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gr-qc2019
A few numbers from the turnaround epoch of collapse
Jan J. Ostrowski
The turnaround epoch of gravitational collapse is examined by means of relativistic Lagrangian perturbation theory. Averaged, scalar equations applied to the fluid's evolution reve…
astro-ph.CO2019★ 7 cited
Does spatial flatness forbid the turnaround epoch of collapsing structures?
Boudewijn F. Roukema, Jan J. Ostrowski
Cosmological observational analysis frequently assumes that the Universe is spatially flat. We aim to non-perturbatively check the conditions under which a flat or nearly flat expa…