On the relation between the mass of Compact Massive Objects and their host galaxies

Abstract

Supermassive black holes and/or very dense stellar clusters are found in the central regions of galaxies. Nuclear star clusters are present mainly in faint galaxies while upermassive black holes are common in galaxies with masses $\ge 10^{10}$ M${}_{\odot }$. In the intermediate galactic mass range both types of central massive objects (CMOs) are found. Here we present our collection of a huge set of nuclear star cluster and massive black hole data that enlarges significantly already existing data bases useful to investigate for correlations of their absolute magnitudes, velocity dispersions and masses with structural parameters of their host galaxies. In particular, we directed our attention to some differences between the correlations of nuclear star clusters and massive black holes as subsets of CMOs with hosting galaxies. In this context, the mass-velocity dispersion relation plays a relevant role because it seems the one that shows a clearer difference between the supermassive black holes and nuclear star clusters. The $M_{MBH}-\sigma$ has a slope of $5.19\pm 0.28$ while $M_{NSC}-\sigma$ has the much smaller slope of $1.84\pm 0.64$. The slopes of the CMO mass- host galaxy B magnitude of the two types of CMOs are indistinguishable within the errors while that of the NSC mass-host galaxy mass relation is significantly smaller than for supermassive black holes. Another important result is the clear depauperation of the NSC population in bright galaxy hosts, which reflects also in a clear flattening of the NSC mass vs host galaxy mass at high host masses.

12 pages, 22 figures, 2 tables, accepted for publication in MNRAS

References in corpus (15)

• The ACS Virgo Cluster Survey. VIII. The Nuclei of Early-Type Galaxies
• How Mergers May Affect The Mass Scaling Relations Between Black Holes, Galaxies, and Other Gravitationally Bound Systems
• The black hole mass -- stellar velocity dispersion correlation: bulges versus pseudobulges
• The Coincidence of Nuclear Star Clusters and Active Galactic Nuclei
• From Supermassive Black Holes to Dwarf Elliptical Nuclei: a Mass Continuum
• Nuclear star clusters in 228 spiral galaxies in the HST/WFPC2 archive: catalogue and comparison to other stellar systems
• The HST/ACS Coma Cluster Survey. X. Nuclear star clusters in low-mass early-type galaxies: scaling relations
• AMUSE-Virgo I. Super-massive black holes in low-mass spheroids
• Updated Mass Scaling Relations for Nuclear Star Clusters and a Comparison to Supermassive Black Holes
• The Globular Cluster Migratory Origin of Nuclear Star Clusters
• Dynamics of galaxy cores and supermassive black holes
• The Structure of Nuclear Star Clusters in Nearby Late-type Spiral Galaxies from Hubble Space Telescope Wide Field Camera 3 Imaging
• The supermassive black hole of Fornax A
• Overmassive black holes in the $M_{\mathrm{BH}}-\sigma$ diagram do not belong to over (dry) merged galaxies
• A Comparison Between the Globular Clusters in NGC 5128 and the Galaxy

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