Spectral energy distribution similarity of the local galaxies and the 3.6um selected galaxies from the Spitzer Extended Deep Survey

TL;DR

This study demonstrates that high-redshift galaxies ($z \,\sim\,1$) share similar spectral energy distribution templates with local galaxies, based on a large mid-infrared survey and multi-wavelength analysis.

Contribution

It shows that local galaxy templates can effectively fit high-redshift galaxy SEDs, supporting their use in studying distant galaxy properties.

Findings

High-redshift ($z \,\sim\,1$) galaxies share SED templates with local galaxies.

The SED fitting with local templates is highly successful for the SEDS sample.

The results aid in understanding galaxy luminosity and mass functions at high redshift.

Abstract

The Spitzer Extended Deep Survey (SEDS) as a deep and wide mid-infrared (MIR) survey project provides a sample of 500000+ sources spreading 1.46 square degree and a depth of 26 AB mag (3$\sigma$). Combining with the previous available data, we build a PSF-matched multi-wavelength photometry catalog from u band to 8$\mu$m. We fit the SEDS galaxies spectral energy distributions by the local galaxy templates. The results show that the SEDS galaxy can be fitted well, indicating the high redshift galaxy ($z \sim 1$) shares the same templates with the local galaxies. This study would facilitate the further study of the galaxy luminosity and high redshift mass function.