Publications of the Astronomical Society of Japan Apr 2019 [Refereed]
Recent observations of the nearby Galactic molecular clouds indicate that the dense gas in molecular clouds has quasi-universal properties on star formation, and observational studies of extra-galaxies have shown a galactic-scale correlation betwe...
Publications of the Astronomical Society of Japan Mar 2019 [Refereed]
We present the results of ^{12}CO(J = 1-0) and ^{13}CO(J = 1-0) simultaneous mappings toward the nearby barred spiral galaxy NGC 4303 as part of the CO Multi-line Imaging of Nearby Galaxies (COMING) project. Barred spiral galaxies often show lower...
Publications of the Astronomical Society of Japan Mar 2019 [Refereed]
We examined radial variations in molecular-gas based star formation efficiency (SFE), which is defined as star formation rate per unit molecular gas mass, for 80 galaxies selected from the CO Multi-line Imaging of Nearby Galaxies project (Sorai et...
Publications of the Astronomical Society of Japan Feb 2019 [Refereed]
The 12CO (J = 1→0) velocity fields of a sample of 20 nearby spiral galaxies, selected from the CO Multi-line Imaging of Nearby Galaxies (COMING) legacy project of Nobeyama Radio Observatory, have been analyzed by Fourier decomposition t...
We have carried out observations in the 42-46 and 82-103 GHz bands with the Nobeyama 45 m radio telescope, and in the 338.2-339.2 and 348.45-349.45 GHz bands with the ASTE 10 m telescope, toward three high-mass star-forming regions containing mass...
Junichi Baba, Kana Morokuma-Matsui, Yusuke Miyamoto, Fumi Egusa, Nario Kuno
Apr 2016
There are two theories of stellar spiral arms in isolated disc galaxies that
model stellar spiral arms with different longevities: quasi-stationary density
wave theory, which characterises spirals as rigidly rotating, long-lived
patterns (i.e. ste...
NGC 1808 is a nearby barred starburst galaxy with an outflow from the nuclear
region. To study the inflow and outflow processes related to star formation and
dynamical evolution of the galaxy, we have carried out \(^{12}\)CO (\(J=1-0\))
mapping ob...
We have mapped the Orion-A Giant Molecular Cloud in the CO (J=4-3) line with
the Tsukuba 30-cm submillimeter telescope.The map covered a 7.125 deg^2 area
with a 9' resolution, including main components of the cloud such as Orion
Nebula, OMC-2/3, a...
PASJ : publications of the Astronomical Society of Japan 67(1) Feb 2015
We present the results of ammonia observations toward the center of NGC 3079. The NH3(J, K) = (1, 1) and (2, 2) inversion lines were detected in absorption with the Tsukuba 32 m telescope, and the NH3(1, 1) through (6, 6) lines with the VLA, altho...
