Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations
We investigate the influence of the cosmic web on galaxy properties in the IllustrisTNG simulations. To disentangle the effects of galaxy groups and cosmic filaments, we divide the cosmic web environment into four categories: group, group-dominated region, filament-dominated region, and field. By co...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc80f |
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| author | Guangyao Yu Weishan Zhu Qi-Rui Yang Jian-Feng Mo Tian-Cheng Luan Long-Long Feng |
| author_facet | Guangyao Yu Weishan Zhu Qi-Rui Yang Jian-Feng Mo Tian-Cheng Luan Long-Long Feng |
| author_sort | Guangyao Yu |
| collection | DOAJ |
| description | We investigate the influence of the cosmic web on galaxy properties in the IllustrisTNG simulations. To disentangle the effects of galaxy groups and cosmic filaments, we divide the cosmic web environment into four categories: group, group-dominated region, filament-dominated region, and field. By controlling for stellar mass, we reveal evident differences in specific star formation rates (sSFRs), quenched fraction, gas fractions, local density, and stellar ages among central galaxies in different cosmic web environments, particularly for lower-mass galaxies. However, these differences largely diminish when the effect of local overdensity is further accounted for, indicating its dominant role. Additionally, we observe distinct differences in these properties among satellite galaxies across environments, mainly driven by stellar mass, halo mass, and overdensity. Notably, residual differences between satellites in field and filament-dominated regions persist even after controlling for these factors, suggesting a stronger susceptibility of satellite galaxies to filaments compared to central galaxies. Our findings highlight the importance of differentiating between central and satellite to accurately assess the environmental effects of the cosmic web. Our analysis suggests that the relationship between galaxy properties and their distance from filaments arises from a combination of factors, including stellar and halo mass, groups, overdensity, and the intrinsic influence of the cosmic web. Additionally, we find that the effect of the cosmic web on galaxy properties is reduced at z = 0.5, compared to z = 0. Furthermore, central galaxies near thick filaments tend to exhibit slightly to moderately lower sSFR and cold gas fractions compared to those near thin filaments. |
| format | Article |
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| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-ceba83e2194d4ed4b9acd60a61ba4d712025-08-20T02:07:12ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01986219310.3847/1538-4357/adc80fImpact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG SimulationsGuangyao Yu0https://orcid.org/0009-0001-6368-2833Weishan Zhu1https://orcid.org/0000-0002-1189-2855Qi-Rui Yang2Jian-Feng Mo3Tian-Cheng Luan4https://orcid.org/0009-0001-6592-6467Long-Long Feng5https://orcid.org/0000-0002-3105-2191School of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-Sen University , Zhuhai campus, No. 2, Daxue Road, Zhuhai, Guangdong 519082, People’s Republic of China ; zhuwshan5@mail.sysu.edu.cn; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area , Daxue Road 2, Zhuhai 519082, People’s Republic of ChinaWe investigate the influence of the cosmic web on galaxy properties in the IllustrisTNG simulations. To disentangle the effects of galaxy groups and cosmic filaments, we divide the cosmic web environment into four categories: group, group-dominated region, filament-dominated region, and field. By controlling for stellar mass, we reveal evident differences in specific star formation rates (sSFRs), quenched fraction, gas fractions, local density, and stellar ages among central galaxies in different cosmic web environments, particularly for lower-mass galaxies. However, these differences largely diminish when the effect of local overdensity is further accounted for, indicating its dominant role. Additionally, we observe distinct differences in these properties among satellite galaxies across environments, mainly driven by stellar mass, halo mass, and overdensity. Notably, residual differences between satellites in field and filament-dominated regions persist even after controlling for these factors, suggesting a stronger susceptibility of satellite galaxies to filaments compared to central galaxies. Our findings highlight the importance of differentiating between central and satellite to accurately assess the environmental effects of the cosmic web. Our analysis suggests that the relationship between galaxy properties and their distance from filaments arises from a combination of factors, including stellar and halo mass, groups, overdensity, and the intrinsic influence of the cosmic web. Additionally, we find that the effect of the cosmic web on galaxy properties is reduced at z = 0.5, compared to z = 0. Furthermore, central galaxies near thick filaments tend to exhibit slightly to moderately lower sSFR and cold gas fractions compared to those near thin filaments.https://doi.org/10.3847/1538-4357/adc80fGalaxy evolutionLarge-scale structure of the universeCosmic webHydrodynamical simulations |
| spellingShingle | Guangyao Yu Weishan Zhu Qi-Rui Yang Jian-Feng Mo Tian-Cheng Luan Long-Long Feng Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations The Astrophysical Journal Galaxy evolution Large-scale structure of the universe Cosmic web Hydrodynamical simulations |
| title | Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations |
| title_full | Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations |
| title_fullStr | Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations |
| title_full_unstemmed | Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations |
| title_short | Impact of the Cosmic Web on the Properties of Galaxies in IllustrisTNG Simulations |
| title_sort | impact of the cosmic web on the properties of galaxies in illustristng simulations |
| topic | Galaxy evolution Large-scale structure of the universe Cosmic web Hydrodynamical simulations |
| url | https://doi.org/10.3847/1538-4357/adc80f |
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