Now showing items 1-4 of 4

    • Chaplygin-gas solutions of f(R) gravity 

      Elmardi, Maye; Abebe, Amare; Tekola, Abiy (World Scientific Publishing, 2016)
      We explore exact f(R) gravity solutions that mimic Chaplygin-gas inspired CDM cosmology. Starting with the original, generalized and modified Chaplygin gas equations of state, we reconstruct the forms of f(R) Lagrangians. ...
    • The fast radio burst luminosity function and death line in the low-twist Magnetar Model 

      Wadiasingh, Zorawar; Beniamini, Paz; Timokhin, Andrey; Baring, Matthew G.; Van der Horst, Alexander J. (IOP, 2020)
      We explore the burst energy distribution of fast radio bursts (FRBs) in the low-twist magnetar model of Wadiasingh & Timokhin (WT19). Motivated by the power-law fluence distributions of FRB 121102, we propose an elementary ...
    • Fast radio burst trains from magnetar oscillations 

      Wadiasingh, Zorawar; Chirenti, Cecilia (IOP Publishing, 2020)
      Quasi-periodic oscillations inferred during rare magnetar giant flare tails were initially interpreted as torsional oscillations of the neutron star (NS) crust, and have been more recently described as global core+crust ...
    • Integrability conditions of quasi-Newtonian cosmologies in modified gravity 

      Abebe, Amare; Dunsby, Peter K.S.; Solomons, Deon (World Scientific, 2017)
      We investigate the integrability conditions of a class of shear-free perfect-fluid cosmological models within the framework of anisotropic fluid sources, applying our results to f(R) dark energy models. Generalizing earlier ...