We investigate the properties of galaxies as they shut off star formation over the 4 billion years surrounding peak cosmic star formation. To do this, we categorize ∼7000 galaxies from 1 < z < 4 into 90 groups based on the shape of their spectral energy distributions (SEDs) and build composite SEDs with R ∼ […]
Forrest et al. 2018, The Astrophysical Journal [Summary] [ADS] [arxiv]
Papovich et al. 2018, The Astrophysical Journal [Summary] [ADS] [arxiv]
Studies show the rate of quenching and the quiescent galaxy fraction are correlated with both increasing stellar mass and local environment. In the local Universe, these effects may be separable but in the more distant Universe, the evidence suggests otherwise. With ZFOURGE we studied the effects of galaxy environment on the evolution of the stellar–mass […]
Cowley et al. 2018, Monthly Notices of the Royal Astronomical Society [Summary] [ADS] [arxiv]
We investigate the SMBH-galaxy connection by tracking the mean black hole accretion rate (BHAR) and mean star formation rate (SFR) of a sample of galaxies out to z = 2:5. We perform X-ray stacking and SED decomposition to estimate BHARs and SFRs. While such studies are prevalent, they are often limited to AGN-selected or mass-limited […]
Kawinwanichakij et al. 2017, The Astrophysical Journal [Summary] [ADS] [arxiv]
In the low redshift Universe (z ~ 0.1), it has been shown that the respective relationships between stellar mass and environment on quenching are largely separable, implying there are two distinct quenching processes at work: one that correlates with stellar mass (independent of environment) and one that correlates with galaxy environment (independent of stellar mass). […]
Forrest et al. 2017, Astrophysical Journal Letters [Summary] [ADS] [arxiv]
10We construct a set of composite spectral energy distributions (SEDs) from ZFOURGE galaxies in 2.5<z<4.0 and SNR<20 (and removing those with evidence of active galactic nuclei). Included are two composite SEDs comprised of galaxies with particularly strong nebular emission features. The SEDs of these galaxies are consistent with young, blue, vigorously star-forming galaxies, analogous to […]