Cake Talk by Mitali Damle
The diffuse gaseous halos (circumgalactic medium or the CGM) around galaxies is not the most observable of all cosmic entities, however by regulating the baryon/metal flows through the galaxy, it ends up playing a rather important role in shaping many global galactic properties. I will present results on the Local Group galaxies' CGM from the Hestia simulations. We compute ion fractions for five tracer ions (assumed to be representative of the multiphase CGM) in these simulations and generate some mock predictions. We compare our results to the M31 observations and find that like other simulations, Hestia also does not produce enough metals at large radii. Further analysis also reveals that MW CGM could be partly responsible in boosting M31 observed ion densities, which ultimately contributes to the discrepancy between simulated and observed measurements.