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arXiv · 0704.1510

A compact star rotating at 1122 Hz and the r-mode instability

Alessandro Drago·Giuseppe Pagliara·Irene Parenti
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Abstract

We show that r-mode instabilities severely constraint the composition of a compact star rotating at a submillisecond period. In particular, the only viable astrophysical scenario for such an object, present inside the Low Mass X-ray Binary associated with the x-ray transient XTE J1739-285, is that it has a strangeness content. Since previous analysis indicate that hyperonic stars or stars containing a kaon condensate are not good candidates, the only remaining possibility is that such an object is either a strange quark star or a hybrid quark-hadron star. We also discuss under which conditions sub-millisecond pulsars are rare.

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Alessandro Drago, Giuseppe Pagliara, Irene Parenti. 2008-02-01. A compact star rotating at 1122 Hz and the r-mode instability. https://doi.org/10.1086/588635

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