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

SCHEDULE: NOV 10-16, 2012

When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.

Direct Numerical Simulations of Cosmological Reionization: Field Comparison: Density

SESSION: Scientific Visualization Showcase Reception

EVENT TYPE: Scientific Visualization Showcases

TIME: 5:15PM - 7:00PM

AUTHOR(S):Joseph A. Insley, Rick Wagner, 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. Looking at the simulations side-by-side its hard to see any difference. However, because the simulations have the same initial conditions, we can directly compare them, by looking at the relative difference of the density. The coral-like blobs are regions where light has radiated out, heating the gas, and raising the pressure. The red regions show where the density is much higher in the radiative simulation, while the yellow regions are where the non-radiative has more density, showing where gravity was able to pull the filaments into tighter cylinders, without having to work against pressure from stellar heating. This is the first known visualization of this process, known as Jeans smoothing.

Chair/Author Details:

Joseph A. Insley - Argonne National Laboratory

Rick Wagner - 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

Direct Numerical Simulations of Cosmological Reionization: Field Comparison: Density

SESSION: Scientific Visualization Showcase Reception

EVENT TYPE:

TIME: 5:15PM - 7:00PM

AUTHOR(S):Joseph A. Insley, Rick Wagner, 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. Looking at the simulations side-by-side its hard to see any difference. However, because the simulations have the same initial conditions, we can directly compare them, by looking at the relative difference of the density. The coral-like blobs are regions where light has radiated out, heating the gas, and raising the pressure. The red regions show where the density is much higher in the radiative simulation, while the yellow regions are where the non-radiative has more density, showing where gravity was able to pull the filaments into tighter cylinders, without having to work against pressure from stellar heating. This is the first known visualization of this process, known as Jeans smoothing.

Chair/Author Details:

Joseph A. Insley - Argonne National Laboratory

Rick Wagner - 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