Theory

Efficient simulation of discrete galaxy populations and associated radiation fields over the first billion years  featured image

Efficient simulation of discrete galaxy populations and associated radiation fields over the first billion years

A new physical model within the popular 21cmFAST simulation code that allows for the efficient generation of discrete galaxy populations and their associated radiation fields, over …

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Steven G. Murray
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The EDGES measurement disfavors an excess radio background during the cosmic dawn featured image

The EDGES measurement disfavors an excess radio background during the cosmic dawn

We re-analyze the same EDGES data that sparked a rush of interest in exotic dark matter models and excess radio backgrounds, finding that accounting for both the possibility of …

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Steven G. Murray
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matvis: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays featured image

matvis: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays

We introduce matvis, a GPU-accelerated matrix-based visibility simulator for many-element 21 cm arrays that allows simulation of mock observations on unprecedented scales.

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Steven G. Murray
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21cmEMU: an emulator of 21cmFAST summary observables

We present 21cmEMU, a machine learning-based emulator of the popular 21cmFAST simulation code. 21cmEMU can rapidly generate predictions for summary observables like the global 21 …

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Steven G. Murray
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FORWARD

FORWARD is the name of my Marie Sklodowska-Curie Fellowship. It's not an acronym: it is short for "Forward-Models of Cosmic Dawn: connecting 21cm simulations to the real world". …

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Cosmic Dawn

Cosmic Dawn refers to the time in the Universe’s past when the first stars and galaxies burst into life. We know such a time exists, simply because we know there was a time without …

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21cmMC

21cmMC uses [21cmFAST](/codes/21cmFAST) to compare observations with theory, and predict astrophysical and cosmological parameters. This is a beast of a process, since it must run …

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21cmFAST

21cmFAST is the premiere semi-numerical 21cm cosmological simulator. It is currently used by every 21cm cosmology experiment to derive predictions of the spatial distribution of …

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21cmFAST

21cmFAST is the premiere semi-numerical 21cm cosmological simulator. It is currently used by every 21cm cosmology experiment to derive predictions of the spatial distribution of …

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