The Coincidence of Nuclear Star Clusters and Active Galactic Nuclei

Abstract

We study galaxies that host both nuclear star clusters and active galactic nuclei (AGN) implying the presence of a massive black hole. We select a sample of 176 galaxies with previously detected nuclear star clusters that range from ellipticals to late-type spirals. We search for AGN in this sample using optical spectroscopy and archival radio and X-ray data. We find galaxies of all Hubble types and with a wide range of masses (10^9-11 solar masses) hosting both AGN and nuclear star clusters. From the optical spectra, we classify 10% of the galaxies as AGN and an additional 15% as composite, indicating a mix of AGN and star-formation spectra. The fraction of nucleated galaxies with AGN increases strongly as a function of galaxy and nuclear star cluster mass. For galaxies with both a NC and a black hole, we find that the masses of these two objects are quite similar. However, non-detections of black holes in Local Group nuclear star clusters show that not all clusters host black holes of similar masses. We discuss the implications of our results for the formation of nuclear star clusters and massive black holes.

Accepted for publication in ApJ. Version with high resolution figures available at http://www.cfa.harvard.edu/~aseth/nsc_agn_paper.pdf

References in corpus (15)

• The Host Galaxies and Classification of Active Galactic Nuclei
• The ACS Virgo Cluster Survey. VIII. The Nuclei of Early-Type Galaxies
• On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies
• The structure of the nuclear stellar cluster of the Milky Way
• Signals from the Noise: Image Stacking for Quasars in the FIRST Survey
• From Supermassive Black Holes to Dwarf Elliptical Nuclei: a Mass Continuum
• HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae
• Clues to Nuclear Star Cluster Formation from Edge-on Spirals
• X-ray nature of the LINER nuclear sources
• Radio Emission from the Intermediate-mass Black Hole in the Globular Cluster G1
• X-rays from the Globular Cluster G1: Intermediate Mass Black Hole or Low Mass X-ray Binary?
• The census of nuclear activity of late-type galaxies in the Virgo cluster
• Dissipative transformation of non-nucleated dwarf galaxies into nucleated systems
• The internal dynamics of the Local Group dwarf elliptical galaxies NGC147, NGC185, and NGC205
• Radio AGN in 13,240 galaxy clusters from the Sloan Digital Sky Survey

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• Appreciating mergers for understanding the non-linear $M_{\mathrm{bh}}$-$M_{\ast ,\mathrm{spheroid}}$ and $M_{\mathrm{bh}}$-$M_{\ast ,\mathrm{galaxy}}$ relations, updated herein, and the implications for the (reduced) role of AGN feedback
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• The Role of Nuclear Star Clusters in Enhancing Supermassive Black Hole Feeding Rates During Galaxy Mergers
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