Robert Scherrer on Muck Rack

Robert Scherrer

Nashville
As seen in: Gizmodo, The Wall Street Journal, Scientific American, The Conversation, International Business Times (U.K.), National Review, The Epoch Times, Inside Higher Ed, EarthSky, Physical Review B and
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Articles

What if a small black hole devoured you? Original

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By Robert Scherrer
| EarthSky
Space EarthSky isn’t powered by billionaires. We’re powered by you. Support EarthSky’s 2025 Donation Campaign and help keep science accessible. What would happen if a small black hole from the early universe passed through a human body? That’s what Robert Scherrer of Vanderbilt University wanted to know. Scherrer said it would depend on the size of the black hole. However, a supersonic shockwave could blast through tissue like a bullet. And tidal forces could tear apart cells.
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Gravitational effects of a small primordial black hole passing through the human body

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By Robert Scherrer, Paul Frampton, K. M. Belotsky
| World Scientific
1. Introduction The detection of gravitational radiation from merging black holes1 as well as the direct imaging of M87*2 and Sgr A*3 has led to a significant resurgence of interest in black hole physics.
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Big bang nucleosynthesis with rapidly varying $G$

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By Anish Giri, Robert Scherrer
| Physical Review B
We examine big bang nucleosynthesis (BBN) in models with a time-varying gravitational constant G, when this time variation is rapid on the scale of the expansion rate H, i.e, G˙/G≫H. Such models can arise naturally in the context of scalar-tensor theories of gravity and result in additional terms in the Friedman equation. We examine two representative models: a step-function evolution for G and a rapidly oscillating G.
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