Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rotating compact strange stars   We compute numerical models of uniformly rotating strange stars (SS) in
general relativity for the recently proposed QCD-based equation of state (EOS)
of strange quark matter (Dey et al. 1998). Static models based on this EOS are
characterised by a larger surface redshift than strange stars within the MIT
bag model. The frequencies of the fastest rotating configurations described by
Dey model are much higher than these for neutron stars (NS) and for the
simplest SS MIT bag model. We determine a number of physical parameters for
such stars and compare them with those obtained for NS. We construct constant
baryon mass equilibrium sequences both normal and supramassive. Similarly to
the NS a supramassive SS, prior to collapse to a black hole, spins up as it
loses angular momentum. We find the upper limits on maximal masses and maximal
frequencies of the rotating configurations. We show that the maximal rotating
frequency for each of considered evolutionary sequences is never the Keplerian
one. A normal and low mass supramassive strange stars gaining angular momentum
always slows down just before reaching the Keplerian limit. For a high mass
supramassive SS sequence the Keplerian configuration is the one with the lowest
rotational frequency in the sequence. The value of $T/W$ for rapidly rotating
SS of any mass is significantly higher than those for ordinary NS. For
Keplerian configurations it increases as mass decreases. The results are robust
for all linear self-bound equations of state.

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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: math
3
The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph