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- W4386470950 abstract "Numerical simulation of strange quark stars (QSs) is challenging due to the strong density discontinuity at the stellar surface. In this paper, we report successful simulations of rapidly rotating QSs and study their oscillation modes in full general relativity. Building on top of the numerical relativity code einstein toolkit, we implement a positivity-preserving Riemann solver and a dustlike atmosphere to handle the density discontinuity at the surface. The robustness of our numerical method is demonstrated by performing stable evolutions of rotating QSs close to the Keplerian limit and extracting their oscillation modes. We focus on the quadrupolar $l=|m|=2$ $f$-mode and study whether they can still satisfy the universal relations recently proposed for rotating neutron stars (NSs). We find that two of the three proposed relations can still be satisfied by rotating QSs. For the remaining broken relation, we propose a new relation to unify the NS and QS data by invoking the dimensionless spin parameter $j$. The onsets of secular instabilities for rotating QSs are also studied by analyzing the $f$-mode frequencies. Same as the result found previously for NSs, we find that QSs become unstable to the Chandrasekhar-Friedman-Schutz instability when the angular velocity of the star $mathrm{ensuremath{Omega}}ensuremath{approx}3.4{ensuremath{sigma}}_{0}$ for sequences of constant central energy density, where ${ensuremath{sigma}}_{0}$ is the mode frequency of the corresponding nonrotating configurations. For the viscosity-driven instability, we find that QSs become unstable when $jensuremath{approx}0.881$ for both sequences of constant central energy density and constant baryon mass. Such a high value of $j$ cannot be achieved by realistic uniformly rotating NSs before reaching the Keplerian limit. The critical value for the ratio between the rotational kinetic energy and gravitational potential energy of rotating QSs for the onset of the instability, when considering sequences of constant baryon mass, is found to agree with an approximate value obtained for homogeneous incompressible bodies in general relativity to within 4%." @default.
- W4386470950 created "2023-09-07" @default.
- W4386470950 creator A5002542447 @default.
- W4386470950 creator A5090970047 @default.
- W4386470950 date "2023-09-06" @default.
- W4386470950 modified "2023-10-15" @default.
- W4386470950 title "Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations" @default.
- W4386470950 cites W1522916454 @default.
- W4386470950 cites W1576159487 @default.
- W4386470950 cites W1601141767 @default.
- W4386470950 cites W1865396077 @default.
- W4386470950 cites W1964401096 @default.
- W4386470950 cites W1971821897 @default.
- W4386470950 cites W1978574491 @default.
- W4386470950 cites W1979654065 @default.
- W4386470950 cites W1980103755 @default.
- W4386470950 cites W1986742199 @default.
- W4386470950 cites W1987848727 @default.
- W4386470950 cites W1994870116 @default.
- W4386470950 cites W1997544533 @default.
- W4386470950 cites W1998006455 @default.
- W4386470950 cites W2001932675 @default.
- W4386470950 cites W2009771023 @default.
- W4386470950 cites W2011591061 @default.
- W4386470950 cites W2018516732 @default.
- W4386470950 cites W2020670193 @default.
- W4386470950 cites W2022836438 @default.
- W4386470950 cites W2023706338 @default.
- W4386470950 cites W2028230616 @default.
- W4386470950 cites W2028723587 @default.
- W4386470950 cites W2035391277 @default.
- W4386470950 cites W2041166651 @default.
- W4386470950 cites W2043057066 @default.
- W4386470950 cites W2045694681 @default.
- W4386470950 cites W2052154045 @default.
- W4386470950 cites W2052813489 @default.
- W4386470950 cites W2056543278 @default.
- W4386470950 cites W2061083933 @default.
- W4386470950 cites W2061816432 @default.
- W4386470950 cites W2064819823 @default.
- W4386470950 cites W2069322629 @default.
- W4386470950 cites W2072626016 @default.
- W4386470950 cites W2073945818 @default.
- W4386470950 cites W2074900879 @default.
- W4386470950 cites W2078033075 @default.
- W4386470950 cites W2078692702 @default.
- W4386470950 cites W2084776045 @default.
- W4386470950 cites W2087447386 @default.
- W4386470950 cites W2091178963 @default.
- W4386470950 cites W2096475520 @default.
- W4386470950 cites W2104078860 @default.
- W4386470950 cites W2109614403 @default.
- W4386470950 cites W2112717252 @default.
- W4386470950 cites W2116729868 @default.
- W4386470950 cites W2120634693 @default.
- W4386470950 cites W2121998732 @default.
- W4386470950 cites W2140486468 @default.
- W4386470950 cites W2140634668 @default.
- W4386470950 cites W2141939763 @default.
- W4386470950 cites W2149095714 @default.
- W4386470950 cites W2151501573 @default.
- W4386470950 cites W2155592422 @default.
- W4386470950 cites W2168835871 @default.
- W4386470950 cites W2171431553 @default.
- W4386470950 cites W2252795400 @default.
- W4386470950 cites W2261794778 @default.
- W4386470950 cites W2270205340 @default.
- W4386470950 cites W2420525394 @default.
- W4386470950 cites W2462804364 @default.
- W4386470950 cites W2592214154 @default.
- W4386470950 cites W2625924335 @default.
- W4386470950 cites W2737767196 @default.
- W4386470950 cites W2765081049 @default.
- W4386470950 cites W2767122548 @default.
- W4386470950 cites W2784318652 @default.
- W4386470950 cites W2887890374 @default.
- W4386470950 cites W2903847656 @default.
- W4386470950 cites W2943561459 @default.
- W4386470950 cites W2965853116 @default.
- W4386470950 cites W2980723814 @default.
- W4386470950 cites W2999365684 @default.
- W4386470950 cites W3023313273 @default.
- W4386470950 cites W3040969003 @default.
- W4386470950 cites W3047823159 @default.
- W4386470950 cites W3091760768 @default.
- W4386470950 cites W3098343980 @default.
- W4386470950 cites W3099800005 @default.
- W4386470950 cites W3100858261 @default.
- W4386470950 cites W3100928534 @default.
- W4386470950 cites W3101807044 @default.
- W4386470950 cites W3101832955 @default.
- W4386470950 cites W3102587511 @default.
- W4386470950 cites W3102732565 @default.
- W4386470950 cites W3103204141 @default.
- W4386470950 cites W3105173305 @default.
- W4386470950 cites W3105816330 @default.
- W4386470950 cites W3106200698 @default.
- W4386470950 cites W3106297990 @default.
- W4386470950 cites W3127012733 @default.
- W4386470950 cites W3129455614 @default.