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Satellite Quenching and Galactic Conformity at 0.3 < z < 2.5 by Kawinwanichakij, Lalitwadee; Quadri, Ryan F.; Papovich, Casey; Kacprzak, Glenn G.; Labbé, Ivo; Spitler, Lee R.; Straatman, Caroline; Tran, Kim-Vy; Allen, Rebecca; Behroozi, Peter S.; Cowley, Michael; Dekel, Avishai; Glazebrook, Karl; Hartley, William G.; Kelson, Daniel D.; Koo, David C.; Lee, Seong-Kook; Lu, Yu; Nanayakkara, Themiya; Persson, Eric; Primack, Joel R.; Tilvi, Vithal; Tomczak, Adam R.; van Dokkum, Pieter is a scholarly article available to read on EtoBox.

What is Satellite Quenching and Galactic Conformity at 0.3 < z < 2.5 about?

We measure the evolution of the quiescent fraction and quenching efficiency of satellites around star-forming and quiescent central galaxies with stellar mass $\log(M_{\mathrm{cen}}/M_{\odot})>10.5$ at $0.3<z<2.5$. We combine imaging from three deep near-infrared-selected surveys (ZFOURGE/CANDELS, UDS, and UltraVISTA), which allows us to select a stellar-mass complete sample of satellites with $\log(M_{\mathrm{sat}}/M_{\odot})>9.3$. Satellites for both star-forming and quiescent central galaxies have higher quiescent fractions compared to field galaxies matched in stellar mass at all redshifts. We also observe "galactic conformity": satellites around quiescent centrals are more likely to be quenched compared to the satellites around star-forming centrals. In our sample, this conformity signal is significant at $\gtrsim3\sigma$ for $0.6<z<1.6$, whereas it is only weakly significant at $0.3<z<0.6$ and $1.6<z<2.5$. Therefore, conformity (and therefore satellite quenching) has been present for a significant fraction of the age of the universe. The satellite quenching efficiency increases with increasing stellar mass of the central, but does not appear to depend on the stellar mass of t

Author

Kawinwanichakij, Lalitwadee; Quadri, Ryan F.; Papovich, Casey; Kacprzak, Glenn G.; Labbé, Ivo; Spitler, Lee R.; Straatman, Caroline; Tran, Kim-Vy; Allen, Rebecca; Behroozi, Peter S.; Cowley, Michael; Dekel, Avishai; Glazebrook, Karl; Hartley, William G.; Kelson, Daniel D.; Koo, David C.; Lee, Seong-Kook; Lu, Yu; Nanayakkara, Themiya; Persson, Eric; Primack, Joel R.; Tilvi, Vithal; Tomczak, Adam R.; van Dokkum, Pieter

Published

2015

Language

EN