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theory

This tag is associated with 42 posts

How does structure grow? Understanding the Meszaros effect

Explore an astrophysical classic describing the effect of the Universe’s expansion on the seeds of galaxies.

Growth of structure tells us how normal and dark matter scatter

What can the growth of structure in the Universe tell us about how regular matter and dark matter scatter? The authors develop a simple framework and get model-independent constraints; read on for the answer.

How Easily Do Carbon-Rich Planets Form?

A new model simulates the composition of growing planetesimals in an evolving protoplanetary disk. The model predicts that carbon-rich terrestrial planets can form more easily than previously thought.

A Reflection on Astrophysical Simulations

In this short critical essay, a computational astrophysicist, Kevin Heng, questions the movement of his field toward more complex models producing larger volumes of data. Toward the end of his essay, Heng poses some open questions to the simulation community. “Is scientific truth more robustly represented by the simplest, or the most complex model?”, and, “How may we judge when a simulation has successfully approximated reality in some way?”

Life, the Universe and Everything Explained

Why resort to complicated theories that involve mysterious, unknown forces and states of matter? The geocentric model of the Universe nicely explains 1st century C.E. data.

A New Way to Die: What Happens to Supermassive Stars?

Supermassive black holes are everywhere in our Universe, but we don’t know where they came from. Supermassive stars could have given birth to these massive objects. However, that is not all these fifty to one hundred solar mass stars could be responsible for…

Flipping Orbits

How do so many hot jupiters come to orbit backwards?

Dark matter and the Solar Interior

Depending on how they scatter with nuclei, dark matter particles might affect the structure and evolution of our Sun.

Pictures of Gravity

Field lines are a powerful tool for building intuition for a complex geometric object.

How Did Tatooine Form?

Dust traps may be the key to forming Kepler-16b and other circumbinary planets.

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