Quark Star Candidate?

[michaelmozina]

<p>http://www.newscientist.com/article/mg20126964.700-quark-star-may-hold-secret-to-early-universe.html</p><p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Now Kwong-Sang Cheng of the University of Hong Kong, China, and colleagues have presented evidence that a quark star formed in a bright supernova called SN 1987A<img class="artxicon" src="http://www.newscientist.com/img/icon/artx_video.gif" alt="Movie Camera" title="Contains video content" /> (pictured), which is among the nearest supernovae to have been observed.</p> <p>The birth of a neutron star is known to be accompanied by a single burst of neutrinos. But when the team examined data from two neutrino detectors - Kamiokande II in Japan and Irvine-Michigan-Brookhaven in the US - they found that SN 1987A gave off two separate bursts. "There is a significant time delay between [the bursts recorded by] these two detectors," says Cheng. They believe the first burst was released when a neutron star formed, while the second was triggered seconds later by its collapse into a quark star. The results will appear in <em>The Astrophysical Journal</em> (www.arxiv.org/abs/0902.0653v1).</DIV></p><p>http://arxiv.org/PS_cache/arxiv/pdf/0902/0902.0653v1.pdf </p><p>&nbsp;</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> It seems to be a natural consequence of our points of view to assume that the whole of space is filled with electrons and flying electric ions of all kinds. - Kristian Birkeland </div>