Since 2007, astronomers have been observing fleeting bursts of bright, energetic radio waves lasting milliseconds to microseconds in space. They call them Fast Radio Bursts (FRBs). But what produces these high-energy bursts baffles astronomers. To understand the origins of FRBs, a team of scientists led by Bunyo Hatsukade, an Assistant Professor at the University of Tokyo, probed the molecular gas of their host galaxies.
Video observations by Tomo-e Gozen have discovered 22 very fast and powerful optical flares from red dwarfs, which have been difficult to be detected. Such very fast and powerful flares are likely to be produced by instantaneous energy release of strong magnetic fields, potentially giving an impact on planetary habitability around red dwarfs.
Tomo-e Gozen carried out video observations of 60 tiny (diameter less than 100 m) near-Earth asteroids (NEAs) and successfully derived rotational periods and axial ratios of 32 NEAs. The distribution of the tiny NEAs in a diameter and rotational period (D-P) diagram is truncated around a period of 10 s. The dependence of the tangential YORP effect on the rotational period potentially explains the observed pattern in the D-P diagram.
Tomo-e Gozen and the X-ray telescope NICER on the International Space Station carried out simultaneous high-speed observations of the dwarf nova SS Cyg. Highly correlated optical and X-ray variations and optical lags ranging from 0.3 to 3.1 s were successfully detected.
November 28, 2022
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