Millimetre-wave emission from an intermediate-mass black hole candidate in the Milky Way

@article{Oka2017MillimetrewaveEF,
  title={Millimetre-wave emission from an intermediate-mass black hole candidate in the Milky Way},
  author={Tomoharu Oka and Shiho Tsujimoto and Yuhei Iwata and Mariko Nomura and Shunya Takekawa},
  journal={Nature Astronomy},
  year={2017},
  volume={1},
  pages={709-712}
}
It is widely accepted that black holes with masses greater than a million solar masses (M⊙) lurk at the centres of massive galaxies. The origins of such ‘supermassive’ black holes (SMBHs) remain unknown1, although those of stellar-mass black holes are well understood. One possible scenario is that intermediate-mass black holes (IMBHs), which are formed by the runaway coalescence of stars in young compact star clusters2, merge at the centre of a galaxy to form a SMBH3. Although many candidates… 
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