The Last Journey. I. An Extreme-Scale Simulation on the Mira Supercomputer. (arXiv:2006.01697v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Heitmann_K/0/1/0/all/0/1">Katrin Heitmann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Frontiere_N/0/1/0/all/0/1">Nicholas Frontiere</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rangel_E/0/1/0/all/0/1">Esteban Rangel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Larsen_P/0/1/0/all/0/1">Patricia Larsen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pope_A/0/1/0/all/0/1">Adrian Pope</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sultan_I/0/1/0/all/0/1">Imran Sultan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Uram_T/0/1/0/all/0/1">Thomas Uram</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Habib_S/0/1/0/all/0/1">Salman Habib</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Finkel_H/0/1/0/all/0/1">Hal Finkel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Korytov_D/0/1/0/all/0/1">Danila Korytov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kovacs_E/0/1/0/all/0/1">Eve Kovacs</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rizzi_S/0/1/0/all/0/1">Silvio Rizzi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Insley_J/0/1/0/all/0/1">Joe Insley</a>
The Last Journey is a large-volume, gravity-only, cosmological N-body
simulation evolving more than 1.24 trillion particles in a periodic box with a
side-length of 5.025Gpc. It was implemented using the HACC simulation and
analysis framework on the BG/Q system, Mira. The cosmological parameters are
chosen to be consistent with the results from the Planck satellite. A range of
analysis tools have been run in situ to enable a diverse set of science
projects, and at the same time, to keep the resulting data amount manageable.
Analysis outputs have been generated starting at redshift z~10 to allow for
construction of synthetic galaxy catalogs using a semi-analytic modeling
approach in post-processing. As part of our in situ analysis pipeline we employ
a new method for tracking halo sub-structures, introducing the concept of
subhalo cores. The production of multi-wavelength synthetic sky maps is
facilitated by generating particle lightcones in situ, also beginning at z~10.
We provide an overview of the simulation set-up and the generated data
products; a first set of analysis results is presented. A subset of the data is
publicly available.
The Last Journey is a large-volume, gravity-only, cosmological N-body
simulation evolving more than 1.24 trillion particles in a periodic box with a
side-length of 5.025Gpc. It was implemented using the HACC simulation and
analysis framework on the BG/Q system, Mira. The cosmological parameters are
chosen to be consistent with the results from the Planck satellite. A range of
analysis tools have been run in situ to enable a diverse set of science
projects, and at the same time, to keep the resulting data amount manageable.
Analysis outputs have been generated starting at redshift z~10 to allow for
construction of synthetic galaxy catalogs using a semi-analytic modeling
approach in post-processing. As part of our in situ analysis pipeline we employ
a new method for tracking halo sub-structures, introducing the concept of
subhalo cores. The production of multi-wavelength synthetic sky maps is
facilitated by generating particle lightcones in situ, also beginning at z~10.
We provide an overview of the simulation set-up and the generated data
products; a first set of analysis results is presented. A subset of the data is
publicly available.
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