Unraveling the Complexity of Dwarf Galaxy Dynamics: A study of Binary Orbital Motions

2023/06/07 by Wenting Wang, Zhu Ling, Wang, Wenting +19 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.2306.04311

openalex publication_date 2023/06/07 · openalex created_date 2023/06/09 · openalex updated_date 2026/07/28

Abstract

We investigate the impact of binary orbital motions on the dynamical modeling of dwarf galaxies with intrinsic line-of-sight velocity dispersions (σ_vr) of 1 to 9 km/s. Using dwarf galaxies from the Auriga level-2 and level-3 simulations, we apply the Jeans Anisotropic Multi-Gaussian Expansion modelling to tracer stars before and after including binaries to recover the dynamical masses. The recovered total masses within the half-mass radius of tracers, M(

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