Nuclear X-ray Activity in Low-Surface-Brightness Galaxies: Prospects for Constraining the Local Black Hole Occupation Fraction with a Chandra Successor Mission
arXiv:2006.16342 · doi:10.3847/1538-4357/ab9ffa
Abstract
About half of nearby galaxies have a central surface brightness >1 magnitude below that of the sky. The overall properties of these low-surface-brightness galaxies (LSBGs) remain understudied, and in particular we know very little about their massive black hole population. This gap must be closed to determine the frequency of massive black holes at z=0 as well as to understand their role in regulating galaxy evolution. Here we investigate the incidence and intensity of nuclear, accretion-powered X-ray emission in a sample of 32 nearby LSBGs with the Chandra X-ray Observatory. A nuclear X-ray source is detected in 4 galaxies (12.5%). Based on an X-ray binary contamination assessment technique developed for normal galaxies, we conclude that the detected X-ray nuclei indicate low-level accretion from massive black holes. The active fraction is consistent with that expected from the stellar mass distribution of the LSBGs, but not their total baryonic mass, when using a scaling relation from an unbiased X-ray survey of normal galaxies. This suggests that their black holes co-evolved with their stellar population. In addition, the apparent agreement nearly doubles the number of galaxies available within ~100 Mpc for which a measurement of nuclear activity can efficiently constrain the frequency of black holes as a function of stellar mass. We conclude by discussing the feasibility of measuring this occupation fraction to a few percent precision below 1e10 solar masses with high-resolution, wide-field X-ray missions currently under consideration.
17 pages, accepted by ApJ
References in corpus (14)
- The Host Galaxies and Classification of Active Galactic Nuclei
- HyperLEDA. III. The catalogue of extragalactic distances
- A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
- The Coincidence of Nuclear Star Clusters and Active Galactic Nuclei
- X-ray constraints on the local supermassive black hole occupation fraction
- X-ray Binary Luminosity Function Scaling Relations for Local Galaxies Based on Subgalactic Modeling
- AMUSE-Virgo I. Super-massive black holes in low-mass spheroids
- Hunting for Supermassive Black Holes in Nearby Galaxies with the Hobby-Eberly Telescope
- Metallicity dependence of HMXB populations
- Chandra Survey of Nearby Galaxies: A Significant Population of Candidate Central Black Holes in Late-type Galaxies
- Low Surface Brightness Galaxies around the HDF-S: II. Distances and volume densities
- The Faint End Slopes Of Galaxy Luminosity Functions In The COSMOS 2-Square Degree Field
- A Study of Active Galactic Nuclei in Low Surface Brightness Galaxies with Sloan Digital Sky Survey Spectroscopy
- Sub-Eddington super-massive black hole activity in Fornax early type galaxies