94 citations · 231 across the 4 of their papers we have counts for
4 papers
Dynamics of a spherical object of uniform density in an expanding universe
Roshina Nandra, Anthony Lasenby, Michael Hobson
We present Newtonian and fully general-relativistic solutions for the evolution of a spherical region of uniform interior density ρ_i(t), embedded in a background of uniform exteri…
Making sense of the bizarre behaviour of horizons in the McVittie spacetime
Valerio Faraoni, Andres F. Zambrano Moreno, Roshina Nandra
The bizarre behaviour of the apparent (black hole and cosmological) horizons of the McVittie spacetime is discussed using, as an analogy, the Schwarzschild-de Sitter-Kottler spacet…
The effect of an expanding universe on massive objects
Roshina Nandra, Anthony N. Lasenby, Michael P. Hobson
We present some astrophysical consequences of the metric for a point mass in an expanding universe derived in Nandra, Lasenby & Hobson, and of the associated invariant expression f…
The effect of a massive object on an expanding universe
Roshina Nandra, Anthony N. Lasenby, Michael P. Hobson
A tetrad-based procedure is presented for solving Einstein's field equations for spherically-symmetric systems; this approach was first discussed by Lasenby et al. in the language…