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Molecular Superbubbles and Outflows from Starburst Galaxy NGC 2146
An-Li Tsai, Satoki Matsushita, Kouichiro Nakanishi +7
We present results from a deep (1 sigma = 5.7 mJy beam^{-1} per 20.8 km s^{-1} velocity channel) ^{12}CO(1-0) interferometric observation of the central 60" region of the nearby ed…
Nobeyama Millimeter Array Observations of the Nuclear Starburst of M83: A GMA Scale Correlation between Dense Gas Fraction and Star Formation Efficiency
Kazuyuki Muraoka, Kotaro Kohno, Tomoka Tosaki +6
We present aperture synthesis high-resolution (~ 7" x 3") observations in CO(J=1-0) line, HCN(J=1-0) line, and 95 GHz continuum emission toward the central (~ 1.5 kpc) region of th…
Molecular Gas Distribution in Barred and Non-Barred Galaxies along the Hubble Sequence
S. Komugi, Y. Sofue, K. Kohno +4
We present results from a survey of 12CO(J=1-0) spectra obtained for the central regions of 68 nearby galaxies at an angular resolution of 16 arcseconds using the Nobeyama Radio Ob…
Interferometric 12CO(J=2-1) image of the Nuclear Region of Seyfert 1 Galaxy NGC 1097
Pei-Ying Hsieh, Satoki Matsushita, Jeremy Lim +2
We have mapped the central region of the Seyfert 1 galaxy NGC 1097 in 12CO(J=2-1) with the Submillieter Array (SMA). The 12CO(J=2-1) map shows a central concentration and a surroun…
Tracing star formation in galaxies with molecular line and continuum observations
K. Kohno, K. Muraoka, B. Hatsukade +14
We report our recent progress on extragalactic spectroscopic and continuum observations, including HCN(J=1-0), HCO(J=1-0), and CN(N=1-0) imaging surveys of local Seyfert and st…
ASTE CO(3--2) Observations of the Southern Barred Spiral Galaxy NGC 986: a Large Gaseous Bar Filled with Dense Molecular Medium
K. Kohno, T. Tosaki, R. Miura +20
We present CO(3-2) emission observations toward the 3'x3' (or 20x20kpc at a distance of 23Mpc) region of the southern barred spiral galaxy NGC 986 using the Atacama Submillimeter T…
A bright, dust-obscured, millimeter-selected galaxy beyond the Bullet Cluster (1E0657-56)
G. W. Wilson, D. Hughes, I. Aretxaga +24
Deep 1.1 mm continuum observations of 1E0657-56 (the "Bullet Cluster") taken with the millimeter-wavelength camera AzTEC on the 10-m Atacama Submillimeter Telescope Experiment (AST…
First Detection of 12CO (1--0) Emission from Two Narrow-Line Seyfert 1 Galaxies
T. Kawaguchi, K. Nakanishi, K. Kohno +2
In order to investigate how the growth of galactic bulges progresses with the growth of central black holes (BHs), we observed molecular gas (fuel for the coming star formation) in…
The 2006 Radio Outburst of a Microquasar Cyg X-3: Observation and Data
M. Tsuboi, T. Tosaki, N. Kuno +22
We present the results of the multi-frequency observations of radio outburst of the microquasar Cyg X-3 in February and March 2006 with the Nobeyama 45-m telescope, the Nobeyama Mi…
Millimeter Interferometric HCN(1-0) and HCO+(1-0) Observations of Luminous Infrared Galaxies
Masatoshi Imanishi, Kouichiro Nakanishi, Yoichi Tamura +2
We present the results on millimeter interferometric observations of four luminous infrared galaxies (LIRGs), Arp 220, Mrk 231, IRAS 08572+3915, and VV 114, and one Wolf-Rayet gala…
Evidence for a Population of High-Redshift Submillimeter Galaxies from Interferometric Imaging
Joshua D. Younger, Giovanni G. Fazio, Jia-Sheng Huang +22
We have used the Submillimeter Array to image a flux limited sample of seven submillimeter galaxies, selected by the AzTEC camera on the JCMT at 1.1 mm, in the COSMOS field at 890u…
Arc-like distribution of high CO(J=3-2)/CO(J=1-0) ratio gas surrounding the central star cluster of the supergiant HII region NGC 604
T. Tosaki, R. Miura, T. Sawada +5
We report the discovery of a high CO(J=3-2)/CO(J=1-0) ratio gas with an arc-like distribution (``high-ratio gas arc'') surrounding the central star cluster of the supergiant HII re…
New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band
Taku Nakajima, Masahiro Kaiden, Jun Korogi +10
We have upgraded the 60-cm radio survey telescope located in Nobeyama, Japan. We developed a new waveguide-type sideband-separating SIS mixer for the telescope, which enables the s…
A Search for CO(J=3-2) Emission from the Host Galaxy of GRB 980425 with the Atacama Submillimeter Telescope Experiment
Bunyo Hatsukade, Kotaro Kohno, Akira Endo +14
We report on a deep search for CO(J=3-2) line emission from the host galaxy of GRB 980425 with the Atacama Submillimeter Telescope Experiment (ASTE). We observed five points of the…
Compact starburst in the central regions of Seyfert galaxies
Kotaro Kohno, Koichiro Nakanishi, Masatoshi Imanishi
We have conducted a high-resolution ``3D'' imaging survey of the CO(1--0), HCN(1--0), and HCO(1--0) lines toward the central a few kpc regions of the Seyfert and starburst gala…
A Revised Estimate of the CO (J=1-0) Emission from the Host Galaxy of GRB 030329 Using the Nobeyama Millimeter Array
Akira Endo, Kotaro Kohno, Bunyo Hatsukade +9
A sensitive observation of the CO (J=1-0) molecular line emission in the host galaxy of GRB 030329 (z =0.1685) has been performed using the Nobeyama Millimeter Array in order to de…
ASTE CO(3-2) Observations of the Barred Spiral Galaxy M 83: I. Correlation between CO(3-2)/CO(1-0) Ratios and Star Formation Efficiencies
Kazuyuki Muraoka, Kotaro Kohno, Tomoka Tosaki +14
We present CO(J=3-2) emission observations with the Atacama Submillimeter Telescope Experiment (ASTE) toward the 5' x 5' (or 6.6 x 6.6 kpc at the distance D = 4.5 Mpc) region of th…
ASTE CO(3--2) Survey of Elliptical Galaxies
Hiroyuki Nakanishi, Tomoka Tosaki, Kotaro Kohno +2
We report CO(3--2) observations of 15 nearby elliptical galaxies carried out with the ASTE telescope. Thirteen were selected without regard to the presence of other trac…
ASTE observations of nearby galaxies: A tight correlation between CO(J=3-2) emission and Halpha
Shinya Komugi, Kotaro Kohno, Tomoka Tosaki +4
Star formation rates (SFRs) obtained via extinction corrected H alpha are compared to dense gas as traced by CO(J=3-2) emission at the centers of nearby galaxies, observed with the…
ASTE Observations of Warm Gas in Low-mass Protostellar Envelopes: Different Kinematics between Submillimeter and Millimeter Lines
Shigehisa Takakuwa, Takeshi Kamazaki, Masao Saito +2
With the ASTE telescope, we have made observations of three low-mass protostellar envelopes around L483, B335, and L723 in the submillimeter CS (=7--6) and HCN (=4--3) lines.…
Kinematics of SiO J=8-7 Emission towards the HH 212 Jet
Michihiro Takami, Shigehisa Takamuwa, Munetake Momose +5
We present SiO J=8-7 (347.3 GHz) observations towards HH 212 using the ASTE telescope. Our observations with a 22''-diameter beam show that the SiO emission is highly concentrated…
Millimeter Interferometric Investigations of the Energy Sources of Three Ultraluminous Infrared Galaxies, UGC 5101, Mrk 273, and IRAS 17208-0014, based on HCN to HCO+ Ratios
Masatoshi Imanishi, Kouichiro Nakanishi, Kotaro Kohno
We present interferometric observations of three ultraluminous infrared galaxies (ULIRGs; UGC 5101, Mrk 273, and IRAS 17208-0014) in the 3-mm wavelength range, using the Nobeyama M…
A high-frequency radio survey of low-luminosity active galactic nuclei
A. Doi, S. Kameno, K. Kohno +2
We investigate the high-frequency radio spectra of twenty low-luminosity active galactic nuclei (LLAGNs) with compact radio cores. Our millimetre survey with the Nobeyama Millimetr…
Dense and Warm Molecular Gas between Double Nuclei of the Luminous Infrared Galaxy NGC 6240
K. Nakanishi, S. K. Okumura, K. Kohno +2
High spatial resolution observations of the 12CO(1-0), HCN(1-0), HCO+(1-0), and 13CO(1-0) molecular lines toward the luminous infrared merger NGC 6240 have been performed using the…