Where are Gaia's small black holes?

Abstract

Gaia has recently revealed a population of over 20 compact objects in wide astrometric binaries, while LIGO-Virgo-KAGRA (LVK) have observed around 100 compact object binaries as gravitational-wave (GW) mergers. Despite belonging to different systems, the compact objects discovered by both Gaia and the LVK follow a multimodal mass distribution, with a global maximum at neutron star (NS) masses ($\sim 1$-$2M_{\odot }$) and a secondary local maximum at black hole (BH) masses $\sim 10M_{\odot }$. However, the relative dearth of objects, or ``mass gap," between these modes is more pronounced among the wide binaries observed by Gaia compared to the GW population, with $9_{-6}^{+10}\%$ of GW component masses falling between $2.5$--$5M_{\odot }$ compared to $\lesssim 5\%$ of Gaia compact objects. We explore whether this discrepancy can be explained by the natal kicks received by low-mass BHs. GW progenitor binaries may be more likely to survive natal kicks, because the newborn BH has a more massive companion and/or is in a tighter binary than Gaia progenitor binaries. We compare the survival probabilities of Gaia and GW progenitor binaries as a function of natal kick strength and pre-supernova binary parameters, and map out the parameter space and kick strength required to disrupt the progenitor binaries leading to low-mass BHs in Gaia systems more frequently than those in GW systems.

20 pages, 4 figures. Updated to match accepted version. Invited contribution for Springer Nature's Astronomy Prize Awardees Collection

References in corpus (82)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• The Gaia mission
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Gaia Data Release 3: Summary of the content and survey properties
• GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
• Advanced LIGO
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Evolution of binary stars and the effect of tides on binary populations
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Compact Remnant Mass Function: Dependence on the Explosion Mechanism and Metallicity
• The Black Hole Mass Distribution in the Galaxy
• Theoretical Black Hole Mass Distributions
• The Effects of Binary Evolution on the Dynamics of Core Collapse and Neutron-Star Kicks
• The Mass Distribution of Stellar-Mass Black Holes
• New binary black hole mergers in the second observing run of Advanced LIGO and Advanced Virgo
• Illuminating Black Hole Binary Formation Channels with Spins in Advanced LIGO
• The Mass Distribution of Stellar Black Holes
• Mass Measurements of Black Holes in X-Ray Transients: Is There a Mass Gap?
• Massive runaways and walkaway stars
• Spin-Orbit Misalignment in Close Binaries with Two Compact Objects
• Mass Measurements of Stellar and Intermediate Mass Black-Holes
• The Masses and Spins of Neutron Stars and Stellar-Mass Black Holes
• Orbital Characteristics of Binary Systems after Asymmetric Supernova Explosions
• A Sun-like star orbiting a black hole
• Observation of Gravitational Waves from the Coalescence of a $2.5\text{-}4.5M_{\odot }$ Compact Object and a Neutron Star
• 3-OGC: Catalog of gravitational waves from compact-binary mergers
• Natal Kicks of Stellar-Mass Black Holes by Asymmetric Mass Ejection in Fallback Supernovae
• A red giant orbiting a black hole
• An isolated mass gap black hole or neutron star detected with astrometric microlensing
• Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry
• Simple recipes for compact remnant masses and natal kicks
• Neutron Star Kicks in Isolated and Binary Pulsars: Observational Constraints and Implications for Kick Mechanisms
• Orbital properties of binary post-AGB stars
• A non-interacting Galactic black hole candidate in a binary system with a main-sequence star
• An X-ray quiet black hole born with a negligible kick in a massive binary within the Large Magellanic Cloud
• Model-independent inference on compact-binary observations
• The Most Massive Binary Black Hole Detections and the Identification of Population Outliers
• The Emergence of Structure in the Binary Black Hole Mass Distribution
• Cover Your Basis: Comprehensive Data-Driven Characterization of the Binary Black Hole Population
• Multi-D Simulations of Ultra-Stripped Supernovae to Shock Breakout
• No peaks without valleys: The stable mass transfer channel for gravitational-wave sources in light of the neutron star-black hole mass gap
• Picky Partners: The Pairing of Component Masses in Binary Black Hole Mergers
• Inferences about supernova physics from gravitational-wave measurements: GW151226 spin misalignment as an indicator of strong black-hole natal kicks
• The implications of high BH spins on the origin of BH-BH mergers
• Apples and Oranges: Comparing black holes in X-ray binaries and gravitational-wave sources
• Does Matter Matter? Using the mass distribution to distinguish neutron stars and black holes
• A Parameter-Free Tour of the Binary Black Hole Population
• Suspicious Siblings: The Distribution of Mass and Spin Across Component Black Holes in Isolated Binary Evolution
• State of the field: Binary black hole natal kicks and prospects for isolated field formation after GWTC-2
• Gaia May Detect Hundreds of Well-characterised Stellar Black Holes
• PopSyCLE: A New Population Synthesis Code for Compact Object Microlensing Events
• Binary-Stripped Stars as Core-Collapse Supernovae Progenitors
• Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods
• Non-parametric inference of the population of compact binaries from gravitational wave observations using binned Gaussian processes
• The mass-ratio and eccentricity distributions of barium and S stars, and red giants in open clusters
• Signatures of mass ratio reversal in gravitational waves from merging binary black holes
• Population properties and multimessenger prospects of neutron star-black hole mergers following GWTC-3
• Interplay Between Neutrino Kicks and Hydrodynamic Kicks of Neutron Stars and Black Holes
• Long-term Evolution of Binary Orbits Induced by Circumbinary Disks
• A population of neutron star candidates in wide orbits from Gaia astrometry
• Explaining the differences in massive star models from various simulations
• Evidence for mass-dependent peculiar velocities in compact object binaries: Towards better constraints on natal kicks
• A potential mass-gap black hole in a wide binary with a circular orbit
• Inferring the neutron star maximum mass and lower mass gap in neutron star-black hole systems with spin
• Dynamical formation of Gaia BH3 in the progenitor globular cluster of the ED-2 stream
• Do high-spin high-mass X-ray binaries contribute to the population of merging binary black holes?
• The 33 M${}_{\odot }$ black hole Gaia BH3 is part of the disrupted ED-2 star cluster
• The Missing Link Between Black Holes in High-Mass X-ray Binaries and Gravitational-Wave Sources: Observational Selection Effects
• The role of stellar expansion on the formation of gravitational wave sources
• The Formation of Black Holes in Non-interacting, Isolated Binaries. Gaia Black Holes as Calibrators of Stellar Winds From Massive Stars
• Detection of single-degenerate massive binaries with Gaia: The impact of blue supergiants, triples, mass precision, and high-precision parallax requirements
• Compact Binary Formation in Open Star Clusters II: Difficulty of Gaia NS formation in low-mass star clusters
• Evidence of polar and ultralow supernova kicks from the orbits of Be X-ray binaries
• A Theory for Neutron Star and Black Hole Kicks and Induced Spins
• Revising the Spin and Kick Connection in Isolated Binary Black Holes
• Surprisingly Similar: The Mass Function of Gaia Neutron Stars and First-Born Double Neutron Stars
• A Fast, Analytic Empirical Model of the Gaia Data Release 3 Astrometric Orbit Catalog Selection Function
• Probing Binary Architectures of Lithium-Rich Giants in GALAH with COSMIC and Stellar Models
• The formation of Gaia BH3
• A Be star-black hole binary with a wide orbit from LAMOST time-domain survey