The Faber–Jackson relation and Fundamental Plane from halo abundance matching
The Fundamental Plane (FP) describes the relation between the stellar mass, size, and velocity dispersion of elliptical galaxies; the Faber–Jackson relation (FJR) is its projection on to {mass, velocity} space. In this work, we re-deploy and expand the framework of Desmond & Wechsler to ask...
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| Format: | Journal article |
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Oxford University Press
2016
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| _version_ | 1797068296083734528 |
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| author | Desmond, H Wechsler, R |
| author_facet | Desmond, H Wechsler, R |
| author_sort | Desmond, H |
| collection | OXFORD |
| description | The Fundamental Plane (FP) describes the relation between the stellar mass, size, and velocity dispersion of elliptical galaxies; the Faber–Jackson relation (FJR) is its projection on to {mass, velocity} space. In this work, we re-deploy and expand the framework of Desmond & Wechsler to ask whether abundance matching-based Λ-cold dark matter models which have shown success in matching the spatial distribution of galaxies are also capable of explaining key properties of the FJR and FP, including their scatter. Within our framework, agreement with the normalization of the FJR requires haloes to expand in response to disc formation.We find that the tilt of the FP may be explained by a combination of the observed non-homology in galaxy structure and the variation in mass-to-light ratio produced by abundance matching with a universal initial mass function, provided that the anisotropy of stellar motions is taken into account. However, the predicted scatter around the FP is considerably increased by situating galaxies in cosmologically motivated haloes due to the variations in halo properties at fixed stellar mass and appears to exceed that of the data. This implies that additional correlations between galaxy and halo variables may be required to fully reconcile these models with elliptical galaxy scaling relations. |
| first_indexed | 2024-03-06T22:08:41Z |
| format | Journal article |
| id | oxford-uuid:510dfd06-8089-46ee-b62c-253678f83b50 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:08:41Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:510dfd06-8089-46ee-b62c-253678f83b502022-03-26T16:17:11ZThe Faber–Jackson relation and Fundamental Plane from halo abundance matchingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:510dfd06-8089-46ee-b62c-253678f83b50Symplectic Elements at OxfordOxford University Press2016Desmond, HWechsler, RThe Fundamental Plane (FP) describes the relation between the stellar mass, size, and velocity dispersion of elliptical galaxies; the Faber–Jackson relation (FJR) is its projection on to {mass, velocity} space. In this work, we re-deploy and expand the framework of Desmond & Wechsler to ask whether abundance matching-based Λ-cold dark matter models which have shown success in matching the spatial distribution of galaxies are also capable of explaining key properties of the FJR and FP, including their scatter. Within our framework, agreement with the normalization of the FJR requires haloes to expand in response to disc formation.We find that the tilt of the FP may be explained by a combination of the observed non-homology in galaxy structure and the variation in mass-to-light ratio produced by abundance matching with a universal initial mass function, provided that the anisotropy of stellar motions is taken into account. However, the predicted scatter around the FP is considerably increased by situating galaxies in cosmologically motivated haloes due to the variations in halo properties at fixed stellar mass and appears to exceed that of the data. This implies that additional correlations between galaxy and halo variables may be required to fully reconcile these models with elliptical galaxy scaling relations. |
| spellingShingle | Desmond, H Wechsler, R The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title | The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title_full | The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title_fullStr | The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title_full_unstemmed | The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title_short | The Faber–Jackson relation and Fundamental Plane from halo abundance matching |
| title_sort | faber jackson relation and fundamental plane from halo abundance matching |
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