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simulations

This tag is associated with 102 posts

Chondrule formation by shocks?

Title: A critical analysis of shock models for chondrule formation Authors: Stammler & Dullemond First Author’s Institution: Heidelberg University and International Max Planck Research School for Astronomy and Cosmic Physics , Heidelberg Paper Status: Accepted for publication in Icarus Extraterrestrial rocks are important What’s a chondrule? Never heard of that before. That’s probably your first […]

Most Asteroids are Not in the Asteroid Belt

Simulations show that the Oort cloud contains eight billion asteroids (in addition to hundreds of billions of comets). Do these asteroids pose a threat to Earth?

Habitable Moons at the Ice Line?

Those of us who love astrobiology get really worked up about the lack of Earth-sized exoplanets found at Earth-like distances from their stars. All we want, we who hope for lots of extraterrestrial life, is a bunch of Earth-like planets doing Earth-like things so we can feel better about the odds for lots of Earth-like life in the universe.

UR #16: Star Cluster Evolution

This month’s undergraduate research post features a student who created N-body simulations of star clusters. Read on to find out what she learned about the clusters’ evolution!

Tipping the Spherical Cow: The Initial Conditions of Star Formation

Spherical cows have a long and storied history in physics, but does this type of crude approximation lead to realistic conclusions in the case of star formation? The combination of large- and small- scale simulations tests this idea.

Measuring Galaxy Star Formation

How well do the current methods of measuring the star formation rate of galaxies match then known star formation rate in simulations?

The History of the Galactic Halo

The number and luminosity distribution of white dwarfs stars can be used to help figure out the past history of the Galactic halo.

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.

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