LCDM halo substructure properties revealed with high resolution and large volume cosmological simulations
| Autor: | Ángeles Moliné, Miguel A Sánchez-Conde, Alejandra Aguirre-Santaella, Tomoaki Ishiyama, Francisco Prada, Sofía A Cora, Darren Croton, Eric Jullo, R Benton Metcalf, Taira Oogi, José Ruedas |
|---|---|
| Přispěvatelé: | UAM. Departamento de Física Teórica, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Ministerio de Ciencia e Innovación (España), European Commission |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
cosmological model
velocity Cosmology and Nongalactic Astrophysics (astro-ph.CO) FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics galaxy: halo High Energy Physics - Phenomenology (hep-ph) dark matter: halo numerical methods Dark Matter structure halo: mass Astrophysics::Galaxy Astrophysics density Galaxies: Haloes resolution Física Astronomy and Astrophysics mass resolution redshift High Energy Physics - Phenomenology Space and Planetary Science statistics [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] Methods: Numerical many-body problem slope [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Cosmology: Theory Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2023, 518 (1), pp.157-173. ⟨10.1093/mnras/stac2930⟩ |
| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.1093/mnras/stac2930⟩ |
| Popis: | In this work, we investigate the structural properties, distribution and abundance of ΛCDM dark matter subhaloes using the Phi-4096 and Uchuu suite of N-body cosmological simulations. Thanks to the combination of their large volume, high mass resolution and superb statistics, we are able to quantify – for the first time consistently over more than seven decades in ratio of subhalo-to-host-halo mass – dependencies of subhalo properties on mass, maximum circular velocity, Vmax, host halo mass, and distance to host halo centre. We also dissect the evolution of these dependencies over cosmic time. We provide accurate fits for the subhalo mass and velocity functions, both exhibiting decreasing power-law slopes and with no significant dependence on redshift. We also find subhalo abundance to depend weakly on host halo mass. Subhalo structural properties are codified via a concentration parameter, cV, that does not depend on any pre-defined density profile and relies only on Vmax. We derive the cV−Vmax relation and find an important dependence on distance of the subhalo to the host halo centre. Interestingly, we also find subhaloes of the same mass to be significantly more concentrated when they reside inside more massive hosts. Finally, we investigate the redshift evolution of cV, and provide accurate fits. Our results offer an unprecedented detailed characterization of the subhalo population, consistent over a wide range of subhalo and host halo masses, as well as cosmic times. Thus, we expect our work to be particularly useful for any future research involving dark matter halo substructure. © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. The work of AM, MASC, and AAS was supported by the Spanish Agencia Estatal de Investigación through the grants PGC2018-095161-B-I00 and IFT Centro de Excelencia Severo Ochoa SEV-2016-0597, the Atracción de Talento contracts no. 2016-T1/TIC-1542 and 2020-5A/TIC-19725 granted by the Comunidad de Madrid in Spain, and the MultiDark Consolider Network FPA2017-90566-REDC. The work of AM was also supported by ‘Comunidad de Madrid S2018/NMT-4291 TEC2SPACE-CM’. The work of AAS was also supported by the Spanish Ministry of Science and Innovation through the grant FPI-UAM 2018. FP thanks the support of the Spanish Ministry of Science and Innovation funding grant PGC2018- 101931-B-I00. TI was supported by MEXT as ‘Program for Promoting Researches on the Supercomputer Fugaku’ (JPMXP1020200109), MEXT/JSPS KAKENHI Grant Number JP19KK0344, JP20H05245, JP21H01122 and IAAR Research Support Program, Chiba University, Japan. SAC acknowledges funding from Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, PIP-0387), Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Agencia I+D + i, PICT-2018-3743), and Universidad Nacional de La Plata (G11-150), Argentina. EJ acknowledges financial support from CNRS. TO is supported by JSPS KAKENHI Grant Number 20K22360 and 21H05449. This work used the skun6@IAA facility (http://www.skiesanduniverses.org) managed by the Instituto de Astrofísica de Andalucía (CSIC). The equipment was funded by the Spanish Ministry of Science EU-FEDER infrastructure grants EQC2018-004366-P and EQC2019-006089-P. The Uchuu, Shin-Uchuu, and Phi-4096 simulations were carried out on Aterui II supercomputer at Center for Computational Astrophysics, CfCA, of National Astronomical Observatory of Japan. The numerical analysis were partially carried out on XC40 at the Yukawa Institute Computer Facility in Kyoto University. With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001131-S). |
| Databáze: | OpenAIRE |
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