Taisuke Onishi

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This study investigated the influence of mound-building termites on soil particle dynamics on the land surface and in soil-forming processes by examining the amount of soil particles in mound structures of Macrotermes bellicosus in a highly weathered Ultisol of tropical savanna. Soil particle turnover via the mounds was estimated using particle stock data(More)
We present ∼1000 new candidate Young Stellar Objects (YSOs) in the Large Magellanic Cloud selected from Spitzer Space Telescope data, as part of the Surveying the Agents of a Galaxy’s Evolution (SAGE) Legacy program. The YSOs, detected by their excess infrared (IR) emission, represent early stages of evolution, still surrounded by disks and/or infalling(More)
The integrated spectral energy distributions (SED) of the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) appear significantly flatter than expected from dust models based on their far-infrared and radio emission. The still unexplained origin of this millimetre excess is investigated here using the Planck data. The integrated SED of the two(More)
It is generally assumed that the flux of cosmic-rays observed at the top of the Earth’s atmosphere is representative of the flux in the Galaxy at large. The advent of high sensitivity, high resolution γ-ray detectors, together with a knowledge of the distribution of the atomic hydrogen and especially of the molecular hydrogen in the Galaxy on sub-degree(More)
Molecular clouds around a run-away O star ζ Oph have been surveyed with NANTEN telescope and their streaming motion caused by ζ Oph has been detected. The earliest (O9.5V) member of Sco OB2 association, ζ Oph, is a runaway star rapidly moving accompanied by an HII region S27. We detected 2 major filamentary cloud complexes; L156 complex is lying across(More)
The ‘Carina Flare’ supershell, GSH 287+04-17, is a molecular supershell originally discovered in CO(J=1-0) with the NANTEN 4m telescope. We present the first study of the shell’s atomic ISM, using Hi 21 cm line data from the Parkes 64m telescope Southern Galactic Plane Survey. The data reveal a gently expanding, ∼ 230 × 360 pc Hi supershell that shows(More)
We analyze the conditions for detection of CO(1-0) emission in the Large Magellanic Cloud (LMC), using the recently completed second NANTEN CO survey. In particular, we investigate correlations between CO integrated intensity and H I integrated intensity, peak brightness temperature, and line width at a resolution of 2.6 (∼40 pc). We find that significant H(More)
The Magellanic Mopra Assessment (MAGMA) is a high angular resolution 12CO (J = 1 → 0) mapping survey of giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud using the Mopra Telescope. Here we report on the basic physical properties of 125 GMCs in the LMC that have been surveyed to date. The observed clouds exhibit(More)
The HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) of the Magellanic Clouds will use dust emission to investigate the life cycle of matter in both the Large and Small Magellanic Clouds (LMC and SMC). Using the Herschel Space Observatory’s PACS and SPIRE photometry cameras, we imaged a 2◦ × 8◦ strip through the LMC, at a position angle of(More)
Context. We present the physical and evolutionary properties of prestellar and protostellar clumps in the Herschel Infrared GALactic plane survey (Hi-GAL) in two large areas centered in the Galactic plane and covering the tips of the long Galactic bar at the intersection with the spiral arms. The areas fall in the longitude ranges 19 < l < 33 and 340 < l <(More)