Revealing the Impact of Critical Stellar Central Density on Galaxy Quenching through Cosmic Time

  • Xu B
  • Peng Y
0Citations
Citations of this article
10Readers
Mendeley users who have this article in their library.

Abstract

In a previous work, we investigated the structural and environmental dependence on quenching in the nearby universe. In this work, we extend our investigations to higher redshifts by combining galaxies from the Sloan Digital Sky Survey and The FourStar Galaxy Evolution surveys. In low density, we find a characteristic Σ 1 kpc above which the quenching is initiated as indicated by their population-averaged color. Σ 1 kpc crit shows only a weak mass dependency at all redshifts, which suggests that the internal quenching process is more related to the physics that acts in the central region of galaxies. In high density, Σ 1 kpc crit for galaxies at z > 1 is almost indistinguishable from their low-density counterparts. At z < 1, Σ 1 kpc crit for low-mass galaxies becomes progressively strongly mass dependent, which is due to the increasingly stronger environmental effects at lower redshifts. Σ 1 kpc crit in low density shows strong redshift evolution with ∼1 dex decrement from z = 2.5–0. It is likely that at a given stellar mass, the host halo is on average more massive and gas-rich at higher redshifts; hence, a higher level of integrated energy from a more massive black hole (BH) is required to quench. As the halo evolves from the cold to hot accretion phase at lower redshifts, the gas is shock-heated and becomes more vulnerable to the feedback processes from active galactic nucleus as predicted by theory. Meanwhile, angular momentum quenching also becomes more effective at low redshifts, which complements a lower level of integrated energy from the BH to quench.

Cite

CITATION STYLE

APA

Xu, B., & Peng, Y. (2024). Revealing the Impact of Critical Stellar Central Density on Galaxy Quenching through Cosmic Time. The Astrophysical Journal, 963(1), 15. https://doi.org/10.3847/1538-4357/ad1104

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free