Constraints on the a − λ plane, resulting from Mmax > 2 M⊙, obtained assuming a BM165 EOS of baryon matter and a quark core starting at P1 = 47 MeV fm-3. Each line is an upper boundary of the region of (aCFL,λCFL) consistent with Mmax > 2 M⊙. Solid lines are obtained for quark cores composed of a 2SC layer (P1 < P < P2) and a CFL core starting at P2 = 69 MeV fm-3. These lines are labeled by the density jump at the B-2SC interface λ2SC = 1.05,1.15,1.30. We used a2SC = 0.3 (Agrawal 2010). The dashed line is obtained for purely CFL cores (no 2SC layer) starting at P2, and the dotted line corresponds to purely CFL cores starting at P1, i.e., replacing the 2SC with the CFL phase. (This figure is available in color in the electronic form.)
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