Browsing Astronomy and Astrophysics by Title
Now showing items 140-159 of 195
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Post-Newtonian cosmological modelling
(2015-05-26) -
The Power of General Relativity
We study the cosmological and weak-field properties of theories of gravity derived by extending general relativity by means of a Lagrangian proportional to $R^{1+\delta}$. This scale-free extension reduces to general ... -
Properties of Black Hole Radiation From Tunnelling
We consider the space-time associated with the evaporation of a black hole by quantum mechanical tunnelling events. It is shown that the surface through which tunnelling occurs is distinct from the global event horizon, ... -
PyTransport: A Python package for the calculation of inflationary correlation functions
(2016-09-05)PyTransport constitutes a straightforward code written in C++ together with Python scripts which automatically edit, compile and run the C++ code as a Python module. It has been written for Unix-like systems (OS X and ... -
Roulettes: A weak lensing formalism for strong lensing — II. Derivation and analysis —
(IOP Publishing: Hybrid Open Access, 2016-11-14) -
Saturn’s F ring is intermittently shepherded by Prometheus
(American Association for the Advancement of Science (AAAS), 2024-05-10)<jats:p>One of the stranger planetary rings is Saturn’s narrow, clumpy F ring, lying just outside the main rings, in a region disturbed by chaotic orbital dynamics. We show that the F ring has a stable “true core” that ...