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Ongoing deep IFS observations of disk galaxies provide opportunities forcomparison with the Milky Way (MW) to understand galaxy evolution. However,such comparisons are marred by many challenges such as selection effects,differences in observations and methodology, and proper validation offull-spectrum fitting methods. In this study, we present a novel code GalCraftto address these challenges by generating mock IFS data cubes of the MW usingsimple stellar population models and a mock MW stellar catalog derived fromE-Galaxia. We use the widely adopted full-spectrum fitting code pPXF toinvestigate the ability to recover kinematics and stellar populations for anedge-on mock MW IFS observation. We confirm that differences in kinematics,mean age, [M/H], and [$\alpha$/Fe] between thin and thick disks can bedistinguished. However, the age distribution is overestimated in the rangesbetween 2 - 4 and 12 - 14 Gyr compared to the expected values. This is likelydue to the age spacing and degeneracy of SSP templates. We find systematicoffsets in the recovered kinematics due to insufficient spectral resolution andthe variation of line-of-sight velocity distribution with age and [M/H]. Withfuture higher resolution and multi-[$\alpha$/Fe] SSP templates, GalCraft willbe useful to validate key signatures such as [$\alpha$/Fe]-[M/H] distributionat different $R$ and $|z|$ and potentially infer radial migration and kinematicheating efficiency to study detailed chemodynamical evolution of MW-likegalaxies.

Validating full-spectrum fitting with a synthetic integral-field spectroscopic observation of the Milky Way