The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9 — mentioned by jpmattia

Thu, 16 Mar 2017 15:51:04 GMT

You got me curious, and I wanted to put numbers around this. It's worth noting that the actual paper claims only this is a black hole candidate, and is not certain it's a black hole (despite the Science alert headline). The paper guesses that the black hole is ~ 1 solar mass, so the Schwarzschild radius would be about 3 km. The distance is about 2.5x the earth-moon, which is about 10^6 km. btw, paper here: https://arxiv.org/pdf/1702.02167.pdf

Paper and discussion history. A mention is not an endorsement.

The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9 · HackerPapers discussions

The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9 — mentioned by jpmattia