67 citations · 438 across the 27 of their papers we have counts for
28 papers
Effect of galaxy mergers on dust masses
W. J. Pearson, M. Romano, K. Małek +7
Dust mass (M) is one of the key physical properties of galaxies that track the cold interstellar medium. However, the M in merging galaxies is poorly understood.…
Tracing Obscured AGN Contribution and Number Fraction Across 0 < z < 6 with JWST
Angel Rodriguez Barbosa, Tomotsugu Goto, Daryl Joe D. Santos +8
Active galactic nuclei (AGN) are key drivers of galaxy evolution, yet many remain undetected in ultraviolet and optical surveys due to heavy dust obscuration. In these systems, abs…
Confronting a Thin Disk-Wind Launching Mechanism of Broad-Line Emission in AGN with GRAVITY Observations of Quasar 3C 273
Kirk Long, Jason Dexter, Yixian Cao +7
Quasars show a remarkable degree of atomic emission line-broadening, an observational feature which, in conjunction with a radial distance estimate for this emission from the nucle…
Towards measuring supermassive black hole masses with interferometric observations of the dust continuum
GRAVITY Collaboration, A. Amorim, G. Bourdarot +40
This work focuses on active galactic nuclei (AGNs), and the relation between the sizes of the hot dust continuum and the broad-line region (BLR). We find that the continuum size me…
Constraining the Hubble constant and its lower limit from the proper motion of extragalactic radio jets
Tiger Yu-Yang Hsiao, Tomotsugu Goto, Tetsuya Hashimoto +11
The Hubble constant () is a measurement to describe the expansion rate of the Universe in the current era. However, there is a discrepancy between the measurements fr…
Can luminous Lyman alpha emitters at 5.7 and 6.6 suppress star formation?
Daryl Joe D. Santos, Tomotsugu Goto, Tetsuya Hashimoto +5
Addressing how strong UV radiation affects galaxy formation is central to understanding their evolution. The quenching of star formation via strong UV radiation (from starbursts or…
ALMA [O III] and [C II] Detections of A1689-zD1 at
Yi Hang Valerie Wong, Poya Wang, Tetsuya Hashimoto +10
A1689-zD1 is one of the most distant galaxies, discovered with the aid of gravitational lensing, providing us with an important opportunity to study galaxy formation in the very ea…
Energy functions of fast radio bursts derived from the first CHIME/FRB catalogue
Tetsuya Hashimoto, Tomotsugu Goto, Bo Han Chen +9
Fast radio bursts (FRBs) are mysterious millisecond pulses in radio, most of which originate from distant galaxies. Revealing the origin of FRBs is becoming central in astronomy. T…
Upper limits on Einstein's weak equivalence principle placed by uncertainties of dispersion measures of fast radio bursts
Tetsuya Hashimoto, Tomotsugu Goto, Daryl Joe D. Santos +7
Fast radio bursts (FRBs) are astronomical transients with millisecond timescales occurring at cosmological distances. The observed time lag between different energies of each FRB i…
Constraining violations of the Weak Equivalence Principle Using CHIME FRBs
Kaustubha Sen, Tetsuya Hashimoto, Tomotsugu Goto +7
Einstein's General Relativity (GR) is the basis of modern astronomy and astrophysics. Testing the validity of basic assumptions of GR is important. In this work, we test a possible…
Uncloaking hidden repeating fast radio bursts with unsupervised machine learning
Bo Han Chen, Tetsuya Hashimoto, Tomotsugu Goto +5
The origins of fast radio bursts (FRBs), astronomical transients with millisecond timescales, remain unknown. One of the difficulties stems from the possibility that observed FRBs…
The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP Wide field
Eunbin Kim, Ho Seong Hwang, Woong-Seob Jeong +19
We study the galaxy merger fraction and its dependence on star formation mode in the5.4 square degrees of the North Ecliptic Pole-Wide field. We select 6352 galaxies withAKARI 9μm…
Environmental Effects on AGN activity via Extinction-free Mid-Infrared Census
Daryl Joe D. Santos, Tomotsugu Goto, Seong Jin Kim +20
How does the environment affect active galactic nucleus (AGN) activity? We investigated this question in an extinction-free way, by selecting 1120 infrared galaxies in the …
Optically-detected galaxy cluster candidates in the North Ecliptic Pole field based on photometric redshift from Subaru Hyper Suprime-Cam
T. -C. Huang, H. Matsuhara, T. Goto +23
Galaxy clusters provide an excellent probe in various research fields in astrophysics and cosmology. However, the number of galaxy clusters detected so far in the North Ecl…
A Dyson Sphere around a black hole
Tiger Yu-Yang Hsiao, Tomotsugu Goto, Tetsuya Hashimoto +8
The search for extraterrestrial intelligence (SETI) has been conducted for nearly 60 years. A Dyson Sphere, a spherical structure that surrounds a star and transports its radiative…
Investigative Study on Preprint Journal Club as an Effective Method of Teaching Latest Knowledge in Astronomy
Daryl Joe D. Santos, Tomotsugu Goto, Ting-Yi Lu +5
As recent advancements in physics and astronomy rapidly rewrite textbooks, there is a growing need in keeping abreast of the latest knowledge in these fields. Reading preprints is…
Revealing the cosmic reionisation history with fast radio bursts in the era of Square Kilometre Array
Tetsuya Hashimoto, Tomotsugu Goto, Ting-Yi Lu +7
Revealing the cosmic reionisation history is at the frontier of extragalactic astronomy. The power spectrum of the cosmic microwave background (CMB) polarisation can be used to con…
An Active Galactic Nucleus Recognition Model based on Deep Neural Network
Bo Han Chen, Tomotsugu Goto, Seong Jin Kim +21
To understand the cosmic accretion history of supermassive black holes, separating the radiation from active galactic nuclei (AGNs) and star-forming galaxies (SFGs) is critical. Ho…
Photometric Redshifts in the North Ecliptic Pole Wide Field based on a Deep Optical Survey with Hyper Suprime-Cam
Simon C. -C. Ho, Tomotsugu Goto, Nagisa Oi +13
The space infrared telescope has performed near- to mid-infrared (MIR) observations on the North Ecliptic Pole Wide (NEPW) field (5.4 deg) for about one year. t…
Identification of AKARI infrared sources by Deep HSC Optical Survey: Construction of New Band-Merged Catalogue in the NEP-Wide field
Seong Jin Kim, Nagisa Oi, Tomotsugu Goto +21
The north ecliptic pole (NEP) field is a natural deep field location for many satellite observations. It has been targeted manytimes since it was surveyed by the AKARI space telesc…
No redshift evolution of non-repeating fast radio-burst rates
Tetsuya Hashimoto, Tomotsugu Goto, Alvina Y. L. On +6
Fast radio bursts (FRBs) are millisecond transients of unknown origin(s) occurring at cosmological distances. Here we, for the first time, show time-integrated-luminosity functions…
CFHT MegaPrime/MegaCam -band source catalogue of the North Ecliptic Pole Wide field
T. -C. Huang, H. Matsuhara, T. Goto +10
The infrared (IR) space telescope conducted two surveys (Deep and Wide) in the North Ecliptic Pole (NEP) field to find more than 100,000 IR sources using its Infrared Camer…
Fast radio bursts to be detected with the Square Kilometre Array
Tetsuya Hashimoto, Tomotsugu Goto, Alvina Y. L. On +6
Fast radio bursts (FRBs) are mysterious extragalactic radio signals. Revealing their origin is one of the central foci in modern astronomy. Previous studies suggest that occurrence…
Far-infrared star-formation rates of six GRB host galaxies with ALMA
Tiger Yu-Yang Hsiao, Tetsuya Hashimoto, Jia-Yuan Chang +7
Gamma-Ray Bursts (GRBs) can be a promising tracer of cosmic star-formation rate history (CSFRH). In order to reveal the CSFRH using GRBs, it is important to understand whether they…