23 citations · 30 across the 3 of their papers we have counts for
9 papers
Gravitational waves from binary black holes as probes of the structure formation history
Tomohiro Nakama
Gravitational-wave detectors on earth have detected gravitational waves from merging compact objects in the local Universe. In future we will detect gravitational waves from higher…
Ultracompact minihalos associated with stellar-mass primordial black holes
Tomohiro Nakama, Kazunori Kohri, Joseph Silk
The possibility that primordial black hole binary mergers of stellar mass can explain the signals detected by the gravitational-wave interferometers has attracted much attention. I…
Spectral Distortions of the CMB as a Probe of Inflation, Recombination, Structure Formation and Particle Physics
J. Chluba, A. Kogut, S. P. Patil +98
Following the pioneering observations with COBE in the early 1990s, studies of the cosmic microwave background (CMB) have focused on temperature and polarization anisotropies. CMB…
Gravitational Production of Superheavy Dark Matter and Associated Cosmological Signatures
Lingfeng Li, Tomohiro Nakama, Chon Man Sou +2
We study the gravitational production of super-Hubble-mass dark matter in the very early universe. We first review the simplest scenario where dark matter is produced mainly during…
Detectability of Gravitational Waves from the Coalescence of Massive Primordial Black Holes with Initial Clustering
Qianhang Ding, Tomohiro Nakama, Joseph Silk +1
We show that the effect of initial non-Gaussian clustering can significantly enhance the event rate for primordial black hole (PBH) coalescence. The impact of such clustering is st…
Gravitational waves induced by scalar perturbations as probes of the small-scale primordial spectrum
Keisuke Inomata, Tomohiro Nakama
Compared to primordial perturbations on large scales, roughly larger than megaparsec, those on smaller scales are not severely constrained. We revisit the issue of probing smal…