Kousuke Ishihara

collaborators

3 papers

astro-ph.GA2025

Turbulent fragmentation as the primary driver of core formation in Polaris Flare and Lupus I

Kousuke Ishihara, Fumitaka Nakamura, Patricio Sanhueza +1

Stars form from dense cores in turbulent molecular clouds. According to the standard scenario of star formation, dense cores are created by cloud fragmentation. However, the physic…

astro-ph.GA2025

Digging into the Interior of Hot Cores with ALMA (DIHCA). V. Deuterium Fractionation of Methanol

Takeshi Sakai, Nobuhito Shiomura, Patricio Sanhueza +16

We have observed the $^{13}$ CH $_{3}$ OH $5_{1} - 4_{1}$ A $^{+}$ , $^{13}$ CH $_{3}$ OH $1 4_{1} - 1 3_{2}$ A $^{-}$ , and CH $_{2}$ DOH $8_{2, 6} - 8_{1, 7}$ $e_{0}$ lines toward 24 high-mass star-forming regions by usi…

astro-ph.GA2024

Accretion vs. Core-Filament Collision: Implications for Streamer Formation in Per-emb-2

Fumitaka Nakamura, Quang Nguyen-Luong, Kousuke Ishihara +1

Recent millimeter and submillimeter observations have unveiled elongated and asymmetric structures around protostars. These structures, referred to as streamers, often exhibit cohe…