Resolving cosmic star formation histories of present-day bulges, disks, and spheroids with ProFuse

Understand

We present the first look at star formation histories of galaxy components using ProFuse, a new technique to model the 2D distribution of light across multiple wavelengths using simultaneous spectral and spatial fitting of purely imaging data.

• We present a number of methods to classify galaxies structurally/morphologically, showing the similarities and discrepancies between these schemes.
• We show the variation in component-wise mass functions that can occur simply due to the use of a different classification method, which is most dramatic in separating bulges and spheroids.
• Rather than identifying the best-performing scheme, we use the spread of classifications to quantify uncertainty in our results.