Journal Article

Strange stars with different quark mass scalings

Ang Li, Ren-Xin Xu and Ju-Fu Lu

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 402, issue 4, pages 2715-2719
Published in print March 2010 | ISSN: 0035-8711
Published online March 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.16091.x
Strange stars with different quark mass scalings

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We investigate the stability of strange quark matter and the properties of the corresponding strange stars for a wide range of quark mass scalings. The calculations show that the resulting maximum mass always lies between 1.5 M and 1.8 M for all the scalings chosen here. Strange star sequences with a linear scaling support the lowest gravitational masses, and a change (increase or decrease) of the scaling around the linear scaling leads to a higher maximum mass. Radii always decrease with the mass scaling. Thus, the larger the scaling, the faster the star might spin. In addition, the variation of the scaling causes an order of magnitude change of the strong electric field on the quark surface. This field is essential to the support of possible crusts of strange stars against gravity and thus may have some astrophysical implications.

Keywords: dense matter; elementary particles; equation of state; stars: interiors

Journal Article.  2663 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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