268 citations · 1.7k across the 60 of their papers we have counts for
18 papers · 1 filter
Q-band Line Survey Observations toward a Carbon-chain-rich Clump in the Serpens South Region
Kotomi Taniguchi, Fumitaka Nakamura, Sheng-Yuan Liu +17
We have conducted Q-band (30 GHz 50 GHz) line survey observations toward a carbon-chain emission peak in the Serpens South cluster-forming region with the extended Q-band (eQ)…
An ultra wide-band, high-sensitivity Q-band receiver for single-dish telescopes, eQ: rest frequency determination of CCS ( = -) and SO ( = -), and high-redshift CO ( = 1-0) detection
Fumitaka Nakamura, Chau-Ching Chiong, Kotomi Taniguchi +16
We report on the development and commissioning of a new Q-band receiver for the Nobeyama 45-m telescope, covering 30--50 GHz with a receiver noise temperature of about 15 K. We nam…
Variability, flaring and coherence -- the complementarity of the maser and superradiance regimes
Martin Houde, Fereshteh Rajabi, Gordon C. MacLeod +5
We discuss the role that coherence phenomena can have on the intensity variability of spectral lines associated with maser radiation. We do so by introducing the fundamental cooper…
Modelling of the multi-transition periodic flaring in G9.62+0.20E
F. Rajabi, M. Houde, G. C. MacLeod +5
We present detailed modeling of periodic flaring events in the 6.7 GHz and 12.2 GHz methanol lines as well as the OH 1665 MHz and 1667 MHz transitions observed in the G9.62+0.20E s…
The evolution of the H2O maser emission in the accretion burst source G358.93-0.03
O. S. Bayandina, C. L. Brogan, R. A. Burns +10
The massive young stellar object (MYSO) G358.93-0.03-MM1 showed an extraordinary near-infrared- to (sub-)millimetre-dark and far-infrared-loud accretion burst, which is closely ass…
A multi-transition methanol maser study of the accretion burst source G358.93-0.03-MM1
O. S. Bayandina, C. L. Brogan, R. A. Burns +8
We present the most complete to date interferometric study of the centimeter wavelength methanol masers detected in G358.93-0.03 at the burst and post-burst epochs. A unique, NIR/(…
East Asian VLBI Network Observations of Active Galactic Nuclei Jets: Imaging with KaVA+Tianma+Nanshan
Yuzhu Cui, Kazuhiro Hada, Motoki Kino +74
The East Asian very-long-baseline interferometry (VLBI) Network (EAVN) is a rapidly evolving international VLBI array that is currently promoted under joint efforts among China, Ja…
Water maser variability in a high-mass YSO outburst -- VERA and ALMA observations of S255 NIRS 3
Tomoya Hirota, Riccardo Cesaroni, Luca Moscadelli +5
We carried out observations of the 22 GHz H2O masers in a high-mass protostar S255 NIRS 3 by using VERA. We measured the proper motions of the 22 GHz H2O masers associated with a b…
The Galactic Center Lobe Filled with Thermal Plasma
Halca Nagoshi, Yuzo Kubose, Kenta Fujisawa +6
An observational result of a radio continuum and H92 radio recombination line of the Galactic Center Lobe (GCL), using the Yamaguchi 32 m radio telescope, is reported. The obtai…
A Face-on Accretion System in High-Mass Star-Formation: Possible Dusty Infall Streams within 100 AU
Kazuhito Motogi, Tomoya Hirota, Kazuo Sorai +7
We report on interferometric observations of a face-on accretion system around the High-Mass young stellar object, G353.273+0.641. The innermost accretion system of 100 au radius w…
OISTER Optical and Near-Infrared Monitoring Observations of a Peculiar Radio-Loud Active Galactic Nucleus SDSS J110006.07+442144.3
Tomoki Morokuma, Masaomi Tanaka, Yasuyuki T. Tanaka +80
We present monitoring campaign observations at optical and near-infrared (NIR) wavelengths for a radio-loud active galactic nucleus (AGN) at z=0.840, SDSS~J110006.07+442144.3 (here…
HCN hyperfine ratio analysis of massive molecular clumps
W. J. Schap, P. J. Barnes, A. Ordonez +3
We report a new analysis protocol for HCN hyperfine data, based on the PYSPECKIT package, and results of using this new protocol to analyse a sample area of seven massive molecular…
No Microwave Flare of Sagittarius A* around the G2 Periastron Passing
Masato Tsuboi, Yoshiharu Asaki, Osamu Kameya +11
In order to explore any change caused by the G2 cloud approaching, we have monitored the flux density of Sgr A* at 22 GHz from Feb. 2013 to Aug. 2014 with a sub-array of Japanese V…
The jet and arc molecular clouds toward Westerlund 2, RCW 49, and HESS J1023-575; 12CO and 13CO (J=2-1 and J=1-0) observations with NANTEN2 and Mopra Telescope
N. Furukawa, A. Ohama, T. Fukuda +20
We have made new CO observations of two molecular clouds, which we call "jet" and "arc" clouds, toward the stellar cluster Westerlund 2 and the TeV gamma-ray source HESS J1023-575.…
Short-Term Radio Variability and Parsec-Scale Structure in a Gamma-Ray Narrow-Line Seyfert 1 Galaxy 1H 0323+342
Kiyoaki Wajima, Kenta Fujisawa, Masaaki Hayashida +3
We made simultaneous single-dish and very long baseline interferometer (VLBI) observations of a narrow-line Seyfert 1 galaxy (NLS1) 1H 0323+342, showing gamma-ray activity revealed…
The Galactic Census of High- and Medium-mass Protostars. I. Catalogues and First Results from Mopra HCO+ Maps
Peter J. Barnes, Yoshinori Yonekura, Yasuo Fukui +10
The Census of High- and Medium-mass Protostars (CHaMP) is the first large-scale, unbiased, uniform mapping survey at sub-parsec scale resolution of 90 GHz line emission from massiv…
The AMANOGAWA-2SB Galactic Plane Survey I: Data on the Galactic Equator
Takahiro Yoda, Toshihiro Handa, Kotaro Kohno +6
Using a waveguide-type sideband-separating receiver (2SB receiver) on the Tokyo-NRO 60-cm telescope (renamed the AMANOGAWA telescope), we carried out simultaneous observations in t…
Photon Dominated Regions in NGC 3603
M. Röllig, C. Kramer, C. Rajbahak +32
Aims: We aim at deriving the excitation conditions of the interstellar gas as well as the local FUV intensities in the molecular cloud surrounding NGC 3603 to get a coherent pictur…