http://arxiv.org/abs/1908.10355
Recently, it was shown that quark matter with only $u$, $d$ quarks ($ud$QM) can be the ground state of matter for baryon number $A>A_\textrm{min}$ with $A_{\rm min}\gtrsim 300$. In this paper, we explore $ud$ quark stars ($ud$QSs) that are made of $ud$QM in the context of the gravitational-wave probe of the tidal deformability in binary star mergers, in contrast to previous studies of hadronic stars (HSs) and strange quark stars (SQSs). We give complete analyses of the two-families scenario, which includes cases of $ud$QS-$ud$QS and $ud$QS-HS mergers. The obtained values of the tidal deformability at 1.4 solar mass and the average tidal deformability are in good compatibility with the GW170817 and AT2017gfo constraints.
C. Zhang
Wed, 28 Aug 19
14/60
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