Journal ArticleDOI
Relativistic Equations for Adiabatic, Spherically Symmetric Gravitational Collapse
Charles W. Misner,David H. Sharp +1 more
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Relativistic gravitational collapse equations assuming spherical symmetry, adiabatic flow and pressure gradient forces were proposed in this paper, where spherical symmetry was assumed to be a function of the density.Abstract:
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f(R) theories
TL;DR: Various applications of f(R) theories to cosmology and gravity — such as inflation, dark energy, local gravity constraints, cosmological perturbations, and spherically symmetric solutions in weak and strong gravitational backgrounds are reviewed.
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Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
TL;DR: In this paper, a review of different dark energy cosmologies for different fluids is presented, and their properties are also explored, and special attention is paid to the equivalence of different models.
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Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
TL;DR: In this article, a review of different dark energy cosmologies is presented, including the Lambda$CDM cosmology, Little Rip and Pseudo-Rip universes, the phantom and quintessence cosmology with Type I, II, III and IV finite-time future singularities and non-singular dark energy universes.
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Ghost condensation and a consistent infrared modification of gravity
Nima Arkani-Hamed,Hsin-Chia Cheng,Markus A. Luty,Markus A. Luty,Markus A. Luty,Shinji Mukohyama +5 more
TL;DR: In this article, the authors proposed a theoretically consistent modification of gravity in the infrared, which is compatible with all current experimental observations and opens up a number of new avenues for attacking cosmological problems, including inflation, dark matter and dark energy.
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f(T) teleparallel gravity and cosmology
Yi-Fu Cai,Salvatore Capozziello,Mariafelicia De Laurentis,Emmanuel N. Saridakis,Emmanuel N. Saridakis,Emmanuel N. Saridakis +5 more
TL;DR: In this paper, the role of torsion in gravity has been extensively investigated along the main direction of bringing gravity closer to its gauge formulation and incorporating spin in a geometric description.