Search Publications

CO multi-line imaging of nearby galaxies (COMING). XII. CO-to-H₂ conversion factor and dust-to-gas ratio

Kobayashi, Masato I. N.; Kuno, Nario; Miyamoto, Yusuke +8 more

We simultaneously measured the spatially resolved CO-to-H₂ conversion factor (α_CO) and dust-to-gas ratio (DGR) in nearby galaxies on a kiloparsec scale. In this study, we used ¹²CO(J = 1-0) data obtained by the Nobeyama 45 m radio telescope with H I and dust mass surface densities. We obtained the values of global …

Cosmic-ray-driven enhancement of the C⁰/CO abundance ratio in W 51 C

Yamagishi, Mitsuyoshi; Kaneda, Hidehiro; Shimonishi, Takashi +5 more

We examine spatial variations of the C⁰$/$CO abundance ratio (X_C/CO) in the vicinity of the γ-ray supernova remnant W 51 C, based on [C I] (³P₁-³P₀), ¹²CO(1-0), and ¹³CO(1-0) observations with the ASTE and Nobeyama 45 m telescopes. We find that X_C/CO…

Twisted magnetic field in star formation processes of L1521 F revealed by submillimeter dual-band polarimetry using the James Clerk Maxwell Telescope

Shinnaga, Hiroko; Tomisaka, Kohji; Harada, Naoto +3 more

Understanding the initial conditions of star formation requires both observational studies and theoretical works taking into account the magnetic field, which plays an important role in star formation processes. Herein, we study the young nearby dense cloud core L1521 F [n(H₂) ~10^4-6 cm^-3] in the Taurus Molecular C…