# Evaluating galaxy dynamical masses from kinematics and jeans equilibrium in simulations

@article{Kretschmer2020EvaluatingGD,
title={Evaluating galaxy dynamical masses from kinematics and jeans equilibrium in simulations},
author={Michael Kretschmer and Avishai Dekel and Jonathan Freundlich and Sharon Lapiner and Daniel Ceverino and Joel R. Primack},
journal={arXiv: Astrophysics of Galaxies},
year={2020}
}
• Published 9 October 2020
• Physics
• arXiv: Astrophysics of Galaxies
We provide prescriptions to evaluate the dynamical mass ($M_{\rm dyn}$) of galaxies from kinematic measurements of stars or gas using analytic considerations and the VELA suite of cosmological zoom-in simulations at $z=1-5$. We find that Jeans or hydrostatic equilibrium is approximately valid for galaxies of stellar masses above $M_\star \!\sim\! 10^{9.5}M_\odot$ out to $5$ effective radii ($R_e$). When both measurements of the rotation velocity $v_\phi$ and of the radial velocity dispersion…
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