Observation by Robin Leadbeater: Impending Supermassive Black Hole Merger...

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Robin Leadbeater


Robin Leadbeater


2022 Feb 07 - 00:38


2022 Feb 07 - 20:56

  • ALPY 200 spectrograph
  • ATIK 428 ex camera
  • Celestron C11 SCT 280mm aperture f5.5

3 hours


Wigton Cumbria

Target name

NSV 6690/SDSSJ1430+2303/2MASS J14301603+2303445


Impending Supermassive Black Hole Merger ?

About this image

According to the recent ArXiv paper "Tick-Tock: The Imminent Merger of a Supermassive Black Hole Binary Ning Jian et all" published 2022-01-27  the mag 17 Seyfert galaxy SDSSJ1430+2303 (identified as suspect variable NSV 6690 in VSX) is home to a supermassive black hole binary which may merge in the next 3 years and possibly sooner, perhaps within 100-300 days based on the rapid rate of decay of its orbit. If it does this will be the first such event to be observed. My low resolution spectrum (blue) is overlaid on the last spectrum in the paper dated 2022-01-03 (grey).  The wavelength scale has been corrected for the 0.081 redshift, to show the rest wavelength. The spectrum shows a very broad H alpha emission with velocities up to +-12000km/s from the region of the closely orbiting black hole pair.

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