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  • Kim, Ji HoonStanford University,California Institute of Technology,Stanford Linear Accelerator Center (SLAC) (author)

THE AGORA HIGH-RESOLUTION GALAXY SIMULATIONS COMPARISON PROJECT. II. ISOLATED DISK TEST

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-12-19
  • American Astronomical Society,2016

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:2027817f-e1f0-4314-8af2-13df3c586e17
  • https://lup.lub.lu.se/record/2027817f-e1f0-4314-8af2-13df3c586e17URI
  • https://doi.org/10.3847/1538-4357/833/2/202DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Using an isolated Milky Way-mass galaxy simulation, we compare results from nine state-of-the-art gravito-hydrodynamics codes widely used in the numerical community. We utilize the infrastructure we have built for the AGORA High-resolution Galaxy Simulations Comparison Project. This includes the common disk initial conditions, common physics models (e.g., radiative cooling and UV background by the standardized package Grackle) and common analysis toolkit yt, all of which are publicly available. Subgrid physics models such as Jeans pressure floor, star formation, supernova feedback energy, and metal production are carefully constrained across code platforms. With numerical accuracy that resolves the disk scale height, we find that the codes overall agree well with one another in many dimensions including: gas and stellar surface densities, rotation curves, velocity dispersions, density and temperature distribution functions, disk vertical heights, stellar clumps, star formation rates, and Kennicutt-Schmidt relations. Quantities such as velocity dispersions are very robust (agreement within a few tens of percent at all radii) while measures like newly formed stellar clump mass functions show more significant variation (difference by up to a factor of ∼3). Systematic differences exist, for example, between mesh-based and particle-based codes in the low-density region, and between more diffusive and less diffusive schemes in the high-density tail of the density distribution. Yet intrinsic code differences are generally small compared to the variations in numerical implementations of the common subgrid physics such as supernova feedback. Our experiment reassures that, if adequately designed in accordance with our proposed common parameters, results of a modern high-resolution galaxy formation simulation are more sensitive to input physics than to intrinsic differences in numerical schemes.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Agertz, OscarLund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science,University of Surrey(Swepub:lu)os6277ag (author)
  • Teyssier, RomainUniversity of Zurich (author)
  • Butler, Michael J.Max Planck Institute for Astronomy (author)
  • Ceverino, DanielHeidelberg University (author)
  • Choi, Jun HwanUniversity of Texas (author)
  • Feldmann, RobertUniversity of California, Berkeley (author)
  • Keller, Ben W.McMaster University (author)
  • Lupi, AlessandroParis-Sorbonne University (author)
  • Quinn, ThomasUniversity of Washington (author)
  • Revaz, YvesSwiss Federal Institute of Technology (author)
  • Wallace, SpencerUniversity of Washington (author)
  • Gnedin, Nickolay Y.University of Chicago (author)
  • Leitner, Samuel N.University of Maryland (author)
  • Shen, SijingUniversity of Cambridge (author)
  • Smith, Britton D.University of Edinburgh (author)
  • Thompson, RobertUniversity of Illinois at Urbana-Champaign (author)
  • Turk, Matthew J.University of Illinois at Urbana-Champaign (author)
  • Abel, TomStanford University,Stanford Linear Accelerator Center (SLAC) (author)
  • Arraki, Kenza S.New Mexico State University (author)
  • Benincasa, Samantha M.McMaster University (author)
  • Chakrabarti, SukanyaRochester Institute of Technology (author)
  • Degraf, ColinUniversity of Cambridge (author)
  • Dekel, AvishaiHebrew University of Jerusalem (author)
  • Goldbaum, Nathan J.University of Illinois at Urbana-Champaign (author)
  • Hopkins, Philip F.California Institute of Technology (author)
  • Hummels, Cameron B.California Institute of Technology (author)
  • Klypin, AnatolyNew Mexico State University (author)
  • Li, HuiUniversity of Michigan (author)
  • Madau, PieroUniversity of California, Santa Cruz (author)
  • Mandelker, NirHebrew University of Jerusalem,Yale University (author)
  • Mayer, LucioUniversity of Zurich (author)
  • Nagamine, KentaroOsaka University,University of Nevada, Reno (author)
  • Nickerson, SarahUniversity of Zurich (author)
  • O'Shea, Brian W.Michigan State University (author)
  • Primack, Joel R.University of California, Santa Cruz (author)
  • Roca-Fàbrega, SantiHebrew University of Jerusalem (author)
  • Semenov, VadimUniversity of Chicago (author)
  • Shimizu, IkkohOsaka University (author)
  • Simpson, Christine M.Heidelberg Institute for Theoretical Studies (author)
  • Todoroki, KeitaUniversity of Kansas (author)
  • Wadsley, James W.McMaster University (author)
  • Wise, John H.Georgia Institute of Technology (author)
  • Stanford UniversityCalifornia Institute of Technology (creator_code:org_t)

Related titles

  • In:Astrophysical Journal: American Astronomical Society833:20004-637X1538-4357

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