Mass and radius relations of quarkyonic matter using an excluded volume model. (arXiv:2011.04681v2 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Sen_S/0/1/0/all/0/1">Srimoyee Sen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sivertsen_L/0/1/0/all/0/1">Lars Sivertsen</a>
Inspired by the excluded volume model for isospin symmetric quarkyonic
matter, we construct an `excluded volume’ model for a charge neutral quarkyonic
phase whose hadronic sector contains only neutrons. We refer to this model as
quarkyonic neutron matter. We compute the equation of state for this model and
solve the Tolman-Oppenhermer-Volkoff equations to obtain mass and radius
relations relevant for neutron stars. The most straightforward extension of the
model for symmetric quarkyonic matter to quarkyonic neutron matter does not
satisfy the mass radius constraints from neutron star measurements. However, we
show that by incorporating appropriate nuclear interactions in the excluded
volume model one can produce mass-radius relations that lie within the
constraints obtained from gravitational waves of binary neutron star mergers
and maximum mass measurements of neutron stars.
Inspired by the excluded volume model for isospin symmetric quarkyonic
matter, we construct an `excluded volume’ model for a charge neutral quarkyonic
phase whose hadronic sector contains only neutrons. We refer to this model as
quarkyonic neutron matter. We compute the equation of state for this model and
solve the Tolman-Oppenhermer-Volkoff equations to obtain mass and radius
relations relevant for neutron stars. The most straightforward extension of the
model for symmetric quarkyonic matter to quarkyonic neutron matter does not
satisfy the mass radius constraints from neutron star measurements. However, we
show that by incorporating appropriate nuclear interactions in the excluded
volume model one can produce mass-radius relations that lie within the
constraints obtained from gravitational waves of binary neutron star mergers
and maximum mass measurements of neutron stars.
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