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The MillenniumTNG Project: the large-scale clustering of galaxies

Bose, Sownak; Hadzhiyska, Boryana; Barrera, Monica; Delgado, Ana Maria; Ferlito, Fulvio; Frenk, Carlos; Hernández-Aguayo, César; Hernquist, Lars; Kannan, Rahul; Pakmor, Rüdiger; Springel, Volker; White, Simon D M

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Sownak Bose

Boryana Hadzhiyska

Monica Barrera

Ana Maria Delgado

Fulvio Ferlito

César Hernández-Aguayo

Lars Hernquist

Rahul Kannan

Rüdiger Pakmor

Volker Springel

Simon D M White


Modern redshift surveys are tasked with mapping out the galaxy distribution over enormous distance scales. Existing hydrodynamical simulations, however, do not reach the volumes needed to match upcoming surveys. We present results for the clustering of galaxies using a new, large volume hydrodynamical simulation as part of the MillenniumTNG (MTNG) project. With a computational volume that is ≈15 times larger than the next largest such simulation currently available, we show that MTNG is able to accurately reproduce the observed clustering of galaxies as a function of stellar mass. When separated by colour, there are some discrepancies with respect to the observed population, which can be attributed to the quenching of satellite galaxies in our model. We combine MTNG galaxies with those generated using a semi-analytic model to emulate the sample selection of luminous red galaxies (LRGs) and emission-line galaxies (ELGs) and show that, although the bias of these populations is approximately (but not exactly) constant on scales larger than ≈10 Mpc, there is significant scale-dependent bias on smaller scales. The amplitude of this effect varies between the two galaxy types and between the semi-analytic model and MTNG. We show that this is related to the distribution of haloes hosting LRGs and ELGs. Using mock SDSS-like catalogues generated on MTNG lightcones, we demonstrate the existence of prominent baryonic acoustic features in the large-scale galaxy clustering. We also demonstrate the presence of realistic redshift space distortions in our mocks, finding excellent agreement with the multipoles of the redshift-space clustering measured in SDSS data.


Bose, S., Hadzhiyska, B., Barrera, M., Delgado, A. M., Ferlito, F., Frenk, C., …White, S. D. M. (2023). The MillenniumTNG Project: the large-scale clustering of galaxies. Monthly Notices of the Royal Astronomical Society, 524(2), 2579-2593.

Journal Article Type Article
Acceptance Date Mar 22, 2023
Online Publication Date Jul 20, 2023
Publication Date 2023-09
Deposit Date Aug 17, 2023
Publicly Available Date Aug 17, 2023
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 524
Issue 2
Pages 2579-2593
Keywords Space and Planetary Science; Astronomy and Astrophysics
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Copyright Statement
© The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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