Though black hole binaries can contain two primordial black holes — those thought to have formed in the very early universe — black holes found in tandem with neutron stars are unlikely to have a primordial origin.
Extremely detailed images of RY Tau suggest that the young star ejects knots of material at an irregular cadence and at significantly shorter intervals than other stars, which may be related to its mass accretion rate.
A new model describes for the first time the evolution of the stream of gas that results when a star gets ripped apart by a black hole, working toward an understanding of how radiation is generated in these events.
A proposed mission would touch down at local dusk in 2045, spend 88 Earth days collecting 11 gigabytes of data, then expire as its maximum operating temperature is exceeded as it sees the Sun rise from Mercury’s surface.
A massive star’s extreme dimming episode may be the result of mass loss that obscures the star, analogous to Betelgeuse’s “Great Dimming,” but this scenario makes finding true failed supernovae even more difficult.
New research shows that the apparent discrepancies in the mass and spin of black holes in X-ray binaries compared to those discovered with gravitational waves is the result of a selection effect.