TY - JOUR
T1 - Quenching in cosmic sheets
T2 - tracing the impact of large-scale structure collapse on the evolution of dwarf galaxies
AU - Pasha, Imad
AU - Mandelker, Nir
AU - van den Bosch, Frank C.
AU - Springel, Volker
AU - van de Voort, Freeke
N1 - Funding Information: The authors thank the anonymous referee for useful comments that improved the quality of the manuscript. The authors thank Ruediger Pakmor for helpful discussions and for their considerable aid in getting the simulation I/O scripts installed on a problematic compute node. This work was partly funded by the Klauss Tschira Foundation through the HITS Yale Program in Astrophysics (HYPA). IP was supported by the National Science Foundation Graduate Research Fellowship Program under grant no. DGE1752134. NM acknowledges support from Bi-national Science Foundation under grant number BSF 2020302, from the Gordon and Betty Moore Foundation through Grant GBMF7392, and from the National Science Foundation under grant no. NSF PHY1748958. FvdB is supported by the National Aeronautics and Space Administration through grant no. 19-ATP19-0059 issued as part of the Astrophysics Theory Program. FvdV was supported by a Royal Society University Research Fellowship. This research has made use of NASA’s Astrophysics Data System Bibliographic Services. Publisher Copyright: © 2022 The Author(s).
PY - 2023/4/1
Y1 - 2023/4/1
N2 - Dwarf galaxies are thought to quench primarily due to environmental processes most typically occurring in galaxy groups and clusters or around single, massive galaxies. However, at earlier epochs, (5 < z < 2), the collapse of large-scale structure (forming Zel’dovich sheets and subsequently filaments of the cosmic web) can produce volume-filling accretion shocks which elevate large swaths of the intergalactic medium (IGM) in these structures to a hot (T > 106 K) phase. We study the impact of such an event on the evolution of central dwarf galaxies (5.5 < log M∗ < 8.5) in the field using a spatially large, high resolution cosmological zoom simulation which covers the cosmic web environment between two protoclusters. We find that the shock-heated sheet acts as an environmental quencher much like clusters and filaments at lower redshift, creating a population of quenched, central dwarf galaxies. Even massive dwarfs that do not quench are affected by the shock, with reductions to their sSFR and gas accretion. This process can potentially explain the presence of isolated quenched dwarf galaxies, and represents an avenue of pre-processing, via which quenched satellites of bound systems quench before infall.
AB - Dwarf galaxies are thought to quench primarily due to environmental processes most typically occurring in galaxy groups and clusters or around single, massive galaxies. However, at earlier epochs, (5 < z < 2), the collapse of large-scale structure (forming Zel’dovich sheets and subsequently filaments of the cosmic web) can produce volume-filling accretion shocks which elevate large swaths of the intergalactic medium (IGM) in these structures to a hot (T > 106 K) phase. We study the impact of such an event on the evolution of central dwarf galaxies (5.5 < log M∗ < 8.5) in the field using a spatially large, high resolution cosmological zoom simulation which covers the cosmic web environment between two protoclusters. We find that the shock-heated sheet acts as an environmental quencher much like clusters and filaments at lower redshift, creating a population of quenched, central dwarf galaxies. Even massive dwarfs that do not quench are affected by the shock, with reductions to their sSFR and gas accretion. This process can potentially explain the presence of isolated quenched dwarf galaxies, and represents an avenue of pre-processing, via which quenched satellites of bound systems quench before infall.
KW - galaxies: dwarf
KW - galaxies: evolution
KW - galaxies: high-redshift
KW - galaxies: star formation
KW - intergalactic medium
KW - methods: numerical
UR - http://www.scopus.com/inward/record.url?scp=85147151693&partnerID=8YFLogxK
U2 - https://doi.org/10.1093/mnras/stac3776
DO - https://doi.org/10.1093/mnras/stac3776
M3 - Article
SN - 0035-8711
VL - 520
SP - 2692
EP - 2708
JO - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
JF - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IS - 2
ER -