Junji Inatani

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We present observations of the P1–P0 fine structure transition of atomic carbon [CI], the J=3–2 transition of CO, as well as of the J=1–0 transitions of CO and CO toward DR15, an HII region associated with two mid-infrared dark clouds (IRDCs). The CO and CO J=1–0 emissions closely follow the dark patches seen in optical wavelength, showing two(More)
A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up to ∼15 km. To develop and test this capability, a Long Baseline Campaign (LBC) was carried out from 2014 September to late November, culminating in(More)
We have designed the central cone for the subreflector of the ACA 7-m antenna. The cone is curved-shape and 53 mm in diameter, which is the maximum size to the extent that the cone does not affect the efficiency of the antenna even at the highest frequency of ALMA, 950 GHz. We have also optimized the profile parameters of the cone in consideration of(More)
We measured emissivity of sample presenting panel of ALMA antenna using Band-10 heterodyne SIS receiver as antenna switching balanced radiometer with 8 GHz instantaneous bandwidth. Receiver noise temperature measured with 80 K/300 K antenna loads was ≈560 K (DSB). Emissivity of the surface is detected at LO frequency about 840 GHz via the imbalance of the(More)
Large scale mapping observations of the P1– P0 fine structure transition of atomic carbon (CI, 492 GHz) and the J=3-2 transition of CO (346 GHz) toward the Orion A molecular cloud have been carried out with the Mt. Fuji submillimeter-wave telescope. The observations cover 9 square degrees, and include the Orion nebula M42 and the L1641 dark cloud complex.(More)
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