SC12 Home > SC12 Schedule > SC12 Presentation - Direct Numerical Simulations of Cosmological Reionization: Field Comparison: Ionization Fraction

SCHEDULE: NOV 10-16, 2012

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Direct Numerical Simulations of Cosmological Reionization: Field Comparison: Ionization Fraction

SESSION: Scientific Visualization Showcase Reception

EVENT TYPE: Scientific Visualization Showcases

TIME: 5:15PM - 7:00PM

AUTHOR(S):Joseph A. Insley, Rick W, Robert Harkness, Michael L. Norman, Daniel R. Reynolds, Mark Hereld, Michael E. Papka

ROOM:North Foyer

ABSTRACT:
The light from early galaxies had a dramatic impact on the gasses filling the universe. This video highlights the spatial structure of the lights effect, by comparing two simulations: one with a self-consistent radiation field (radiative), and one without (non-radiative), each with a very high dynamic range. Ionization fraction is the amount of the gas that has been ionized. Looking at this quantity from the simulations side-by-side one can clearly see differences but it can be difficult to decipher how the regions of concentration in the two simulations relate to one another. However, because the simulations have the same initial conditions, we can directly compare them, by looking at the relative difference of the ionization fraction in a single view. The yellow and red regions show where the gas has been ionized in the radiative simulation, while at the center of these blobs are small blue regions where the ionized gas from the non-radiative simulation is concentrated. The purple illustrates the boundary at the advancing edge of the ionization from the radiative simulation, where the two simulations are the same.

Chair/Author Details:

Joseph A. Insley - Argonne National Laboratory

Rick W - San Diego Supercomputer Center

Robert Harkness - San Diego Supercomputer Center

Michael L. Norman - San Diego Supercomputer Center

Daniel R. Reynolds - Southern Methodist University

Mark Hereld - Argonne National Laboratory

Michael E. Papka - Argonne National Laboratory

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Direct Numerical Simulations of Cosmological Reionization: Field Comparison: Ionization Fraction

SESSION: Scientific Visualization Showcase Reception

EVENT TYPE:

TIME: 5:15PM - 7:00PM

AUTHOR(S):Joseph A. Insley, Rick W, Robert Harkness, Michael L. Norman, Daniel R. Reynolds, Mark Hereld, Michael E. Papka

ROOM:North Foyer

ABSTRACT:
The light from early galaxies had a dramatic impact on the gasses filling the universe. This video highlights the spatial structure of the lights effect, by comparing two simulations: one with a self-consistent radiation field (radiative), and one without (non-radiative), each with a very high dynamic range. Ionization fraction is the amount of the gas that has been ionized. Looking at this quantity from the simulations side-by-side one can clearly see differences but it can be difficult to decipher how the regions of concentration in the two simulations relate to one another. However, because the simulations have the same initial conditions, we can directly compare them, by looking at the relative difference of the ionization fraction in a single view. The yellow and red regions show where the gas has been ionized in the radiative simulation, while at the center of these blobs are small blue regions where the ionized gas from the non-radiative simulation is concentrated. The purple illustrates the boundary at the advancing edge of the ionization from the radiative simulation, where the two simulations are the same.

Chair/Author Details:

Joseph A. Insley - Argonne National Laboratory

Rick W - San Diego Supercomputer Center

Robert Harkness - San Diego Supercomputer Center

Michael L. Norman - San Diego Supercomputer Center

Daniel R. Reynolds - Southern Methodist University

Mark Hereld - Argonne National Laboratory

Michael E. Papka - Argonne National Laboratory

Add to iCal  Click here to download .ics calendar file

Add to Outlook  Click here to download .vcs calendar file

Add to Google Calendarss  Click here to add event to your Google Calendar