# Spatially resolved stellar mass buildup and quenching in massive disk galaxies over the last 10 Gyr revealed with spatially resolved SED fitting

## TL;DR

This study uses spatially resolved SED fitting to analyze how massive disk galaxies have built up their stellar mass and quenched star formation from the center outward over the last 10 billion years.

## Contribution

It introduces a pixel-to-pixel SED fitting method to investigate spatially resolved stellar mass buildup and quenching in massive disk galaxies across cosmic time.

## Key findings

- Massive disk galaxies grow their stellar mass from inside-out.
- Star formation quenching also proceeds from the center outward.
- The inside-out pattern is consistent over the last 10 Gyr.

## Abstract

Despite decreasing cosmic star formation rate density over the last 10 Gyr, the stellar mass ($M_{*}$) buildups in galaxies were still progressing during this epoch. About 50\% of the current $M_{*}$ density in the universe was built over the last $\sim 8.7$ Gyr. In this research, we investigated the stellar mass buildup and quenching of spatially resolved regions within massive disk galaxies over the last 10 Gyr. We apply the spectral energy distribution (SED) fitting method to SEDs of sub-galactic regions in galaxies to derive the spatially resolved distributions of SFR and $M_{*}$ in the galaxies. This namely \textit{pixel-to-pixel SED fitting} method is applied to massive disk galaxies at $0.01<z<0.02$ and $0.8<z<1.8$. We found that massive disk galaxies tend to build their $M_{*}$ and quench their star formation progressively from the central region to the outskirts, i.e. \textit{inside-out} stellar mass buildup and quenching.