4.3k citations · 4.9k across the 8 of their papers we have counts for
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astro-ph.GA2019★ 4.3k cited
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
The Event Horizon Telescope Collaboration
When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon. To…
astro-ph.HE2019★ 1 cited
Resolving the cosmic X-ray background with a next-generation high-energy X-ray observatory
R. C. Hickox, F. Civano, D. R. Ballantyne +16
The cosmic X-ray background (CXB), which peaks at an energy of ~30 keV, is produced primarily by emission from accreting supermassive black holes (SMBHs). The CXB therefore serves…