Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe
We introduce the Illustris Project, a series of large-scale hydrodynamical simulations of galaxy formation. The highest resolution simulation, Illustris-1, covers a volume of (106.5 Mpc)[superscript 3], has a dark mass resolution of 6.26 × 10[superscript 6]M[subscript ⊙], and an initial baryonic mat...
| Main Authors: | , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Oxford University Press
2015
|
| Online Access: | http://hdl.handle.net/1721.1/98450 https://orcid.org/0000-0001-8593-7692 |
| _version_ | 1826194647769153536 |
|---|---|
| author | Vogelsberger, Mark Genel, Shy Springel, Volker Torrey, Paul Sijacki, Debora Xu, Dandan Snyder, Greg Nelson, Dylan Hernquist, Lars |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Vogelsberger, Mark Genel, Shy Springel, Volker Torrey, Paul Sijacki, Debora Xu, Dandan Snyder, Greg Nelson, Dylan Hernquist, Lars |
| author_sort | Vogelsberger, Mark |
| collection | MIT |
| description | We introduce the Illustris Project, a series of large-scale hydrodynamical simulations of galaxy formation. The highest resolution simulation, Illustris-1, covers a volume of (106.5 Mpc)[superscript 3], has a dark mass resolution of 6.26 × 10[superscript 6]M[subscript ⊙], and an initial baryonic matter mass resolution of 1.26 × 10[superscript 6]M[subscript ⊙]. At z = 0 gravitational forces are softened on scales of 710 pc, and the smallest hydrodynamical gas cells have an extent of 48 pc. We follow the dynamical evolution of 2 × 1820[superscript 3] resolution elements and in addition passively evolve 1820[superscript 3] Monte Carlo tracer particles reaching a total particle count of more than 18 billion. The galaxy formation model includes: primordial and metal-line cooling with self-shielding corrections, stellar evolution, stellar feedback, gas recycling, chemical enrichment, supermassive black hole growth, and feedback from active galactic nuclei. Here we describe the simulation suite, and contrast basic predictions of our model for the present-day galaxy population with observations of the local universe. At z = 0 our simulation volume contains about 40 000 well-resolved galaxies covering a diverse range of morphologies and colours including early-type, late-type and irregular galaxies. The simulation reproduces reasonably well the cosmic star formation rate density, the galaxy luminosity function, and baryon conversion efficiency at z = 0. It also qualitatively captures the impact of galaxy environment on the red fractions of galaxies. The internal velocity structure of selected well-resolved disc galaxies obeys the stellar and baryonic Tully–Fisher relation together with flat circular velocity curves. In the well-resolved regime, the simulation reproduces the observed mix of early-type and late-type galaxies. Our model predicts a halo mass dependent impact of baryonic effects on the halo mass function and the masses of haloes caused by feedback from supernova and active galactic nuclei. |
| first_indexed | 2024-09-23T09:59:12Z |
| format | Article |
| id | mit-1721.1/98450 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:59:12Z |
| publishDate | 2015 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | mit-1721.1/984502022-09-30T18:07:39Z Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe Vogelsberger, Mark Genel, Shy Springel, Volker Torrey, Paul Sijacki, Debora Xu, Dandan Snyder, Greg Nelson, Dylan Hernquist, Lars Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Vogelsberger, Mark We introduce the Illustris Project, a series of large-scale hydrodynamical simulations of galaxy formation. The highest resolution simulation, Illustris-1, covers a volume of (106.5 Mpc)[superscript 3], has a dark mass resolution of 6.26 × 10[superscript 6]M[subscript ⊙], and an initial baryonic matter mass resolution of 1.26 × 10[superscript 6]M[subscript ⊙]. At z = 0 gravitational forces are softened on scales of 710 pc, and the smallest hydrodynamical gas cells have an extent of 48 pc. We follow the dynamical evolution of 2 × 1820[superscript 3] resolution elements and in addition passively evolve 1820[superscript 3] Monte Carlo tracer particles reaching a total particle count of more than 18 billion. The galaxy formation model includes: primordial and metal-line cooling with self-shielding corrections, stellar evolution, stellar feedback, gas recycling, chemical enrichment, supermassive black hole growth, and feedback from active galactic nuclei. Here we describe the simulation suite, and contrast basic predictions of our model for the present-day galaxy population with observations of the local universe. At z = 0 our simulation volume contains about 40 000 well-resolved galaxies covering a diverse range of morphologies and colours including early-type, late-type and irregular galaxies. The simulation reproduces reasonably well the cosmic star formation rate density, the galaxy luminosity function, and baryon conversion efficiency at z = 0. It also qualitatively captures the impact of galaxy environment on the red fractions of galaxies. The internal velocity structure of selected well-resolved disc galaxies obeys the stellar and baryonic Tully–Fisher relation together with flat circular velocity curves. In the well-resolved regime, the simulation reproduces the observed mix of early-type and late-type galaxies. Our model predicts a halo mass dependent impact of baryonic effects on the halo mass function and the masses of haloes caused by feedback from supernova and active galactic nuclei. 2015-09-10T17:33:47Z 2015-09-10T17:33:47Z 2014-08 2014-07 Article http://purl.org/eprint/type/JournalArticle 0035-8711 1365-2966 http://hdl.handle.net/1721.1/98450 Vogelsberger, M., S. Genel, V. Springel, P. Torrey, D. Sijacki, D. Xu, G. Snyder, D. Nelson, and L. Hernquist. “Introducing the Illustris Project: Simulating the Coevolution of Dark and Visible Matter in the Universe.” Monthly Notices of the Royal Astronomical Society 444, no. 2 (August 26, 2014): 1518–1547. https://orcid.org/0000-0001-8593-7692 en_US http://dx.doi.org/10.1093/mnras/stu1536 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press arXiv |
| spellingShingle | Vogelsberger, Mark Genel, Shy Springel, Volker Torrey, Paul Sijacki, Debora Xu, Dandan Snyder, Greg Nelson, Dylan Hernquist, Lars Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title | Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title_full | Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title_fullStr | Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title_full_unstemmed | Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title_short | Introducing the Illustris Project: simulating the coevolution of dark and visible matter in the Universe |
| title_sort | introducing the illustris project simulating the coevolution of dark and visible matter in the universe |
| url | http://hdl.handle.net/1721.1/98450 https://orcid.org/0000-0001-8593-7692 |
| work_keys_str_mv | AT vogelsbergermark introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT genelshy introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT springelvolker introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT torreypaul introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT sijackidebora introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT xudandan introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT snydergreg introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT nelsondylan introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse AT hernquistlars introducingtheillustrisprojectsimulatingthecoevolutionofdarkandvisiblematterintheuniverse |