Hydrodynamic simulations

Simulation of a star being torn apart by the tidal forces of a supermassive black hole and a stream of material drawn from it

A star's rapid rotation may explain why flares near a black hole fade away

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Hydrodynamic simulations suggest that a star that was spinning rapidly before being captured in orbit around a supermassive black hole loses less material with each pass, so the repeated flares become weaker. The same scenario may also explain
Common striped hyenas clean parasites from a common warthog in Uganda

The secret language that allows animals to cooperate across species

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A new review shows that sounds, body postures, colors, vibrations, and chemical signals allow animals of different species to coordinate actions, exchange services, and reduce the risk of exploitation or predation.
Hypernova shockwave eruptions: Hypernovae are even more violent astronomical phenomena than supernovae, with explosion energies that exceed those of supernovae by more than ten times. These powerful explosions are usually accompanied by powerful jets that create unique shock explosion structures at the poles of the star. The jets not only cause the explosion, but also create strong flow instabilities within the ejected material, which causes further mixing of the star's interior. Recent observational data suggest that the famous supernova 1987A may be associated with a jet explosion, rather than the spherical explosion predicted by previous one-dimensional models. Credit: ASIAA/ Ke-Jung Chen

Predicting stellar explosions: New simulations reveal the physics of supernova shockwave eruptions

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