A dust attenuation model inspired by the NIHAO-SKIRT-Catalog
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866909078241935360 |
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| author | Faucher, Nicholas Blanton, Michael R. |
| author_facet | Faucher, Nicholas Blanton, Michael R. |
| contents | We use simulated attenuation curves from the NIHAO-SKIRT-Catalog to test the flexibility of commonly used dust attenuation models in the face of the variations expected from realistic star-dust geometries. Motivated by lack of flexibility in these existing models, we propose a novel dust attenuation model with three free parameters that can accurately recover the simulated attenuation curves as well as the best-fitting curves from the commonly used models. This new model is fully analytic and treats all starlight equally, in contrast to two-component dust attenuation models. We use the parametrization to investigate the relationship between the overall attenuation law shape and the strength of the 2175 Å bump. Our results indicate variation in star-dust geometry leads these features to correlate tightly, with grayer attenuation curves having weaker bumps. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_11007 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A dust attenuation model inspired by the NIHAO-SKIRT-Catalog Faucher, Nicholas Blanton, Michael R. Astrophysics of Galaxies We use simulated attenuation curves from the NIHAO-SKIRT-Catalog to test the flexibility of commonly used dust attenuation models in the face of the variations expected from realistic star-dust geometries. Motivated by lack of flexibility in these existing models, we propose a novel dust attenuation model with three free parameters that can accurately recover the simulated attenuation curves as well as the best-fitting curves from the commonly used models. This new model is fully analytic and treats all starlight equally, in contrast to two-component dust attenuation models. We use the parametrization to investigate the relationship between the overall attenuation law shape and the strength of the 2175 Å bump. Our results indicate variation in star-dust geometry leads these features to correlate tightly, with grayer attenuation curves having weaker bumps. |
| title | A dust attenuation model inspired by the NIHAO-SKIRT-Catalog |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2401.11007 |