Quark matter in compact stars?
  Ozel, in a recent reanalysis of EXO 0748-676 observational data (astro-ph/0605106), concluded that quark matter probably does not exist in the center of compact stars. We show that the data is actually consistent with the presence of quark matter in compact stars. 
Mark Alford, David Blaschke, Alessandro Drago, Thomas Klahn, Giuseppe   Pagliara, Juergen Schaffner-Bielich