Do Intermediate-Mass Black Holes Exist in Globular Clusters?

Abstract

The existence of intermediate-mass black holes (IMBHs) in globular clusters (GCs) remains a crucial problem. Searching IMBHs in GCs reveals a discrepancy between radio observations and dynamical modelings: the upper mass limits constrained by radio observations are systematically lower than that of dynamical modelings. One possibility for such a discrepancy is that, as we suggest in this work, there exist outflows in accretion flows. Our results indicate that, for most sources, current radio observations cannot rule out the possibility that IMBHs may exist in GCs. In addition, we adopt an \dot{M}-L_{R} relation to revisit this issue, which confirms the results obtained by the Fundamental Plane relation.

18 pages, 2 figures, accepted for publication in ApJ

References in corpus (13)

• Gemini and Hubble Space Telescope Evidence for an Intermediate Mass Black Hole in omega Centauri
• A radio-emitting outflow in the quiescent state of A0620-00: implications for modelling low-luminosity black hole binaries
• HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae
• Jet-dominated advective systems: radio and X-ray luminosity dependence on the accretion rate
• Revisiting the radio/X-ray flux correlation in the black hole V404 Cyg: from outburst to quiescence
• Revisiting the "Fundamental Plane" of Black Hole Activity at Extremely Low Luminosities
• The not-so-massive black hole in the microquasar GRS1915+105
• Density and kinematic cusps in M54 at the heart of the Sagittarius dwarf galaxy: evidence for a 10^4 M_sun Black Hole?
• On the origin of X-ray emission in some FR Is: ADAF or jet?
• The black hole fundamental plane from a uniform sample of radio and X-ray emitting broad line AGNs
• Radio observations of NGC 2808 and other globular clusters: constraints on intermediate mass black holes
• VLA Limits for Intermediate Mass Black Holes in Three Globular Clusters
• Upper limits on the central black hole masses of 47Tuc and NGC6397

Cited by in corpus (10)

• Evidence for an intermediate-mass black hole in the globular cluster NGC 6624
• Observational Evidence for a Dark Side to NGC5128's Globular Cluster System
• MOCCA-SURVEY Database I: Is NGC 6535 a Dark Star Cluster Harboring an IMBH?
• Binary black hole growth by gas accretion in stellar clusters
• A Stacked Search for Intermediate-Mass Black Holes in 337 Extragalactic Star Clusters
• The Lost Dwarfs of Centaurus A and the Formation of its Dark Globular Clusters
• A Chandra Survey of Milky Way Globular Clusters. III. Searching for X-ray Signature of Intermediate-mass Black Holes
• Probing Dark Contents in Globular Clusters With Timing Effects of Pulsar Acceleration
• Correlations of Disk and Jet Emission Deviating from the Fundamental Plane
• Prospects for Revealing Intermediate-Mass Black Holes in NGC 1399 using SKA