The hestia project: Simulations of the Local Group

Noam I. Libeskind, Edoardo Carlesi, Robert J.J. Grand, Arman Khalatyan, Alexander Knebe, Ruediger Pakmor, Sergey Pilipenko, Marcel S. Pawlowski, Martin Sparre, Elmo Tempel, Peng Wang, Hélène M. Courtois, Stefan Gottlöber, Yehuda Hoffman, Ivan Minchev, Christoph Pfrommer, Jenny G. Sorce, Volker Springel, Matthias Steinmetz, R. Brent TullyMark Vogelsberger, Gustavo Yepes

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


We present the hestia simulation suite: High-resolutions Environmental Simulations of The Immediate Area, a set of cosmological simulations of the Local Group. Initial conditions constrained by the observed peculiar velocity of nearby galaxies are employed to accurately simulate the local cosmography. Halo pairs that resemble the Local Group are found in low resolutions constrained, dark matter only simulations, and selected for higher resolution magneto hydrodynamic simulation using the arepo code. Baryonic physics follows the auriga model of galaxy formation. The simulations contain a high-resolution region of 3-5 Mpc in radius from the Local Group mid-point embedded in the correct cosmographic landscape. Within this region, a simulated Local Group consisting of a Milky Way and Andromeda like galaxy forms, whose description is in excellent agreement with observations. The simulated Local Group galaxies resemble the Milky Way and Andromeda in terms of their halo mass, mass ratio, stellar disc mass, morphology separation, relative velocity, rotation curves, bulge-disc morphology, satellite galaxy stellar mass function, satellite radial distribution, and in some cases, the presence of a Magellanic cloud like object. Because these simulations properly model the Local Group in their cosmographic context, they provide a testing ground for questions where environment is thought to play an important role.

Original languageEnglish
Pages (from-to)2968-2983
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - Oct 2020


Dive into the research topics of 'The hestia project: Simulations of the Local Group'. Together they form a unique fingerprint.

Cite this