A Search for Wandering Black Holes in the Milky Way with Gaia and DECaLS

Abstract

We present a search for "hyper-compact" star clusters in the Milky Way using a combination of Gaia and the Dark Energy Camera Legacy Survey (DECaLS). Such putative clusters, with sizes of ~1 pc and containing 500-5000 stars, are expected to remain bound to intermediate-mass black holes (Mbh~10^3-10^5 M-sun) that may be accreted into the Milky Way halo within dwarf satellites. Using the semi-analytic model SatGen we find an expected ~100 wandering intermediate-mass black holes with if every infalling satellite hosts a black hole. We do not find any such clusters in our search. Our upper limits rule out 100% occupancy, but do not put stringent constraints on the occupation fraction. Of course, we need stronger constraints on the properties of the putative star clusters, including their assumed sizes as well as the fraction of stars that would be compact remnants.

arXiv comment20 pages, 8 figures, under review at ApJ

References in corpus (96)

• Gaia Data Release 2. Summary of the contents and survey properties
• On the variation of the Initial Mass Function
• The Gaia mission
• Modules for Experiments in Stellar Astrophysics (MESA)
• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• The observed properties of dwarf galaxies in and around the Local Group
• Overview of the DESI Legacy Imaging Surveys
• Local Supermassive Black Holes, Relics of Active Galactic Nuclei and the X-ray Background
• Revisiting the Scaling Relations of Black Hole Masses and Host Galaxy Properties
• The Dark Energy Camera
• The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation
• Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass in the Local Universe
• Formation of Supermassive Black Holes
• Intermediate-Mass Black Holes
• The runaway growth of intermediate-mass black holes in dense star clusters
• The Assembly of the First Massive Black Holes
• Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data
• Beasts of the Southern Wild: Discovery of nine Ultra Faint satellites in the vicinity of the Magellanic Clouds
• Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey
• Large Merger Recoils and Spin Flips From Generic Black-Hole Binaries
• An Intermediate-mass Black Hole of Over 500 Solar Masses in the Galaxy ESO 243-49
• A New Milky Way Dwarf Galaxy in Ursa Major
• Production of Intermediate-Mass Black Holes in Globular Clusters
• A Faint New Milky Way Satellite in Bootes
• Origin of the system of globular clusters in the Milky Way
• Nuclear Star Clusters
• Sagittarius: The Nearest Dwarf Galaxy
• The Luminosity Function of the Milky Way Satellites
• Stellar Streams Discovered in the Dark Energy Survey
• A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
• An Intermediate-Mass Black Hole in the Globular Cluster G1: Improved Significance from New Keck and Hubble Space Telescope Observations
• M33: A Galaxy with No Supermassive Black Hole
• The Galaxy-Halo Connection Over The Last 13.3 Gyrs
• Super-Eddington Accretion Disks around Supermassive black Holes
• A New Sample of (Wandering) Massive Black Holes in Dwarf Galaxies from High Resolution Radio Observations
• N-body modeling of globular clusters: Masses, mass-to-light ratios and intermediate-mass black holes
• The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2
• The Observational Signatures of Supermassive Black Hole Seeds
• Improved Dynamical Constraints on the Masses of the Central Black Holes in Nearby Low-mass Early-type Galactic Nuclei And the First Black Hole Determination for NGC 205
• Radio Detections During Two State Transitions of the Intermediate Mass Black Hole HLX-1
• A luminous X-ray outburst from an intermediate-mass black hole in an off-centre star cluster
• Multimessenger Signatures of Massive Black Holes in Dwarf Galaxies
• The Next Generation Virgo Cluster Survey. XXIII. Fundamentals of nuclear star clusters over seven decades in galaxy mass
• X-ray constraints on the local supermassive black hole occupation fraction
• Nearby Early-Type Galactic Nuclei at High Resolution: Dynamical Black Hole and Nuclear Star Cluster Mass Measurements
• VLT Kinematics for omega Centauri: Further Support for a Central Black Hole
• Discovery of two neighboring satellites in the Carina constellation with MagLiteS
• Dynamical evolution of intermediate mass black holes and their observable signatures in the nearby Universe
• Wandering Black Holes in Bright Disk Galaxy Halos
• Gravitational Waves and Intermediate-mass Black Hole Retention in Globular Clusters
• Massive black holes lurking in Milky Way satellites
• The Cool Accretion Disk in ESO 243-49 HLX-1: Further Evidence of an Intermediate Mass Black Hole
• The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters
• Contribution of stripped nuclear clusters to globular cluster and ultra-compact dwarf galaxy populations
• Hypercompact Stellar Systems Around Recoiling Supermassive Black Holes
• Megamaser Disks Reveal a Broad Distribution of Black Hole Mass in Spiral Galaxies
• LISA extreme-mass-ratio inspiral events as probes of the black hole mass function
• A search for optical AGN variability in 35,000 low-mass galaxies with the Palomar Transient Factory
• The Euclid mission design
• Detection of Supermassive Black Holes in Two Virgo Ultracompact Dwarf Galaxies
• Density and kinematic cusps in M54 at the heart of the Sagittarius dwarf galaxy: evidence for a 10^4 M_sun Black Hole?
• Wandering Supermassive Black Holes in Milky Way Mass Halos
• The effect of stellar-mass black holes on the central kinematics of omega Cen: a cautionary tale for IMBH interpretations
• SatGen: a semi-analytical satellite galaxy generator -- I. The model and its application to Local-Group satellite statistics
• Research Update on Extreme-Mass-Ratio Inspirals
• The Accreted Nuclear Clusters of the Milky Way
• Are nuclear star clusters the precursors of massive black holes?
• No evidence for intermediate-mass black holes in the globular clusters $\omega$ Cen and NGC 6624
• Origins and Demographics of Wandering Black Holes
• The Black Hole in the Most Massive Ultracompact Dwarf Galaxy M59-UCD3
• The origin of variability of the intermediate-mass black-hole ULX system HLX-1 in ESO 243-49
• The Close Stellar Companions to Intermediate Mass Black Holes
• A supra-massive population of stellar-mass black holes in the globular cluster Palomar 5
• Hunting Faint Dwarf Galaxies in the Field Using Integrated Light Surveys
• Star Clusters Around Recoiled Black Holes in the Milky Way Halo
• Exploring the local black hole mass function below $10^6$ solar masses
• Chandra Survey of Nearby Galaxies: A Significant Population of Candidate Central Black Holes in Late-type Galaxies
• Constraining ultra-compact dwarf galaxy formation with galaxy clusters in the local universe
• Upper Limits on Central Black Hole Masses of Globular Clusters from Radio Emission and a Possible Black Hole Detection in the Ursa Minor Dwarf Galaxy
• The impact of stripped Nuclei on the Super-Massive Black Hole number density in the local Universe
• Measuring distances to low-luminosity galaxies using surface brightness fluctuations
• A Population of Relic Intermediate-Mass Black Holes in the Halo of the Milky Way
• The MBHBM* Project -- I: Measurement of the Central Black Hole Mass in Dwarf Galaxy NGC 3504 Using Molecular Gas Kinematics
• Combined Analysis of Hubble and VLT Photometry of the Intermediate Mass Black Hole ESO 243-49 HLX-1
• High-velocity stars in the cores of globular clusters: The illustrative case of NGC 2808
• Outbursts of the intermediate-mass black hole HLX-1: a wind instability scenario
• Hunting for wandering massive black holes
• Recoiled star clusters in the Milky Way halo: N-body simulations and a candidate search through SDSS
• A Very Large Array Search for Intermediate-Mass Black Holes in Globular Clusters in M81
• Hypercompact stellar clusters: morphological renditions and spectro-photometric models

Cited by in corpus (1)

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