On the Origin of Star Formation Quenching of Galaxies in Group Environments Using the NewHorizon Simulation
Abstract We study star formation (SF) quenching of satellite galaxies with M * > 10 7 M ⊙ within two low-mass groups ( M vir = 10 12.9 and 10 12.7 M ⊙ ) using the NewHorizon simulation. We confirm that satellite galaxies ( M * ≲ 10 10 M ⊙ ) are more prone to quenching than their field counterparts. This quenched fraction decreases with increasing stellar mass, consistent with recent studies. Similar to the findings in cluster environments, we note a correlation between the orbital motions of galaxies within these groups and the phenomenon of SF quenching. Specifically, SF is suppressed at the group center, and for galaxies with M * > 10 9.1 M ⊙ , there is often a notable rejuvenation phase following a temporary quenching period. The SF quenching at the group center is primarily driven by changes in SF efficiency and the amount of gas available, both of which are influenced by hydrodynamic interactions between the interstellar medium and surrounding hot gas within the group. Conversely, satellite galaxies with M * < 10 8.2 M ⊙ experience significant gas removal within the group, leading to SF quenching. Our analysis highlights the complexity of SF quenching in satellite galaxies in group environments, which involves an intricate competition between the efficiency of SF (which depends on the dynamical state of the gas) on the one hand, and the availability of cold dense gas on the other hand. This challenges the typical understanding of environmental effects based on gas stripping through ram pressure, suggesting a need for a new description of galaxy evolution under mild environmental effects.
Authors
- Jinsu Rhee (ORCID: https://orcid.org/0000-0002-0184-9589)
- Christophe Pichon (ORCID: https://orcid.org/0000-0003-0695-6735)
- Jongwan Ko (ORCID: https://orcid.org/0000-0002-9434-5936)
- San Han (ORCID: https://orcid.org/0000-0001-9939-713X)
- J. K. Jang (ORCID: https://orcid.org/0000-0002-0858-5264)
- Sébastien Peirani (ORCID: https://orcid.org/0000-0001-6902-2898)
- Sukyoung K. Yi (ORCID: https://orcid.org/0000-0002-4556-2619)
- Emanuele Contini (ORCID: https://orcid.org/0000-0002-2873-8598)
- Seyoung Jeon (ORCID: https://orcid.org/0000-0002-1270-4465)
- Yohan Dubois (ORCID: https://orcid.org/0000-0003-0225-6387)
- Katarina Kraljic (ORCID: https://orcid.org/0000-0001-6180-0245)
Institutions
- Korea Institute for Advanced Study (KR)
- Centre National de la Recherche Scientifique (FR)
- Yonsei University (KR)
- Université Côte d'Azur (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Korea Astronomy and Space Science Institute (KR)
- Institut d'Astrophysique de Paris (FR)
- Observatoire astronomique de Strasbourg (FR)
- Sorbonne Université (FR)
- Laboratoire des Sciences du Climat et de l'Environnement (FR)
- Observatoire de la Côte d’Azur (FR)
- Université de Strasbourg (FR)
- The University of Tokyo (JP)
- Korea University of Science and Technology (KR)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2024-08-01
- DOI
- https://doi.org/10.3847/1538-4357/ad5a83
- Citations
- 7
- Primary Topic
- Galaxies: Formation, Evolution, Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 2.32
Funders
- National Science Foundation
- National Research Foundation
- Agence Nationale de la Recherche
- Yonsei University
- Korea Institute of Science and Technology Information
- Korea Astronomy and Space Science Institute
- Grand Équipement National De Calcul Intensif
- Ministry of Science and ICT, South Korea
- Japan Society for the Promotion of Science
- Kavli Institute for Theoretical Physics, University of California, Santa Barbara