predicts quark matter to possess some peculiar characteristics under these conditions.{{citation needed|date=March 2024}}