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simulations

This tag is associated with 95 posts

Bars: Star Mixologists

Can bars in a galaxy cause radial migrations of stars? The simulations say yes, but these observations suggest otherwise…

Crater Simulation

Iapetus: Growing Up in a Rough Neighborhood

Saturn’s moon Iapetus has been bombarded pretty heavily by debris from the outer Solar System. But it’s not TOO smashed up — its strange, 20-km-high, equatorial ridge is still standing. The authors of this paper simulate the bombardment of Iapetus to figure out how much mass could have collided with the moon without destroying the ridge.

Searching for Life via Exoplanet Smog

Today’s paper proposes a detection method for technologically advanced life that goes beyond the usual SETI signals: looking at exoplanet atmospheres not just for the presence of life in general, but for the chemical signatures of intelligent life.

Entering the Matrix: Exploring the formation history of a universe on your laptop

How Dylan Nelson produced amazing, interactive visualizations of the Illustris simulation

Massive Stars Don’t Make Good Neighbors

Massive stars emit energetic radiation and expel strong winds that can disrupt their natal environments. New simulations show that these effects are important in the evolution of stellar nurseries and can account for some of the observed low efficiency of star formation.

Can Planets Maintain Vega’s Debris Disks?

Vega’s system of debris disks can be explained by a series of planets that constantly transport material inwards towards the star.

Pluto’s Dusty Neighborhood

Pluto’s small satellites have very low escape velocities, which means that dust kicked up by impacts has a relatively easy time of escaping rather than settling back down to the little moon’s surface. Today’s paper looks at the fates of that dust.

How giant planets affect accretion of water by rocky planets

How do giant planets affect the water content of rocky planets in habitable zones? Astronomers have run new planet formation simulations to try to answer this question.

Was Mars’ ancient magnetic field global or localized?

Strongly magnetized rocks on Mars are primarily concentrated in the southern hemisphere. This paper raises a serious objection to the hypothesis that localized dynamo action in the ancient martian core explains this puzzling observation.

Can Scattering Explain Eccentric Planets?

New dynamical simulations show that close-in planets on eccentric orbits can arise from planet-planet scattering — but only if the scattering occurs on larger orbits and is followed by inward migration.

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