Inflow of low-metallicity cool gas in the halo of the Andromeda galaxy
Andrea Afruni,
Gabriele Pezzulli,
Filippo Fraternali
Abstract:As the closest 𝐿 * galaxy to our own Milky Way, the Andromeda galaxy (M31) is an ideal laboratory for studies of galaxy evolution. The AMIGA project has recently provided observations of the cool (𝑇 ∼ 10 4 K) phase of the circumgalactic medium (CGM) of M31, using HST/COS absorption spectra along ∼ 40 background QSO sightlines, located up to and beyond the galaxy virial radius. Based on these data, and by the means of semi-analytic models and Bayesian inference, we provide here a physical description of the o… Show more
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