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We report current status of the Infrared Camera and Spectrograph (IRCS) for the Subaru Telescope. IRCS is a Subaru facility instrument optimized for high-resolution images with adaptive optics (AO) and tip-tilt at 105m. IRCS consists of two parts: one is a cross-dispersed spectrograph providing mid to high spectral resolution (R=5,000020,000), the other is(More)
We present a deep K ′-band (2.12µm) imaging of 1 ′ × 1 ′ Subaru Super Deep Field (SSDF) taken with the Subaru adaptive optics (AO) system. Total integration time of 26.8 hours results in the limiting magnitude of K ′ ∼ 24.7 (5σ, 0. ′′ 2 aperture) for point sources and K ′ ∼ 23.5 (5σ, 0. ′′ 6 aperture) for galaxies, which is the deepest limit ever achieved(More)
This article presents a novel approach for readability assessment through sorting. A comparator that judges the relative readability between two texts is generated through machine learning, and a given set of texts is sorted by this comparator. Our proposal is advantageous because it solves the problem of a lack of training data, because the construction of(More)
The Fukushima Daiichi Nuclear Power Plant (NPP) 1 was severely damaged from the chain reaction of the Great East Japan Earthquake and Tsunami on 11 March 2011, and the consequent meltdown and hydrogen gas explosions. This resulted in the worst nuclear accident since the Chernobyl accident of 1986. Just as in the case of Chernobyl, emergency workers were(More)
The birth of very massive stars is not well understood, in contrast to the formation process of low-mass stars like our Sun. It is not even clear that massive stars can form as single entities; rather, they might form through the mergers of smaller ones born in tight groups. The recent claim of the discovery of a massive protostar in M17 (a nearby giant(More)
Herein we summarize the public health actions taken to mitigate exposure of the public to radiation after the Fukushima accident that occurred on 11 March 2011 in order to record valuable lessons learned for disaster preparedness. Evacuations from the radiation-affected areas and control of the distribution of various food products contributed to the(More)
We present high-resolution (R = 20000) spectroscopy of H + 3 absorption toward the luminous Galactic center sources GCS 3-2 and GC IRS 3. With the efficient wavelength coverage afforded by Subaru IRCS, six absorption lines of H + 3 have been detected in each source from 3.5 to 4.0 µm, three of which are new. In particular the 3.543 µm absorption line of the(More)
Circumstellar disks are usually formed around young stars and are intricately tied to the origin of planets (e.g., [1]). Giant planets have been considered to form via gas accretion onto rocky cores in such disks (e.g., [2]), which can successfully explain " normal " giant planets like ours. However, recent direct detections of companions with masses of a(More)
023 Protoplanetary disks are believed to be the birthplaces of planets [1]. Among them, disks which have substantial infrared excesses but reduced uxes at wavelengths < 20 µm, i.e., transitional disks [2], could be related to the early phases of planet formation [3] and are therefore particularly important for understanding how, where, and when planets(More)
We present K ′-band (2.12 µm) imaging observations of the SGR 1806–20 field taken during its very active phase in mid 2004, which reveal brightening of sources within the Chandra X-ray error circle when compared with earlier images obtained in 2002. One source brightened by more than a factor of 2, and so we consider this to be the probable infrared(More)