24 citations · 46 across the 9 of their papers we have counts for
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gr-qc2023★ 1 cited
Inflationary gravitational wave background as a tail effect
Niko Jokela, K. Kajantie, M. Laine +2
The free propagator of a massless mode in an expanding universe can be written as a sum of two terms, a lightcone and a tail part. The latter describes a subluminal (time-like) sig…
gr-qc2023★ 3 cited
Gravitational wave memory in conformally flat spacetimes
Niko Jokela, K. Kajantie, Miika Sarkkinen
We study the gravitational wave memory effect in spacetimes related to flat space by a conformal transformation. The discussion is general but the gravitational wave length scale i…
gr-qc2022★ 24 cited
Gravitational wave memory and its tail in cosmology
Niko Jokela, K. Kajantie, Miika Sarkkinen
We study gravitational wave memory effect in the FRW cosmological model with matter and cosmological constant. Since the background is curved, gravitational radiation develops a ta…