Strange stars with different quark mass scalings

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 wit...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2010-03, Vol.402 (4), p.2715-2719
Main Authors: Li, Ang, Xu, Ren-Xin, Lu, Ju-Fu
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
dense matter
Earth, ocean, space
elementary particles
equation of state
Exact sciences and technology
Quarks
Stars & galaxies
stars: interiors
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Summary: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.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2009.16091.x