842 citations · 1.6k across the 27 of their papers we have counts for
27 papers
Development of a near-infrared wide-field integral field unit by ultra-precision diamond cutting
Kosuke Kushibiki, Shinobu Ozaki, Masahiro Takeda +17
Integral Field Spectroscopy (IFS) is an observational method to obtain spatially resolved spectra over a specific field of view (FoV) in a single exposure. In recent years, near-in…
Multiple emission lines of H emitters at from the broad and medium-band photometry in the ZFOURGE Survey
Nuo Chen, Kentaro Motohara, Lee R. Spitler +8
We present a multiple emission lines study of 1300 H emitters (HAEs) at in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample…
SN 2020uem: A Possible Thermonuclear Explosion within A Dense Circumstellar Medium (I) The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy
Kohki Uno, Keiichi Maeda, Takashi Nagao +18
We have performed intensive follow-up observations of a Type IIn/Ia-CSM SN (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the…
Video Observations of Tiny Near-Earth Objects with Tomo-e Gozen
Jin Beniyama, Shigeyuki Sako, Ryou Ohsawa +20
We report the results of video observations of tiny (diameter less than 100 m) near-Earth objects (NEOs) with Tomo-e Gozen on the Kiso 105 cm Schmidt telescope. A rotational period…
Deep simultaneous limits on optical emission from FRB 20190520B by 24.4 fps observations with Tomo-e Gozen
Yuu Niino, Mamoru Doi, Shigeyuki Sako +16
We conduct 24.4~fps optical observations of repeating Fast Radio Burst (FRB) 20190520B using Tomo-e Gozen, a high-speed CMOS camera mounted on the Kiso 105-cm Schmidt telescope, si…
EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension
Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima +42
The primordial He abundance is a powerful probe of cosmology. Currently, is best determined by observations of metal-poor galaxies, while there are on…
Discovery of the Fastest Early Optical Emission from Overluminous SN Ia 2020hvf: A Thermonuclear Explosion within a Dense Circumstellar Environment
Ji-an Jiang, Keiichi Maeda, Miho Kawabata +28
In this Letter we report a discovery of a prominent flash of a peculiar overluminous Type Ia supernova, SN 2020hvf, in about 5 hours of the supernova explosion by the first wide-fi…
Relationship between Radar Cross Section and Optical Magnitude based on Radar and Optical Simultaneous Observations of Faint Meteors
Ryou Ohsawa, Akira Hirota, Kohei Morita +40
Radar and optical simultaneous observations of meteors are important to understand the size distribution of the interplanetary dust. However, faint meteors detected by high power l…
Environmental impact on star-forming galaxies in a cluster during course of galaxy accretion
Tetsuro Asano, Tadayuki Kodama, Kentaro Motohara +18
Galaxies change their properties as they assemble into clusters. In order to understand the physics behind that, we need to go back in time and observe directly what is occurring i…
An optical search for transients lasting a few seconds
Michael W. Richmond, Masaomi Tanaka, Tomoki Morokuma +37
Using a prototype of the Tomo-e Gozen wide-field CMOS mosaic camera, we acquire wide-field optical images at a cadence of 2 Hz and search them for transient sources of duration 1.5…
New constraint on the atmosphere of (50000) Quaoar from a stellar occultation
Ko Arimatsu, Ryou Ohsawa, George L. Hashimoto +35
We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset w…
Ground-based Pa Narrow-band Imaging of Local Luminous Infrared Galaxies II: Bulge Structure And Star Formation Activity
Ken Tateuchi, Kentaro Motohara, Masahiro Konishi +8
We present properties of two types of bulges (classical- and pseudo- bulges) in 20 luminous infrared galaxies (LIRGs) observed in the near infrared of the , and 1.91m n…
Luminosity Function of Faint Sporadic Meteors measured with a Wide-Field CMOS mosaic camera Tomo-e PM
Ryou Ohsawa, Shigeyuki Sako, Yuki Sarugaku +34
Imaging observations of faint meteors were carried out on April 11 and 14, 2016 with a wide-field CMOS mosaic camera, Tomo-e PM, mounted on the 105-cm Schmidt telescope at Kiso Obs…
The rotation period distributions of 4--10 Myr T Tauri stars in Orion OB1: New constraints on pre-main-sequence angular momentum evolution
Md. Tanveer Karim, Keivan G. Stassun, Cesar Briceno +15
Most existing studies of the angular momentum evolution of young stellar populations have focused on the youngest (1-3 Myr) T Tauri stars. In contrast, the angular momentum distrib…
Concurrent Formation of Carbon and Silicate Dust in Nova V1280 Sco
Itsuki Sakon, Shigeyuki Sako, Takashi Onaka +12
We present infrared multi-epoch observations of the dust forming nova V1280 Sco over 2000 days from the outburst. The temporal evolution of the infrared spectral energy distr…
ANIR : Atacama Near-Infrared Camera for the 1.0-m miniTAO Telescope
Masahiro Konishi, Kentaro Motohara, Ken Tateuchi +35
We have developed a near-infrared camera called ANIR (Atacama Near-InfraRed camera) for the University of Tokyo Atacama Observatory 1.0m telescope (miniTAO) installed at the summit…
Multi-wavelength observations of the black widow pulsar 2FGL J2339.6-0532 with OISTER and Suzaku
Yoichi Yatsu, Jun Kataoka, Yosuke Takahashi +41
Multi-wavelength observations of the black-widow binary system 2FGL J2339.6-0532 are reported. The Fermi gamma-ray source 2FGL J2339.6-0532 was recently categorized as a black wido…
Ground-based Pa Narrow-band Imaging of Local Luminous Infrared Galaxies I: Star Formation Rates and Surface Densities
Ken Tateuchi, Masahiro Konishi, Kentaro Motohara +33
Luminous infrared galaxies (LIRGs) are enshrouded by a large amount of dust, produced by their active star formation, and it is difficult to measure their activity in the optical w…
AKARI Infrared Camera Survey of the Large Magellanic Cloud. I. Point Source Catalog
Daisuke Kato, Yoshifusa Ita, Takashi Onaka +10
We present a near- to mid-infrared point source catalog of 5 photometric bands at 3.2, 7, 11, 15 and 24 um for a 10 deg2 area of the Large Magellanic Cloud (LMC) obtained with the…
Widely Extended [OIII] 88 um Line Emission around the 30 Doradus Region Revealed with AKARI FIS-FTS
Mitsunobu Kawada, Ai Takahashi, Akiko Yasuda +7
We present the distribution map of the far-infrared [OIII] 88um line emission around the 30 Doradus (30 Dor) region in the Large Magellanic Cloud obtained with the Fourier Transfor…
Calibration of the AKARI Far-Infrared Imaging Fourier Transform Spectrometer
Noriko Murakami, Mitsunobu Kawada, Hidenori Takahashi +16
The Far-Infrared Surveyor (FIS) onboard the AKARI satellite has a spectroscopic capability provided by a Fourier transform spectrometer (FIS-FTS). FIS-FTS is the first space-borne…
Properties of active galactic star-forming regions probed by imaging spectroscopy with the Fourier transform spectrometer (FTS) onboard AKARI
Yoko Okada, Mitsunobu Kawada, Noriko Murakami +8
We investigate the structure of the interstellar medium (ISM) and identify the location of possible embedded excitation sources from far-infrared (FIR) line and mid-infrared contin…
Performance of the Imaging Fourier Transform Spectrometer with Photoconductive Detector Arrays: An Application for the AKARI Far-Infrared Instrument
Mitsunobu Kawada, Hidenori Takahashi, Noriko Murakami +10
We have developed an imaging Fourier transform spectrometer (FTS) for space-based far-infrared astronomical observations. The FTS employs a newly developed photoconductive detector…
AKARI IRC survey of the Large Magellanic Cloud: Outline of the survey and initial results
Yoshifusa Ita, Takashi Onaka, Daisuke Kato +13
We observed an area of 10 deg^2 of the Large Magellanic Cloud using the Infrared Camera on board AKARI. The observations were carried out using five imaging filters (3, 7, 11, 15,…