32 citations · 77 across the 5 of their papers we have counts for
5 papers
f(R) gravity constraints from gravitational waves
Jaakko Vainio, Iiro Vilja
The recent LIGO observation sparked interest in the field of gravity wave signals. Besides the gravity wave observation the LIGO collaboration used the inspiraling black hole pair…
Jeans Analysis of Bok globules in gravity
Jaakko Vainio, Iiro Vilja
We examine the effects of gravity on Jeans analysis of collapsing dust clouds. We provide a method for testing modified gravity models by their effects on star formation as…
Stability of the scale parameter: Hu-Sawicki model
Jaakko Vainio, Iiro Vilja
The evolution of the scale parameter in the Hu-Sawicki model is examined. We search the parameter area for instabilities. It turns out the parameter area of physically meaningful e…
Hamiltonian perturbation theory in f(R) gravity
Tuomas Multamäki, Jaakko Vainio, Iiro Vilja
Hamiltonian perturbation theory is used to analyse the stability of f(R) models. The Hamiltonian equations for the metric and its momentum conjugate are written for f(R) Lagrangian…
Maximal symmetry and metric-affine f(R) gravity
Tuomas Multamäki, Jaakko Vainio, Iiro Vilja
The affine connection in a space-time with a maximally symmetric spatial subspace is derived using the properties of maximally symmetric tensors. The number of degrees of freedom i…