The Dust Attenuation Scaling Relation of Star-Forming Galaxies in the EAGLE Simulations
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2024
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| author | Qiao, Man Zheng, Xian Zhong Katsianis, Antonios Qin, Jianbo Pan, Zhizheng Liu, Wenhao Tan, Qing-Hua An, Fang Xia Shi, Dong Dong Lü, Zongfei Zhang, Yuheng Wen, Run Liu, Shuang Yang, Chao |
| author_facet | Qiao, Man Zheng, Xian Zhong Katsianis, Antonios Qin, Jianbo Pan, Zhizheng Liu, Wenhao Tan, Qing-Hua An, Fang Xia Shi, Dong Dong Lü, Zongfei Zhang, Yuheng Wen, Run Liu, Shuang Yang, Chao |
| contents | Dust attenuation in star-forming galaxies (SFGs), as parameterized by the infrared excess (IRX $\equiv L_{\rm IR}/L_{\rm UV}$), is found to be tightly correlated with star formation rate (SFR), metallicity and galaxy size, following a universal IRX relation up to $z=3$. This scaling relation can provide a fundamental constraint for theoretical models to reconcile galaxy star formation, chemical enrichment, and structural evolution across cosmic time. We attempt to reproduce the universal IRX relation over $0.1\leq z\leq 2.5$ using the EAGLE hydrodynamical simulations and examine sensitive parameters in determining galaxy dust attenuation. Our findings show that while the predicted universal IRX relation from EAGLE approximately aligns with observations at $z\leq 0.5$, noticeable disparities arise at different stellar masses and higher redshifts. Specifically, we investigate how modifying various galaxy parameters can affect the predicted universal IRX relation in comparison to the observed data. We demonstrate that the simulated gas-phase metallicity is the critical quantity for the shape of the predicted universal IRX relation. We find that the influence of the infrared luminosity and infrared excess is less important while galaxy size has virtually no significant effect. Overall, the EAGLE simulations are not able to replicate some of the observed characteristics between IRX and galaxy parameters of SFGs, emphasizing the need for further investigation and testing for our current state-of-the-art theoretical models. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_02875 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Dust Attenuation Scaling Relation of Star-Forming Galaxies in the EAGLE Simulations Qiao, Man Zheng, Xian Zhong Katsianis, Antonios Qin, Jianbo Pan, Zhizheng Liu, Wenhao Tan, Qing-Hua An, Fang Xia Shi, Dong Dong Lü, Zongfei Zhang, Yuheng Wen, Run Liu, Shuang Yang, Chao Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Dust attenuation in star-forming galaxies (SFGs), as parameterized by the infrared excess (IRX $\equiv L_{\rm IR}/L_{\rm UV}$), is found to be tightly correlated with star formation rate (SFR), metallicity and galaxy size, following a universal IRX relation up to $z=3$. This scaling relation can provide a fundamental constraint for theoretical models to reconcile galaxy star formation, chemical enrichment, and structural evolution across cosmic time. We attempt to reproduce the universal IRX relation over $0.1\leq z\leq 2.5$ using the EAGLE hydrodynamical simulations and examine sensitive parameters in determining galaxy dust attenuation. Our findings show that while the predicted universal IRX relation from EAGLE approximately aligns with observations at $z\leq 0.5$, noticeable disparities arise at different stellar masses and higher redshifts. Specifically, we investigate how modifying various galaxy parameters can affect the predicted universal IRX relation in comparison to the observed data. We demonstrate that the simulated gas-phase metallicity is the critical quantity for the shape of the predicted universal IRX relation. We find that the influence of the infrared luminosity and infrared excess is less important while galaxy size has virtually no significant effect. Overall, the EAGLE simulations are not able to replicate some of the observed characteristics between IRX and galaxy parameters of SFGs, emphasizing the need for further investigation and testing for our current state-of-the-art theoretical models. |
| title | The Dust Attenuation Scaling Relation of Star-Forming Galaxies in the EAGLE Simulations |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2401.02875 |