205 citations · 665 across the 24 of their papers we have counts for
10 papers · 1 filter
ALMA [CI] Image of the Circumnuclear Disk of the Milky Way: Inflowing Low-density Molecular Gas
Kunihiko Tanaka, Makoto Nagai, Kazuhisa Kamegai
We present ALMA [\ion{C}{1}]~-- imaging of the central region of the Galaxy encompassing the circumnuclear disk (CND). The data reveal lo…
Atomic Carbon in the Central Molecular Zone of the Milky Way : Possible Cosmic-ray Induced Chemistry or Time-Dependent Chemistry Associated with SNR Sagittarius A East
Kunihiko Tanaka, Makoto Nagai, Kazuhisa Kamegai
Being one of the most abundant atomic/molecular species observed in dense molecular gas, atomic carbon () is a potential good tracer of molecular gas mass in many che…
HCN =4-3, HNC =1-0, =1-0, and =10-9 Maps of Galactic Center Region II.: Physical Properties of Dense Gas Clumps and Probability of Star Formation
Kunihiko Tanaka, Makoto Nagai, Kazuhisa Kamegai +2
We report a statistical analysis exploring the origin of the overall low star formation efficiency (SFE) of the Galactic central molecular zone (CMZ) and the SFE diversity among th…
HCN =4-3, HNC =1-0, =1-0, and =10-9 Maps of Galactic Center Region I: Spatially-Resolved Measurements of Physical Conditions and Chemical Composition
Kunihiko Tanaka, Makoto Nagai, Kazuhisa Kamegai +2
This {\it supplement} paper presents the maps of HCN =4-3, HNC =1-0, =1-0, and HCN =10-9 for the Galactic central molecular zone (CMZ), which ha…
FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) I: Project Overview and Initial Results
Tomofumi Umemoto, Tetsuhiro Minamidani, Nario Kuno +41
The FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) project is one of the legacy projects using the new multi-beam FOREST receiver installed…
CO-0.30-0.07: A Peculiar Molecular Clump with an Extremely Broad Velocity Width
Kunihiko Tanaka, Makoto Nagai, Kazuhisa Kamegai +1
The high velocity dispersion compact cloud CO-0.30-0.07 is a peculiar molecular clump discovered in the central moleculr zone of the Milky Way, which is characterized by its extrem…
High Velocity Compact Clouds in the Sagittarius C Region
Kunihiko Tanaka, Tomoharu Oka, Shinji Matsumura +2
We report the detection of extremely broad emission toward two molecular clumps in the Galactic central molecular zone. We have mapped the Sagittarius C complex ($-0^\circ.61 < l <…
Discovery of the Pigtail Molecular Cloud in the Galactic Center
Shinji Matsumura, Tomoharu Oka, Kunihiko Tanaka +3
This paper reports the discovery of a helical molecular cloud in the central molecular zone (CMZ) of our Galaxy. This "pigtail" molecular cloud appears at (l, b, V_LSR) ~ (-0.7deg,…
High Atomic Carbon Abundance in Molecular Clouds in the Galactic Center Region
Kunihiko Tanaka, Tomoharu Oka, Shinji Matsumura +2
This letter presents a Nyquist-sampled, high-resolution [CI] 3P1-3P0 map of the -0.2 deg < l < 1.2 deg x -0.1 deg < b < 0 deg region in the Central Molecular Zone (CMZ) taken with…
The ASTE Galactic Center CO J=3-2 Survey: Probing Shocked Molecular Gas in the CMZ
Tomoharu Oka, Kunihiko Tanaka, Shinji Matsumura +3
Large-scale CO surveys have revealed that the central molecular zone (CMZ) of our Galaxy is characterized by a number of expanding shells/arcs, and by a peculiar population of comp…