Assistant Professor @ Kanagawa University
Email: shingo-hirano [AT] kanagawa-u.ac.jp
CV (researchgate, ORCiD)
Publications (ADS, Google Scholar, Web of Science, Scopus)
Funds (KAKEN)
(//) [paper/1st] "Dark Matter Density Profile Around a Newborn First Star", Hirano & Yoshida, submitted to JCAP (arXiv)
(//) [paper] "A Semi-analytic Framework of Population III and Subsequent Galaxy Formation on Ultralarge Cosmological N-body Simulations", Ishiyama & Hirano, submitted to ApJ (arXiv)
(2025/09/11) [Conference] "Dark Matter Density Profile Around a Newborn First Star", ASJ 2025 Autumn Annual Meeting@Kaikyo Messe Shimonoseki
(2025/07/24) [Seminar] "Ambient Dark Matter Around a Newborn First Star", RESCEU Thursday seminar@UTokyo/RESCUE
(2025/07/10) [paper] "Effect of Magnetic Field on the Accretion Phase of Population III Star Formation" Machida, Hirano, Basu, ApJ, 988(2025)6
(2025/05/27-30) [Conference] "Formation of first star clusters under the supersonic gas flow" (poster + lightning talk), CFC2025@University of Texas at Austin
(2025/05/10) [paper/1st] "Formation of first star clusters under the supersonic gas flow - II. Critical halo mass and core mass function", Hirano, MNRAS, 540(2025)331
(2025/03/27) [paper/1st] "Velocity Structure of Circumstellar Environment around Class 0/I Protostars: Uncertainty in the Protostellar Mass Estimation Using Circumstellar Velocities", Hirano, Aikawa, Machida, ApJ, 982(2025)68
(2025/02/20) [paper] "Evidence for Jet/Outflow Shocks Heating the Environment around the Class I Protostellar Source Elias 29: FAUST XXI", Oya et al., ApJ, 980(2025)263
(2025/01/06) [paper] "An analytic model of gravitational collapse induced by radiative cooling: Instability scale, density profile, and mass infall rate", Gurian et al., MNRAS, 537(2025)580
(2024/09/11) [paper] "Towards a universal analytical model for Population III star formation: interplay between feedback and fragmentation". Liu et al. MNRAS, 534(2024)290
(2024/05/21) [CF] "Formation efficiency of the first stars in the first galaxies" (First Stars VII@NYC) -> see you again at First Stars VIII@Florence in 2028!
(2024/04/16) [paper] "Low-mass Population III Star Formation due to the HD Cooling Induced by Weak Lyman–Werner Radiation", Nishijima, Hirano, Umeda, ApJ, 965(2024)141
(2024/02/21) [paper/1st] "Early Structure Formation from Primordial Density Fluctuations with a Blue, Tilted Power Spectrum: High-redshift Galaxies", Hirano, Yoshida, ApJ, 963(2024)2
(2023/11/30) [paper] "Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations", Sugimura et al., ApJ, 959(2023)17
(2023/11/16) [paper] "Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens", Sato et al., ApJ, 958(2023)102
(2023/10/01) [transfer] Joined Kanagawa University
My scientific goal is to recognize the whole history of the Universe in the astronomical aspect. In especially, my research focuses on FIRST STARS, historic milestones which mark a turning point of the cosmic evolution. I am trying to uncover mystery-shrouded properties of such the first-generation of stars by using theoretical, numerical, and observational approaches.
Formation of first stars, first galaxies, and first blackholes in the early universe
Effect of the dark matter nature on the early structure formation
Observational visualization of the star-forming region
Computational astrophysics: N-body, radiation-/magneto-hydrodynamics
"One hundred first stars: Protostellar evolution and the final masses" (2014) ApJ, 781 (60)
"Supersonic gas streams enhance the formation of massive black holes in the early Universe" (2017) Science, 357 (1375)
"Formation of magnetic field structure, disc, and outflows during the protostellar accretion phase" (2019) MNRAS, 485 (4667)
