Stellar Collisions in Galactic Nuclei: Impact on Destructive Events Near a Supermassive Black Hole

Abstract

Centers of galaxies host both a supermassive black hole and a dense stellar cluster. Such an environment should lead to stellar collisions, possibly at very high velocities so that the total energy involved is of the same order as supernovae explosions. We present a simplified numerical analysis of the destructive stellar collision rate in a cluster similar to that of the Milky Way. The analysis includes an effective average two-body relaxation Monte-Carlo scheme and general relativistic effects, as used by Sari and Fragione (2019), to which we added explicit tracking of local probabilities for stellar collisions. We also consider stars which are injected into the stellar cluster after being disrupted from a binary system by the supermassive black hole. Such stars are captured in the vicinity of the black hole and enhance the expected collision rate. In our results we examine the rate and energetic distribution function of high velocity stellar collisions, and compare them self-consistently with the other destructive processes which occur in the galactic center, namely tidal disruptions and extreme mass ratio inspirals.

arXiv comment18 pages, 10 figures

References in corpus (39)

• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• Observational Evidence of AGN Feedback
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Stellar Multiplicity
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• The M(BH)-Sigma Relation for Supermassive Black Holes
• Tidal Disruption Events
• Resonant Relaxation in Stellar Systems
• Resonant relaxation near a massive black hole: the stellar distribution and gravitational wave sources
• The orbital statistics of stellar inspiral and relaxation near a massive black hole: characterizing gravitational wave sources
• Stellar Dynamics and Stellar Phenomena Near A Massive Black Hole
• Hypervelocity Stars: Predicting the Spectrum of Ejection Velocities
• The properties of dynamically ejected runaway and hyper-runaway stars
• Resonant relaxation and the warp of the stellar disc in the Galactic centre
• Gravitational Waves and Intermediate-mass Black Hole Retention in Globular Clusters
• Interacting Stellar EMRIs as Sources of Quasi-Periodic Eruptions in Galactic Nuclei
• Hyper Velocity Stars and the Restricted Parabolic 3-body Problem
• Steady state relativistic stellar dynamics around a massive black hole
• Blue Stragglers as Stellar Collision Products: the Angular Momentum Question
• A comprehensive set of simulations of high-velocity collisions between main sequence stars
• A numerical study of vector resonant relaxation
• Binary dynamics near a massive black hole
• Tidal Disruption Events and Gravitational Waves from Intermediate-mass Black Holes in Evolving Globular Clusters Across Space and Time
• Unstable Mass Transfer from a Main-Sequence Star to a Supermassive Black Hole and Quasi-Periodic Eruptions
• Collisions and close encounters involving massive main-sequence stars
• The Formation of Intermediate Mass Black Holes in Galactic Nuclei
• Analytic study of mass segregation around a massive black hole
• Double tidal disruptions in galactic nuclei
• The Velocity Distribution of Hypervelocity Stars
• Binary Disruption by Massive Black Holes: Hypervelocity Stars, S Stars, and Tidal Disruption Events
• Steeper stellar cusps in galactic centers from binary disruption
• Tidal disruption events, main-sequence extreme-mass ratio inspirals and binary star disruptions in galactic nuclei
• Stellar Distributions Around a Supermassive Black Hole: Strong Segregation Regime Revisited
• Periodic accretion-powered flares from colliding EMRIs as TDE Imposters
• Massive binary star mergers in galactic nuclei: implications for blue stragglers, binary S-stars and gravitational waves
• Transient stellar collisions as multimessenger probes: Non-thermal-, gravitational wave emission and the cosmic ladder argument
• Secular Dynamics around a Supermassive Black Hole via Multipole Expansion
• Accelerating NBODY6 with a GPU-Enabled Particle-Particle Particle-Tree Scheme

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• Dynamics around supermassive black holes: Extreme mass-ratio inspirals as gravitational-wave sources
• Segregation and Collisions in Galactic Nuclei: Rates of Destructive Events Near a Supermassive Black Hole
• The Primary Flare Following a Stellar Collision in a Galactic Nucleus
• Predicting stellar collision outcomes of main sequence stars
• Tidal phenomena in the Galactic Center: The curious case of X7
• The unreasonable effectiveness of the $n\Sigma v$ approximation
• Light curves and spectra for stellar collisions between main-sequence stars in galactic nuclei