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

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

Kim, Ji Hoon (författare): Stanford University,Stanford Linear Accelerator Center (SLAC),California Institute of Technology

Agertz, Oscar (författare): Lund 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

Teyssier, Romain (författare): University of Zurich

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Butler, Michael J. (författare): Max Planck Institute for Astronomy

Ceverino, Daniel (författare): Heidelberg University

Choi, Jun Hwan (författare): University of Texas

Feldmann, Robert (författare): University of California, Berkeley

Keller, Ben W. (författare): McMaster University

Lupi, Alessandro (författare): Paris-Sorbonne University

Quinn, Thomas (författare): University of Washington

Revaz, Yves (författare): Swiss Federal Institute of Technology

Wallace, Spencer (författare): University of Washington

Gnedin, Nickolay Y. (författare): University of Chicago

Leitner, Samuel N. (författare): University of Maryland

Shen, Sijing (författare): University of Cambridge

Smith, Britton D. (författare): University of Edinburgh

Thompson, Robert (författare): University of Illinois at Urbana-Champaign

Turk, Matthew J. (författare): University of Illinois at Urbana-Champaign

Abel, Tom (författare): Stanford Linear Accelerator Center (SLAC),Stanford University

Arraki, Kenza S. (författare): New Mexico State University

Benincasa, Samantha M. (författare): McMaster University

Chakrabarti, Sukanya (författare): Rochester Institute of Technology

Degraf, Colin (författare): University of Cambridge

Dekel, Avishai (författare): Hebrew University of Jerusalem

Goldbaum, Nathan J. (författare): University of Illinois at Urbana-Champaign

Hopkins, Philip F. (författare): California Institute of Technology

Hummels, Cameron B. (författare): California Institute of Technology

Klypin, Anatoly (författare): New Mexico State University

Li, Hui (författare): University of Michigan

Madau, Piero (författare): University of California, Santa Cruz

Mandelker, Nir (författare): Hebrew University of Jerusalem,Yale University

Mayer, Lucio (författare): University of Zurich

Nagamine, Kentaro (författare): Osaka University,University of Nevada, Reno

Nickerson, Sarah (författare): University of Zurich

O'Shea, Brian W. (författare): Michigan State University

Primack, Joel R. (författare): University of California, Santa Cruz

Roca-Fàbrega, Santi (författare): Hebrew University of Jerusalem

Semenov, Vadim (författare): University of Chicago

Shimizu, Ikkoh (författare): Osaka University

Simpson, Christine M. (författare): Heidelberg Institute for Theoretical Studies

Todoroki, Keita (författare): University of Kansas

Wadsley, James W. (författare): McMaster University

Wise, John H. (författare): Georgia Institute of Technology

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(creator_code:org_t)

2016-12-19
2016
Engelska.
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 833:2

Relaterad länk:: http://dx.doi.org/10...; visa fler...; https://iopscience.i...; https://lup.lub.lu.s...; https://doi.org/10.3...; visa färre...

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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.

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Av författaren/redakt...: Kim, Ji Hoon; Agertz, Oscar; Teyssier, Romain; Butler, Michael ...; Ceverino, Daniel; Choi, Jun Hwan; visa fler...; Feldmann, Robert; Keller, Ben W.; Lupi, Alessandro; Quinn, Thomas; Revaz, Yves; Wallace, Spencer; Gnedin, Nickolay ...; Leitner, Samuel ...; Shen, Sijing; Smith, Britton D ...; Thompson, Robert; Turk, Matthew J.; Abel, Tom; Arraki, Kenza S.; Benincasa, Saman ...; Chakrabarti, Suk ...; Degraf, Colin; Dekel, Avishai; Goldbaum, Nathan ...; Hopkins, Philip ...; Hummels, Cameron ...; Klypin, Anatoly; Li, Hui; Madau, Piero; Mandelker, Nir; Mayer, Lucio; Nagamine, Kentar ...; Nickerson, Sarah; O'Shea, Brian W.; Primack, Joel R.; Roca-Fàbrega, Sa ...; Semenov, Vadim; Shimizu, Ikkoh; Simpson, Christi ...; Todoroki, Keita; Wadsley, James W ...; Wise, John H.; visa färre...

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Av lärosätet: Lunds universitet

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

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