# Feedback by Massive Black Holes in Dwarf Galaxies

## TL;DR

This paper hypothesizes that intermediate mass black holes are present in all old dwarf galaxies, potentially explaining various dwarf galaxy anomalies through early feedback mechanisms.

## Contribution

It proposes a radical hypothesis linking black holes to dwarf galaxy issues, supported by circumstantial evidence and test discussions, without needing to modify dark matter models.

## Key findings

- Active galactic nuclei in dwarfs support the hypothesis
- Black holes could explain dwarf galaxy anomalies
- No need to alter cold dark matter models

## Abstract

Could there be intermediate mass black holes in essentially all old dwarf galaxies? I argue that current observations of Active Galactic Nuclei in dwarfs allow such a radical hypothesis which provides early feedback and potentially provides a unifying explanation for many if not all of the apparent dwarf galaxy anomalies, such as the abundance, core-cusp, "too big to fail", ultra-faint and baryon-fraction issues. I describe the supporting arguments, which are largely circumstantial in nature, and discuss a number of tests. There is no strong motivation for modifying the nature of cold dark matter in order to explain any of the dwarf galaxy "problems".