The research team led by Satoru Iguchi, Associate Professor of NAOJ, succeeded in observing a very close binary black hole in the center of 3C66B (a giant elliptical galaxy within the cluster A347) just before its black hole merger.
It was estimated that these two black holes could be merged in approximately 500 years. The observation was conducted with
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The Universe’s Secret Harvest: ALMA Sheds Light on “the Cosmic Grapes”
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Discovery of Protoplanetary Disk Caught in Explosion Driven by Stellar Jet
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Development of Total Power GPU Spectrometer was approved by ALMA Board
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