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EA: Kinematics of the Local Group gas and galaxies in the Hestia simulations – Biaus

April 21 @ 12:30 pm 12:45 pm CMT

We investigate the kinematic properties of gas and galaxies in the Local Group (LG) using a suite of high-resolution simulations performed by the Hestia (High-resolution Environmental Simulations of The Immediate Area) collaboration. Our simulations include the correct cosmography surrounding the LG-like regions such as the Virgo cluster, the local void and the local filament. The simulated LGs consist of two main spiral galaxies of ~10^12 solar masses, their satellites and minor isolated galaxies, all sharing the same large-scale motion within a volume of a few Mpc. With this study, we are aiming at characterizing the gas and galaxy kinematics within the simulated LGs from the perspective of the Sun to compare the observed trends with recent HST/COS absorption-line observations and LG galaxy data. To analyze the velocity dipole pattern for LG gas and galaxies seen in the observational data, we build sky maps from the local standard of rest, and other reference systems such as the galactic and local group barycentre frames, as seen by an observer sitting in the model Milky Way.

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