3 papers
gr-qc2026
The linearised conformal Einstein field equations around a Petrov-type~D spacetime: the conformal Teukolsky equation
Edgar Gasperin, Rodrigo Panosso Macedo, Justin Feng
While the Teukolsky equation plays a central role in traditional treatments of perturbations of algebraically special spacetimes, its relation to Friedrich's conformal Einstein fie…
gr-qc2025
Dust stars in the minimal exponential measure model
Reyhan D. Lambaga, Justin C. Feng, Norman Hsia +1
We report the existence of horizonless compact object solutions supported by dust in the Minimal Exponential Measure (MEMe) model, a theory which modifies the couplings between gra…
gr-qc2025
Cosmological constant as an integration constant
Justin C. Feng, Pisin Chen
The discrepancy between the observed value of the cosmological constant (CC) and its expected value from quantum field theoretical considerations motivates the search for a theory…