High velocity stars from close interaction of a globular cluster and a super massive black hole

Abstract

Observations show the presence, in the halo of our Galaxy, of stars moving at velocities so high to require an acceleration mechanism involving the presence of a massive central black hole. Thus, in the frame of a galaxy hosting a supermassive black hole ($10^8$ $M_{\odot }$) we investigated a mechanism for the production of high velocity stars, which was suggested by the results of N-body simulations of the close interaction between a massive, orbitally decayed, globular cluster and the super massive black hole. The high velocity acquired by some stars of the cluster comes from the transfer of gravitational binding energy into kinetic energy of the escaping star originally orbiting around the cluster. After the close interaction with the massive black hole, stars could reach a velocity sufficient to travel in the halo and even overcome the galactic gravitational well, while some of them are just stripped from the globular cluster and start orbiting on precessing loops around the galactic centre.

15 pages, 9 figures, 2 Tables, accepted for publication in MNRAS

References in corpus (22)

• Interaction of massive black hole binaries with their stellar environment: I. Ejection of hypervelocity stars
• Implementing Few-Body Algorithmic Regularization with Post-Newtonian Terms
• Hypervelocity Stars: Predicting the Spectrum of Ejection Velocities
• Algorithmic regularization with velocity-dependent forces
• Self-consistent simulations of Nuclear Cluster formation through Globular Cluster orbital decay and merging
• Runaway and hypervelocity stars in the Galactic halo: Binary rejuvenation and triple disruption
• Hypervelocity stars and the environment of Sgr A*
• Production of Hypervelocity Stars through Encounters with Stellar-Mass Black Holes in the Galactic Centre
• Kinematics of hypervelocity stars in the triaxial halo of the Milky Way
• A Galactic Center Origin for HE 0437-5439, the Hypervelocity Star near the Large Magellanic Cloud
• Hypervelocity Stars from the Andromeda Galaxy
• The Nearest High-Velocity Stars Revealed by LAMOST Data Release 1
• Low Metallicity Indicates that the Hypervelocity Star HE 0437-5439 was Ejected from the LMC
• A high-velocity bulge RR Lyrae variable on a halo-like orbit
• 'Slow' and Fast Rotators among Hypervelocity Stars
• HD271791: dynamical versus binary-supernova ejection scenario
• Dynamics of Kicked and Accelerated Massive Black Holes in Galaxies
• Hypervelocity A & B Stars should be slow rotators
• Red Runaways: Hypervelocity Stars, Hills Ejecta and Other Outliers in the F-M Star Regime
• Analytical solutions for weak black hole kicks
• 19 low mass hyper-velocity star candidates from the first data release of LAMOST survey
• The interaction between supermassive black holes and globular clusters

Cited by in corpus (47)

• The mass of our Milky Way
• Gravitational Waves and Intermediate-mass Black Hole Retention in Globular Clusters
• Gravitational wave sources from inspiralling globular clusters in the Galactic Centre and similar environments
• Gaia DR2 in 6D: Searching for the fastest stars in the Galaxy
• The MEGaN project II. Gravitational waves from intermediate mass- and binary black holes around a supermassive black hole
• High velocity stars from the interaction of a globular cluster and a massive black hole binary
• Constraining Milky Way mass with Hypervelocity Stars
• Predicting the hypervelocity star population in Gaia
• 591 high velocity stars in the Galactic halo selected from LAMOST DR7 and Gaia DR2
• Hypervelocity stars from young stellar clusters in the Galactic Centre
• Steeper stellar cusps in galactic centers from binary disruption
• Nearby high-speed stars in Gaia DR2
• Core-Collapse Supernovae in Binaries as the Origin of Galactic Hyper-Runaway Stars
• Gaia DR3 in 6D: The search for fast hypervelocity stars and constraints on the Galactic Centre environment
• Gaia EDR3 in 6D: Searching for unbound stars in the Galaxy
• Tidal disruption events, main-sequence extreme-mass ratio inspirals and binary star disruptions in galactic nuclei
• New nearby hypervelocity stars and their spatial distribution from Gaia DR2
• Supermassive black holes coalescence mediated by massive perturbers: implications for gravitational waves emission and nuclear cluster formation
• Hypervelocity Stars from a Supermassive Black Hole-Intermediate-mass Black Hole binary
• The secular tidal disruption of stars by low-mass Super Massive Black Holes secondaries in galactic nuclei
• Hypervelocity stars from star clusters hosting Intermediate-Mass Black Holes
• The dearth of nuclear star clusters in bright galaxies
• The MEGaN project I. Missing formation of massive nuclear clusters and tidal disruption events by star clusters - massive black hole interactions
• Impact of the Galactic Disk and Large Magellanic Cloud on the Trajectories of Hypervelocity Stars Ejected from the Galactic Center
• Milky Way archaeology using RR Lyrae and type II Cepheids II. High velocity RR Lyrae stars, and mass of the Milky Way
• Constraints on the Galactic Centre environment from Gaia hypervelocity stars
• Tidal breakup of triple stars in the Galactic Centre
• Red Supergiant Candidates for Multimessenger Monitoring of the Next Galactic Supernova
• Parameters of Three Selected Model Galactic Potentials Based on the Velocities of Objects at Distances up to 200 kpc
• Relaxation near supermassive black holes driven by nuclear spiral arms: anisotropic hypervelocity stars, S-stars and tidal disruption events
• The origin of high velocity stars from Gaia and LAMOST
• Constraints on the Galactic Centre environment from \textit{Gaia} hypervelocity stars III: Insights on a possible companion to Sgr A*
• 60 candidate high-velocity stars originating from the Sagittarius dwarf spheroidal galaxy in Gaia EDR3
• Close Encounters of Tight Binary Stars with Stellar-mass Black Holes
• Constraints on the Galactic Centre environment from Gaia hypervelocity stars II: The evolved population
• The fate of close encounters between binary stars and binary supermassive black holes
• Intermediate-Mass Black Holes in binary-rich star clusters
• Formation of runaway stars in a star-cluster potential
• The luminosity function of quasars by the Principle of Maximum Entropy
• High Velocity Stars in SDSS/APOGEE DR17
• Transits Probabilities Around Hypervelocity and Runaway Stars
• A Runaway Yellow Supergiant Star in the Small Magellanic Cloud
• Candidate Hypervelocity Red Clump Stars in the Galactic Bulge Found Using the VVV and Gaia Surveys
• Tidal breakup of quadruple stars in the Galactic Centre
• Three New Late-type Hypervelocity Star Candidates from Gaia DR2 with Refined Selection Criteria
• Searching for new Hypervelocity Stars with Gaia DR3 and VLT/FORS2 Spectroscopy
• The Fate of Binary Stars Hosting Planets upon Interaction with Sgr A* Black hole