AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation
The A eos project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities of galaxy evolution within the first ~300 Myr by modeling in...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ada4a1 |
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| author | Kaley Brauer Andrew Emerick Jennifer Mead Alexander P. Ji John H. Wise Greg L. Bryan Mordecai-Mark Mac Low Benoit Côté Eric P. Andersson Anna Frebel |
| author_facet | Kaley Brauer Andrew Emerick Jennifer Mead Alexander P. Ji John H. Wise Greg L. Bryan Mordecai-Mark Mac Low Benoit Côté Eric P. Andersson Anna Frebel |
| author_sort | Kaley Brauer |
| collection | DOAJ |
| description | The A eos project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities of galaxy evolution within the first ~300 Myr by modeling individual stars and their feedback processes. By incorporating chemical yields from individual stars, A eos generates galaxies with diverse stellar chemical abundances, linking them to hierarchical galaxy formation and early nucleosynthetic events. These simulations underscore the importance of chemical abundance patterns in ancient stars as vital probes of early nucleosynthesis, star formation histories, and galaxy formation. We examine the metallicity floors of various elements resulting from Population III enrichment, providing best-fit values for eight different metals (e.g., [O/H] = −4.0) to guide simulations without Population III models. Additionally, we identify galaxies that begin star formation with Population II after external enrichment and investigate the frequency of carbon-enhanced metal-poor stars at varying metallicities. The A eos simulations offer detailed insights into the relationship between star formation, feedback, and chemical enrichment. Future work will extend these simulations to later epochs to interpret the diverse stellar populations of the Milky Way and its satellites. |
| format | Article |
| id | doaj-art-2de52b382d2d4b05b2a66d2018107b84 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-2de52b382d2d4b05b2a66d2018107b842025-08-20T02:12:50ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198014110.3847/1538-4357/ada4a1AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy FormationKaley Brauer0https://orcid.org/0000-0002-8810-858XAndrew Emerick1https://orcid.org/0000-0003-2807-328XJennifer Mead2https://orcid.org/0009-0006-4744-2350Alexander P. Ji3https://orcid.org/0000-0002-4863-8842John H. Wise4https://orcid.org/0000-0003-1173-8847Greg L. Bryan5https://orcid.org/0000-0003-2630-9228Mordecai-Mark Mac Low6https://orcid.org/0000-0003-0064-4060Benoit Côté7https://orcid.org/0000-0002-9986-8816Eric P. Andersson8https://orcid.org/0000-0003-3479-4606Anna Frebel9https://orcid.org/0000-0002-2139-7145Center for Astrophysics ∣ Harvard & Smithsonian , Cambridge, MA 02138, USA ; kaley.brauer@cfa.harvard.eduCarnegie Observatories , Pasadena, CA 91101, USADepartment of Astronomy, Columbia University , New York, NY 10027, USADepartment of Astronomy & Astrophysics, University of Chicago , 5640 S. Ellis Avenue, Chicago, IL 60637, USA; Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637, USACenter for Relativistic Astrophysics, School of Physics, Georgia Institute of Technology , Atlanta, GA 30332, USADepartment of Astronomy, Columbia University , New York, NY 10027, USA; Center for Computational Astrophysics, Flatiron Institute , New York, NY 10010, USADepartment of Astronomy, Columbia University , New York, NY 10027, USA; Department of Astrophysics, American Museum of Natural History , New York, NY 10024, USADepartment of Physics and Astronomy, University of Victoria , Victoria, BC V8P5C2, CanadaDepartment of Astrophysics, American Museum of Natural History , New York, NY 10024, USADepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USAThe A eos project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities of galaxy evolution within the first ~300 Myr by modeling individual stars and their feedback processes. By incorporating chemical yields from individual stars, A eos generates galaxies with diverse stellar chemical abundances, linking them to hierarchical galaxy formation and early nucleosynthetic events. These simulations underscore the importance of chemical abundance patterns in ancient stars as vital probes of early nucleosynthesis, star formation histories, and galaxy formation. We examine the metallicity floors of various elements resulting from Population III enrichment, providing best-fit values for eight different metals (e.g., [O/H] = −4.0) to guide simulations without Population III models. Additionally, we identify galaxies that begin star formation with Population II after external enrichment and investigate the frequency of carbon-enhanced metal-poor stars at varying metallicities. The A eos simulations offer detailed insights into the relationship between star formation, feedback, and chemical enrichment. Future work will extend these simulations to later epochs to interpret the diverse stellar populations of the Milky Way and its satellites.https://doi.org/10.3847/1538-4357/ada4a1Galaxy chemical evolutionDwarf galaxiesChemical enrichmentHydrodynamics |
| spellingShingle | Kaley Brauer Andrew Emerick Jennifer Mead Alexander P. Ji John H. Wise Greg L. Bryan Mordecai-Mark Mac Low Benoit Côté Eric P. Andersson Anna Frebel AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation The Astrophysical Journal Galaxy chemical evolution Dwarf galaxies Chemical enrichment Hydrodynamics |
| title | AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation |
| title_full | AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation |
| title_fullStr | AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation |
| title_full_unstemmed | AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation |
| title_short | AEOS: Star-by-star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation |
| title_sort | aeos star by star cosmological simulations of early chemical enrichment and galaxy formation |
| topic | Galaxy chemical evolution Dwarf galaxies Chemical enrichment Hydrodynamics |
| url | https://doi.org/10.3847/1538-4357/ada4a1 |
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