On the origin of the $Σ_1$-$M_\star$ quenching boundary
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866910817358708736 |
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| author | Cattaneo, Andrea Dimauro, Paola Koutsouridou, Ioanna |
| author_facet | Cattaneo, Andrea Dimauro, Paola Koutsouridou, Ioanna |
| contents | We have considered a phenomenologically motivated model in which galaxies are quenched when the energy output of the central black hole exceeds a hundred times the gravitational binding energy of the baryons in the host halo. The model reproduces the mass functions of star-forming and quiescent galaxies at 0<z<2.5 and the quenching boundary on a $Σ_1$-stellar mass diagram. The quenching boundary arises because of the colour-morphology relation. The stellar surface density $Σ_1$ in the central kiloparsec is a morphological indicator. Galaxies becomes redder as $Σ_1$ increases until they cross the quenching boundary and enter the passive population. Mergers drive the growth of supermassive black holes and the morphological evolution that accompany the migration to the red sequence. That is the origin of the population of high-mass passive galaxies. At lower masses, passive galaxies are mainly satellites that ceased to form stars because of environmental effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04319 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the origin of the $Σ_1$-$M_\star$ quenching boundary Cattaneo, Andrea Dimauro, Paola Koutsouridou, Ioanna Astrophysics of Galaxies We have considered a phenomenologically motivated model in which galaxies are quenched when the energy output of the central black hole exceeds a hundred times the gravitational binding energy of the baryons in the host halo. The model reproduces the mass functions of star-forming and quiescent galaxies at 0<z<2.5 and the quenching boundary on a $Σ_1$-stellar mass diagram. The quenching boundary arises because of the colour-morphology relation. The stellar surface density $Σ_1$ in the central kiloparsec is a morphological indicator. Galaxies becomes redder as $Σ_1$ increases until they cross the quenching boundary and enter the passive population. Mergers drive the growth of supermassive black holes and the morphological evolution that accompany the migration to the red sequence. That is the origin of the population of high-mass passive galaxies. At lower masses, passive galaxies are mainly satellites that ceased to form stars because of environmental effects. |
| title | On the origin of the $Σ_1$-$M_\star$ quenching boundary |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2502.04319 |