3 papers
gr-qc2026
Two-Fluid Schwarzschild Solution
Rico Zöllner, Burkhard Kämpfer
We consider the interior two-fluid Schwarzschild solution. That is a model of compact (neutron) stars with admixed dark matter. The two constant energy densities generalize the int…
astro-ph.HE2025
Core-Corona Decomposition of Very Compact (Neutron) Stars: Accounting for Current Data of XTE J1814-338
Rico Zöllner, Burkhard Kämpfer
A core-corona decomposition of compact (neutron) star models was compared with the current mass-radius data of the outlier XTE~J1814-338. The corona (which may also be dubbed the e…
hep-th2024
Towards a warm holographic equation of state by an Einstein-Maxwell-dilaton model
Rico Zöllner, Burkhard Kämpfer
The holographic Einstein-Maxwell-dilaton model is employed to map state-of-the-art lattice QCD thermodynamics data from the temperature () axis towards the baryon-chemical poten…