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Journal Article

Exploring the Limits of AGN Feedback: Black Holes and the Star Formation Histories of Low-mass Galaxies

MPS-Authors

Martín-Navarro,  I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mezcua,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018ApJ...855L..20M
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Citation

Martín-Navarro, I., & Mezcua, M. (2018). Exploring the Limits of AGN Feedback: Black Holes and the Star Formation Histories of Low-mass Galaxies. The Astrophysical Journal, 855.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CC4C-1
Abstract
Energy feedback, either from active galactic nuclei (AGNs) or from supernovae, is required to understand galaxy formation within a Λ-cold dark matter cosmology. We study a sample of 127 low-mass galaxies, comparing their stellar population properties to the mass of the central supermassive black hole, in order to investigate the effect of AGN feedback. We find a loose coupling between star formation history and black hole mass, which seems to suggest that AGN activity does not dominate baryonic cooling in low-mass galaxies. We also find that a break in the {M}\bullet -σ relation marks a transitional stellar mass, M trans = (3.4 ± 2.1) × 1010 {M}☉ , remarkably similar to {M}\star . Our results are in agreement with a bi-modal star formation process where the AGN-dominated feedback of high-mass galaxies transitions toward a supernovae-driven regime in low-mass systems, as suggested by numerical simulations.