Search Publications
Achievements of Hinode in the first eleven years
Solanki, Sami K.; Tiwari, Sanjiv K.; Reeves, Katharine K. +33 more
Hinode is Japan's third solar mission following Hinotori (1981-1982) and Yohkoh (1991-2001): it was launched on 2006 September 22 and is in operation currently. Hinode carries three instruments: the Solar Optical Telescope, the X-Ray Telescope, and the EUV Imaging Spectrometer. These instruments were built under international collaboration with th…
AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec
Hasegawa, Sunao; Onaka, Takashi; Usui, Fumihiko +1 more
Knowledge of water in the solar system is important for the understanding of a wide range of evolutionary processes and the thermal history of the solar system. To explore the existence of water in the solar system, it is indispensable to investigate hydrated minerals and/or water ice on asteroids. These water-related materials show absorption fea…
Boötes. IV. A new Milky Way satellite discovered in the Subaru Hyper Suprime-Cam Survey and implications for the missing satellite problem
Strauss, Michael A.; Wang, Shiang-Yu; Ishigaki, Miho N. +13 more
We report on the discovery of a new Milky Way (MW) satellite in Boötes based on data from the ongoing Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP). This satellite, named Boötes IV, is the third ultra-faint dwarf that we have discovered in the HSC-SSP. We have identified a statistically significant (32.3σ) overdensity of stars with charac…
Environmental impacts on molecular gas in protocluster galaxies at z ∼ 2
Tamura, Yoichi; Kohno, Kotaro; Suzuki, Tomoko L. +12 more
We present the results from ALMA CO(3-2) observations of 66 Hα-selected galaxies in three protoclusters around radio galaxies: PKS 1138-262 (z = 2.16), USS 1558-003 (z = 2.53), and 4C 23.56 (z = 2.49). The pointing areas have an overdensity of ∼100 compared to the mean surface number density of galaxies in field environments. We detect the CO emis…
Detections of [O III] 88 µm in two quasars in the reionization epoch
Inoue, Akio K.; Hashimoto, Takuya; Tamura, Yoichi +3 more
We report on detections with the Atacama Large Millimeter/sub-millimeter Array of the far-infrared [O III] 88 µm line and the underlying dust continuum in two quasars in the reionization epoch, J205406.48-000514.8 (hereafter J2054-0005) at z = 6.0391 ± 0.0002 and J231038.88+185519.7 (hereafter J2310+1855) at z = 6.0035 ± 0.0007. The [O III] …
Three Z Camelopardalis-type dwarf novae exhibiting IW Andromedae-type phenomenon
Kato, Taichi
I found that V507 Cyg, IM Eri, and FY Vul are Z Cam-type dwarf novae and they showed sequences of standstill terminated by brightening, in contrast to fading as ordinary Z Cam stars do, followed by damping oscillation. These sequences are characteristic to IW And-type objects (also known as anomalous Z Cam stars). New additions to the IW And-type …
CO multi-line imaging of nearby galaxies (COMING). IV. Overview of the project
Nakanishi, Hiroyuki; Seta, Masumichi; Salak, Dragan +36 more
Observations of the molecular gas in galaxies are vital to understand the evolution and star-forming histories of galaxies. However, galaxies with molecular gas maps of their whole discs at sufficient resolution to distinguish galactic structures are severely lacking. Millimeter-wavelength studies at a high angular resolution across multiple lines…
On the different levels of dust attenuation to nebular and stellar light in star-forming galaxies
Yamamura, Issei; Koyama, Yusei; Kodama, Tadayuki +2 more
As a science verification study of the newly released AKARI/FIS Faint Source Catalog ver. 1, this paper discusses the different levels of dust attenuation toward stellar light and nebular emission lines within local star-forming galaxies at 0.02 < z < 0.10. By constructing an updated version of the AKARI-SDSS-GALEX matched galaxy catalog (wi…
The W-subtype active contact binary PZ UMa with a possible more massive tertiary component
Soonthornthum, Boonrucksar; Zhou, Xiao
Two sets of multiple-color (B, V, RC, IC) light curves of PZ UMa were observed independently with the 2.4 m telescope at the Thai National Observatory and the 1 m telescope at Yunnan Observatories. The light curves were analyzed with the Wilson-Devinney program and the two sets of light curves produced consistent results, whi…
The Herschel-PACS North Ecliptic Pole Survey
Goto, Tomotsugu; Kim, Seong Jin; Pearson, Chris +9 more
A detailed analysis of Herschel/Photoconductor Array Camera and Spectrometer (PACS) observations at the North Ecliptic Pole is presented. High-quality maps, covering an area of 0.44 deg2, are produced and then used to derive potential candidate source lists. A rigorous quality-control pipeline has been used to create final legacy catalo…