6 papers
Systematic study of the morphology and length of slow stable hybrid star branches
Mauro Mariani, Milva G. Orsaria, Germán Lugones +1
We introduce and systematically study the length of the slow stable hybrid star branch as a quantitative measure of the extended stability region that arises in hybrid neutron star…
Sub-GeV dark matter in neutron stars: halo morphologies and their suppression by vacuum-like pressure
Loreany F. Araújo, Germán Lugones, José Ademir S. Lima
We investigate neutron stars that contain a unified dark sector composed of cold, degenerate fermionic dark matter and a vacuum-like dark-energy component. Within a general-relativ…
Self-bound quark stars with a first-order two-to-three flavor phase transition
G. Teruya, G. Lugones, A. G. Grunfeld
We investigate self-bound quark stars in a flavor-dependent quark-mass density-dependent model with an excluded-volume correction. We chart the parameter space at zero pressure to…
The Delta-isobar masquerade: intrahadronic phase transitions and their quark-mimicking signatures in neutron stars
Martin O. Canullan-Pascual, Germán Lugones, Ignacio F. Ranea-Sandoval +1
We investigate the conditions under which isobars trigger a first-order phase transition within purely hadronic neutron-star matter, using the SW4L relativistic mean-fie…
Towards a unified hadron-quark equation of state for neutron stars within the relativistic mean-field model
Marcos O. Celi, Mauro Mariani, Milva G. Orsaria +2
The equation of state of dense matter remains a central challenge in astrophysics and high-energy physics, particularly at supra-nuclear densities where exotic degrees of freedom l…
Scaling and universality in strange quark stars
G. Lugones, A. G. Grunfeld
We derive scaling laws that connect certain macroscopic observables of strange quark stars with key microscopic properties of self-bound quark matter, such as the energy per baryon…