The extended disc and halo of the Andromeda galaxy observed with Spitzer-IRAC

Masoud Rafiei Ravandi, Pauline Barmby, Matthew L. N. Ashby +6

We present the first results from an extended survey of the Andromeda galaxy (M31) using 41.1 h of observations by Spitzer-IRAC at 3.6 and 4.5$\mu$m. This survey extends previous o…