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Dark matter effects on hybrid star properties

C\'esar H. LenziMariana DutraOdilon Louren\c{c}oLuiz L. LopesD\'ebora P. Menezes
Dec 2022
摘要
In the present work we investigate the effects of dark matter (DM) on hybridstar properties. We assume that dark matter is mixed with both hadronic andquark matter and interact with them through the exchange of a Higgs boson. Thehybrid star properties are obtained from equations of state calculated with aMaxwell prescription. For the hadronic matter we use the NL3* parameter set andfor the quark matter, the MIT bag model with a vector interaction. We see thatdark matter does not influence the phase transition points (pressure andchemical potential) but shifts the discontinuity on the energy density, whichultimately reduces the minimum mass star that contains a quark core. Moreover,it changes considerably the star family mass-radius diagrams and moves themerger polarizability curves inside the confidence lines. Another interestingfeature is the influence of DM in the quark core of the hybrid starsconstructed. Our results show an increase of the core radius for higher valuesof the dark particle Fermi momentum.
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