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Cosmic star-formation history and black hole accretion history inferred from the JWST mid-infrared source counts
Seong Jin Kim, Tomotsugu Goto, Chih-Teng Ling +7
With the advent of the James Webb Space Telescope (JWST), extra-galactic source count studies were conducted down to sub-microJy in the mid-infrared (MIR), which is several tens of…
The true fraction of repeating fast radio bursts revealed through CHIME source count evolution
Shotaro Yamasaki, Tomotsugu Goto, Chih-Teng Ling +1
Fast Radio Bursts (FRBs) are classified into repeaters and non-repeaters, with only a few percent of the observed FRB population from the Canadian Hydrogen Intensity Mapping Experi…
Machine Learning Classification of Repeating FRBs from FRB121102
Bjorn Jasper R. Raquel, Tetsuya Hashimoto, Tomotsugu Goto +5
Fast Radio Bursts (FRBs) are mysterious bursts in the millisecond timescale at radio wavelengths. Currently, there is little understanding about the classification of repeating FRB…
A T-Dwarf Candidate from JWST Early Release NIRCam data
Po-Ya Wang, Tomotsugu Goto, Simon C. -C. Ho +6
We present a distant Ttype brown dwarf candidate at kpc discovered in the Cosmic Evolution Early Release Science (CEERS) fields by James Webb Space Telescope (JWST…
Quasar Luminosity Function at z = 7
Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa +41
We present the quasar luminosity function (LF) at , measured with 35 spectroscopically confirmed quasars at . The sample of 22 quasars from the Subaru High-…
Future Constraints on Dark Matter with Gravitationally Lensed Fast Radio Bursts Detected by BURSTT
Simon C. -C. Ho, Tetsuya Hashimoto, Tomotsugu Goto +4
Understanding dark matter is one of the most urgent questions in modern physics. A very interesting candidate is primordial black holes (PBHs; Carr2016). For the mass ranges of $<…
Upper limits on transmitter rate of extragalactic civilizations placed by Breakthrough Listen observations
Yuri Uno, Tetsuya Hashimoto, Tomotsugu Goto +3
The Search for Extra-Terrestrial Intelligence (SETI) has been conducted for over sixty years, yet no technosignatures have been identified. Previous studies have focused on stars i…
Classifying a frequently repeating fast radio burst, FRB 20201124A, with unsupervised machine learning
Bo Han Chen, Tetsuya Hashimoto, Tomotsugu Goto +5
Fast radio bursts (FRBs) are astronomical transients with millisecond timescales. Although most of the FRBs are not observed to repeat, a few of them are detected to repeat more th…
Infrared galaxies detected by the Atacama Cosmology Telescope
Ece Kilerci, Tetsuya Hashimoto, Tomotsugu Goto +4
We report on 167 infrared (IR) galaxies selected by AKARI and IRAS and detected in the Atacama Cosmology Telescope (ACT) Data Release 5 (DR5) sky maps at the 98, 150 and 220 GHz fr…