Preprint

1. K. Uehara, A. Escrivà, T. Harada, D. Saito and C. M. Yoo, “Primordial black hole formation from a type II perturbation in the absence and presence of pressure,” [arXiv:2505.00366 [gr-qc]].
2. Toya Suzuki, Takahisa Igata, Kazunori Kohri and Tomohiro Harada, “General relativistic effects on photon spectrum emitted from dark matter halos around primordial black holes,” [arXiv:2504.00449 [hep-ph]].
3. Tomohiro Harada, Chiang-Mei Chen and Rituparna Mandal, “Singularity resolution and regular black hole formation in gravitational collapse in asymptotically safe gravity,” [arXiv:2502.16787 [gr-qc]].
4. Masahiro Shimano, Tomohiro Harada and Naoki Tsukamoto, “A trapped surface in the higher-dimensional self-similar Vaidya spacetime,” arXiv:1108.3471 [gr-qc].