Z45: A New 45-GHz Band Dual-Polarization HEMT Receiver for the NRO 45-m Radio Telescope

@article{Nakamura2015Z45AN,
  title={Z45: A New 45-GHz Band Dual-Polarization HEMT Receiver for the NRO 45-m Radio Telescope},
  author={Fumitaka Nakamura and Hideo Ogawa and Yoshinori Yonekura and K. Kimura and Nozomi Okada and Minato Kozu and Yutaka Hasegawa and Kazuki Tokuda and T. Ochiai and Izumi Mizuno and Kazuhito Dobashi and Tomomi Shimoikura and Seiji Kameno and Kotomi Taniguchi and Hiroko Shinnaga and Shuro Takano and Ryohei Kawabe and Taku Nakajima and Daisuke Iono and Nario Kuno and Toshikazu Onishi and Munetake Momose and Satoshi Yamamoto},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
  year={2015}
}
We developed a dual-linear-polarization HEMT (High Electron Mobility Transistor) amplifier receiver system of the 45-GHz band (hereafter Z45), and installed it in the Nobeyama 45-m radio telescope. The receiver system is designed to conduct polarization observations by taking the cross correlation of two linearly-polarized components, from which we process full-Stokes spectroscopy. We aim to measure the magnetic field strength through the Zeeman effect of the emission line of CCS ($J_N=4_3-3_2… 
A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope
A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope (TMRT) has been developed, and it uses the independently-developed key microwave and millimeter-wave components operating from 35
An International Survey of Front-end Receivers and Observing Performance of Telescopes for Radio Astronomy
This paper presents a survey of microwave front-end receivers installed at radio telescopes throughout the World. This unprecedented analysis was conducted as part of a review of front-end
Spectral Tomography for the Line-of-sight Structures of the Taurus Molecular Cloud 1
We clarify the line-of-sight structure of the Taurus Molecular Cloud 1 (TMC-1) on the basis of the CCS($J_N=4_3-3_2$) and HC$_3$N($J=5-4$) spectral data observed at a very high velocity resolution
First clear detection of the CCS Zeeman splitting toward the pre-stellar core, Taurus Molecular Cloud 1
We report the first clear detection of the Zeeman splitting of a CCS emission line at 45 GHz toward the nearby pre-stellar dense filament, Taurus Molecular Cloud 1 (TMC-1). We observed HC$_3$N
Chemical Diversity in Three Massive Young Stellar Objects Associated with 6.7 GHz CH3OH Masers
We have carried out observations in the 42$-$46 and 82$-$103 GHz bands with the Nobeyama 45-m radio telescope, and in the 338.2$-$339.2 and 348.45$-$349.45 GHz bands with the ASTE 10-m telescope
Observations of Cyanopolyynes toward Four High-Mass Star-Forming Regions Containing Hot Cores
We carried out line survey observations at the 26-30 GHz band toward the four high-mass star-forming regions containing hot cores, G10.30-0.15, G12.89+0.49, G16.86-2.16, and G28.28-0.36, with the
Discovery of CCS Velocity-coherent Substructures in the Taurus Molecular Cloud 1
We present the results of mapping observations toward a nearby starless filamentary cloud, the Taurus Molecular Cloud 1 (TMC-1), in the CCS(JN=43-32, 45.379033 GHz) emission line, using the Nobeyama
Discovery of SiO Masers in the “Water Fountain” Source IRAS 16552−3050
In this paper, we report new detections of SiO v = 1 and v = 2 J = 1 → 0 masers in the “water fountain” source IRAS 16552−3050, which was observed with the Nobeyama 45 m telescope during 2021
Survey Observations to Study Chemical Evolution from High-mass Starless Cores to High-mass Protostellar Objects I: HC3N and HC5N
We carried out survey observations of HC$_{3}$N and HC$_{5}$N in the 42$-$45 GHz band toward 17 high-mass starless cores (HMSCs) and 35 high-mass protostellar objects (HMPOs) with the Nobeyama 45 m
Discovery of Infalling Motion with Rotation of the Cluster-Forming Clump S235AB and Its Implication to the Clump Structures
We report the discovery of infalling motion with rotation of S235AB the massive cluster-forming clump (~10^3 Mo) in the S235 region. Our C18O observations with the 45m telescope at the Nobeyama Radio
...
1
2
...

References

SHOWING 1-10 OF 38 REFERENCES
A Millimeter Polarimeter for the 45-m Telescope at Nobeyama
A New 100-GHz Band Front-End System with a Waveguide-Type Dual-Polarization Sideband-Separating SIS Receiver for the NRO 45-m Radio Telescope
We developed a waveguide-type dual-polarization sideband-separating SIS receiver system of the 100GHz band for the 45-m radio telescope at the Nobeyama Radio Observatory, Japan. This receiver is
A New 100-GHz Band Two-Beam Sideband-Separating SIS Receiver for Z-Machine on the NRO 45-m Radio Telescope
We have developed a two-beam waveguide-type dual-polarization sideband-separating SIS receiver system in the 100-GHz band for z-machine on the 45-m radio telescope at the Nobeyama Radio Observatory.
Cryogenic 36-45 GHz InP Low-Noise Amplifier MMIC's with Improved Noise Temperature by Eliminating Parasitic Parallel-Plate Modes
This paper describes cryogenic 36–45 GHz InP low-noise amplifier monolithic microwave integrated circuits (MMIC’s) with an improved noise temperature by eliminating parasitic parallel-plate resonance
Software Polarization Spectrometer "PolariS"
TLDR
A software-based polarization spectrometer to acquire full-Stokes spectra with a very high spectral resolution of 61 Hz, which offers excellent performances in linearity, dynamic range, sensitivity, bandpass flatness and stability.
Development of Double-Ridged Wavegide Orthomode Transducer for the 2 MM Band
This paper describes the design and development of the 2 mm band orthomode transducer (OMT) for the Band 4 cartridge receivers of the Atacama Large Millimeter/Submillimeter Array (ALMA). The OMT
Full polarization study of SiO masers at 86 GHz
Aims. We study the polarization of the SiO maser emission in a representative sample of evolved stars in order to derive an estimate of the strength of the magnetic field, and thus determine the
DISCOVERY OF THE ZEEMAN EFFECT IN THE 44 GHz CLASS I METHANOL (CH3OH) MASER LINE
We report the discovery of the Zeeman effect in the 44?GHz Class I methanol (CH3OH) maser line. The observations were carried out with 22 antennas of the Expanded Very Large Array toward a
Digital Spectro-Correlator System for the Atacama Compact Array of the Atacama Large Millimeter/submillimeter Array
We have developed an FX-architecture digital spectro-correlator for the Atacama Compact Array (ACA) of the Atacama Large Millimeter/submillimeter Array. The correlator is able to simultaneously
Mueller Matrix Parameters for Radio Telescopes and Their Observational Determination
Modern digital cross-correlators permit the simultaneous measurement of all four Stokes parameters. However, the results must be calibrated to correct for the polarization transfer function of the
...
1
2
3
4
...