Arising from: F. Özel. Nature 441, 1115–1117 (2006)10.1038/nature04858; Özel replies
In a theoretical interpretation of observational data from the neutron star EXO 0748–676, Özel concludes that quark matter probably does not exist in the centre of neutron stars1. However, this conclusion is based on a limited set of possible equations of state for quark matter. Here we compare Özel's observational limits with predictions based on a more comprehensive set of proposed quark-matter equations of state from the literature, and conclude that the presence of quark matter in EXO 0748–676 is not ruled out.
This is a preview of subscription content, access via your institution
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Rent or buy this article
Get just this article for as long as you need it
Prices may be subject to local taxes which are calculated during checkout
Özel, F. Nature 441, 1115–1117 (2006).
Alford, M., Braby, M., Paris, M. & Reddy, S. Astrophys. J. 629, 969–978 (2005).
Fraga, E. S., Pisarski, R. D. & Schaffner-Bielich, J. Phys. Rev. D 63, 121702 (2001).
Rüster, S. B. & Rischke, D. H. Phys. Rev. D 69, 045011 (2004).
Page, D., Geppert, U. & Weber, F. Nucl. Phys. A 777, 497–530 (2006).
Klähn, T. et al. Phys. Rev. C 74, 035802 (2006).
Grigorian, H., Blaschke, D. & Voskresensky, D. Phys. Rev. C 71, 045801 (2005).
Klahn, T. et al. arXiv:nucl-th/0609067 (2006).
Madsen, J. Phys. Rev. Lett. 85, 10–13 (2000).
Link, B. Phys. Rev. Lett. 91, 101101 (2003).
Alpar, M. A. Phys. Rev. Lett. 58, 2152 (1987).
Alford, M., Rajagopal, K. & Wilczek, F. Nucl. Phys. B 537, 443–458 (1999).
Alford, M., Bowers, J. A. & Rajagopal, K. Phys. Rev. D 63, 074016 (2001).
Watts, A. L. & Reddy, S. arXiv:astro-ph/0609364 (2006).
Page, D. & Cumming, A. Astrophys. J. Lett. 635, L157–L160 (2005).
Rights and permissions
About this article
Cite this article
Alford, M., Blaschke, D., Drago, A. et al. Quark matter in compact stars?. Nature 445, E7–E8 (2007). https://doi.org/10.1038/nature05582
This article is cited by
Methods for relativistic self-gravitating fluids: from binary neutron stars to black hole-disks and magnetized rotating neutron stars
General Relativity and Gravitation (2022)
Properties of quark matter in a new quasiparticle model with QCD running coupling
Science China Physics, Mechanics & Astronomy (2016)
A two-solar-mass neutron star measured using Shapiro delay
The equation of state of QCD under hard-dense-loop approximation
Science in China Series G: Physics, Mechanics and Astronomy (2009)
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.