Simulating cosmological substructure in the solar neighbourhood
Open accessAbstract
We explore the predictive power of cosmological, hydrodynamical simulations for stellar phase-space substructure and velocity correlations with the auriga simulations and aurigaia mock Gaia catalogues. We show that at the solar circle the auriga simulations commonly host phase-space structures in the stellar component that have constant orbital energies and arise from accreted subhaloes. These structures can persist for a few Gyr, even after coherent streams in position space have been erased. We also explore velocity two-point correlation functions and find this diagnostic is not deterministic for particular clustering patterns in phase space. Finally, we explore these structure diagnostics with the aurigaia catalogues and show that current catalogues have the ability to recover some structures in phase space but careful consideration is required to separate physical structures from numerical structures arising from catalogue generation methods.
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Substructure is still present in integrals-of-motion spaces even in simulations of the full hierarchical assembly of the halo.
“Nonetheless, Gómez et al. (2013) and Simpson et al. (2019), for example, have shown that substructure is still present in these spaces, even in simulations of the full hierarchical assembly of the halo.”
From Streams, Substructures, and the Early History of the Milky Way (2020) · cites this paper as Simpson et al. 2019
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Cites
On the identification of substructure in phase space using orbital frequencies
Gómez, F. A., & Helmi, A. (2010) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2009.15841.x · Cited by 83 · see citing works
Self-citationStreams in the Aquarius stellar haloes
Gómez, F. A., Helmi, A., Cooper, A. P., Frenk, C. S., Navarro, J. F., & White, S. D. M. (2013) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stt1838 · Cited by 56 · see citing works
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Research works printed but not linked: 32
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Cited by
Sorted by citations
Streams, Substructures, and the Early History of the Milky Way
Helmi, A. (2020) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-032620-021917 · Cited by 407 · see citing works
- Authors
- Simpson, C. M., Gargiulo, I., Gómez, F. A., Grand, R. J. J., Maffione, N., Cooper, A. P., Deason, A. J., Frenk, C., Helly, J., Marinacci, F., & Pakmor, R.
- Affiliations
- University of Chicago (US)
- University of La Serena (CL)
- Max Planck Institute for Astrophysics (DE)
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- National Tsing Hua University (TW)
- Durham University (GB)
- University of Bologna (IT)
- Corresponding author
- Simpson, Christine M
- ORCID
- Venue
- Monthly Notices of the Royal Astronomical Society: Letters
- Publisher
- Oxford University Press (OUP)
- Published
- 2019-09-20
- Volume
- 490
- Issue
- 1
- Pages
- L32-L37
- ISSN
- 1745-3925 (ISSN-L)
- 1745-3933
- OpenAlex
- W2973345313
- Cited by
- 22
- References
- 2
- Citations by year
- 2025: 4 · 2024: 3 · 2023: 6 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 1
- FWCI
- 1.20
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model (vor)
- Locations
- Monthly Notices of the Royal Astronomical Society Letters (publishedVersion)
- Americanae (AECID Library) (acceptedVersion, other-oa)
- Durham Research Online (Durham University) (acceptedVersion)
- Liverpool John Moores University (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- Durham Research Online (Durham University) (submittedVersion, cc-by)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-sa)
- Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- CONICET Digital (CONICET) (submittedVersion, cc-by-nc-sa)
- arXiv (Cornell University)
- Funders
- Consejo Nacional de Innovación, Ciencia y Tecnología
- Fondo Nacional de Desarrollo Científico y Tecnológico (1181264)
- Max Planck Society
- Taiwan Ministry of Education
- Science and Technology Facilities Council (ST/F001166/1, ST/I00162X/1, ST/P000541/1, ST/K00042X/1, ST/H008519/1, ST/K003267/1)
- European Research Council (786910)
- Durham University
- Bremerhavener Gesellschaft für Investitionsförderung und Stadtentwicklung
- Ministero dell’Istruzione, dell’Università e della Ricerca
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Keywords
- solar neighborhood, velocity correlation function, Auriga simulations, stellar streams, orbital energies, cosmological hydrodynamical simulations
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