We investigate how cosmic web structures affect galaxy quenching in the IllustrisTNG (TNG100) cosmological simulations by reconstructing the cosmic web within each snapshot using the D
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Abstract is Per SE framework. We measure the comoving distance from each galaxy with stellar mass to the nearest node (d node) and the nearest filament spine (d fil) to study the dependence of both the median specific star formation rate (〈sSFR〉) and the median gas fraction (〈f gas〉) on these distances. We find that the 〈sSFR〉 of galaxies is only dependent on the cosmic web environment atz < 2, with the dependence increasing with time. Atz ≤ 0.5, galaxies are quenched atd node≲ 1 Mpc, and have significantly suppressed star formation atd fil≲ 1 Mpc, trends driven mostly by satellite galaxies. Atz ≤ 1, in contrast to the monotonic drop in 〈sSFR〉 of galaxies with decreasingd nodeandd fil, galaxies—both centrals and satellites—experience an upturn in 〈sSFR〉 atd node≲ 0.2 Mpc. Much of this cosmic web dependence of star formation activity can be explained by an evolution in 〈f gas〉. Our results suggest that in the past ∼10 Gyr, low-mass satellites are quenched by rapid gas stripping in dense environments near nodes and gradual gas starvation in intermediate-density environments near filaments. At earlier times, cosmic web structures efficiently channeled cold gas into most galaxies. State-of-the-art ongoing spectroscopic surveys such as the Sloan Digital Sky Survey and DESI, as well as those planned with the Subaru Prime Focus Spectrograph, JWST, and Roman, are required to test our predictions against observations. -
Simha, Sunil ; Burchett, Joseph N. ; Prochaska, J. Xavier ; Chittidi, Jay S. ; Elek, Oskar ; Tejos, Nicolas ; Jorgenson, Regina ; Bannister, Keith W. ; Bhandari, Shivani ; Day, Cherie K. ; et al ( , The Astrophysical Journal)null (Ed.)