Exploring dark matter spike distribution around the Galactic centre with stellar orbits

Abstract

Precise measurements of the stellar orbits around Sagittarius A* have established the existence of a supermassive black hole (SMBH) at the Galactic centre (GC). Due to the interplay between the SMBH and dark matter (DM), the DM density profile in the innermost region of the Galaxy, which is crucial for the DM indirect detection, is still an open question. Among the most popular models in the literature, the theoretical spike profile proposed by Gondolo and Silk (1999; GS hereafter) is well adopted. In this work, we investigate the DM spike profile using updated data from the Keck and VLT telescopes considering that the presence of such an extended mass component may affect the orbits of the S-stars in the Galactic center. We examine the radius and slope of the generalized NFW spike profile, analyze the Einasto spike, and discuss the influence of DM annihilation on the results. Our findings indicate that an initial slope of $\gamma \gtrsim 0.92$ for the generalized NFW spike profile is ruled out at a 95% confidence level. Additionally, the spike radius $R_{\mathrm{sp}}$ larger than 21.5 pc is rejected at 95% probability for the Einasto spike with $\alpha =0.17$, which also contradicts the GS spike model. The constraints with the VLT/GRAVITY upper limits are also projected. Although the GS NFW spike is well constrained by the Keck and VLT observation of S2, an NFW spike with a weak annihilation cusp may still be viable, as long as the DM annihilation cross section satisfies $⟨\sigma v⟩\gtrsim 7.7\times 10^{-27}\mathrm{c}{\mathrm{m}}^3{\mathrm{s}}^{-1}(m_{\mathrm{DM}}/100\mathrm{GeV})$ at 95% level.

arXiv comment12 pages, 10 figures and 1 table. Accepted for publication in MNRAS

References in corpus (94)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• emcee: The MCMC Hammer
• A Universal Density Profile from Hierarchical Clustering
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Particle Dark Matter: Evidence, Candidates and Constraints
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• Cold and Fuzzy Dark Matter
• Dark Matter Candidates from Particle Physics and Methods of Detection
• A History of Dark Matter
• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• The mass distribution and gravitational potential of the Milky Way
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• Dark matter annihilation at the galactic center
• High Proper Motion Stars in the Vicinity of Sgr A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy
• The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy's Central Black Hole: A Paradox of Youth
• First Light for GRAVITY: Phase Referencing Optical Interferometry for the Very Large Telescope Interferometer
• WIMP dark matter candidates and searches - current status and future prospects
• Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole
• Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
• An Update on Monitoring Stellar Orbits in the Galactic Center
• The orbit of the star S2 around SgrA* from VLT and Keck data
• Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*
• The Milky Way total mass profile as inferred from Gaia DR2
• A Dark-Matter Spike at the Galactic Center?
• Data analysis recipes: Using Markov Chain Monte Carlo
• Updated Search for Spectral Lines from Galactic Dark Matter Interactions with Pass 8 Data from the Fermi Large Area Telescope
• Fermi LAT Search for Internal Bremsstrahlung Signatures from Dark Matter Annihilation
• The mass distribution in the Galactic Centre from interferometric astrometry of multiple stellar orbits
• Testing General Relativity with stellar orbits around the supermassive black hole in our Galactic center
• Universal structure of dark matter haloes over a mass range of 20 orders of magnitude
• Current status of direct dark matter detection experiments
• Dark matter distributions around massive black holes: A general relativistic analysis
• Chaotic Loss Cones, Black Hole Fueling and the M-Sigma Relation
• Dark Matter Spikes and Annihilation Radiation from the Galactic Center
• Dark Matter Profile in the Galactic Center
• Improved GRAVITY astrometric accuracy from modeling of optical aberrations
• Rotation Curve and Mass Distribution in the Galactic Center --- From Black Hole to Entire Galaxy ---
• Dark matter local density determination: recent observations and future prospects
• GeV excess in the Milky Way: The Role of Diffuse Galactic gamma ray Emission template
• Evolution of the Dark Matter Distribution at the Galactic Center
• A new probe of dark matter properties: gravitational waves from an intermediate mass black hole embedded in a dark matter mini-spike
• Dark Matter Searches with Astroparticle Data
• Stellar Dynamics at the Galactic Center with an Extremely Large Telescope
• Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
• Collisional Dark Matter and the Origin of Massive Black Holes
• The characteristics of the Galactic center excess measured with 11 years of Fermi-LAT data
• Galactic Center Gamma-Ray Excess from Dark Matter Annihilation: Is There A Black Hole Spike?
• Modelling the Sgr A* Black Hole Immersed in a Dark Matter Spike
• The Milky Way's nuclear star cluster: Old, metal-rich, and cuspy
• Dark matter spikes in the vicinity of Kerr black holes
• Annihilation Radiation from a Dark Matter Spike at the Galactic Centre
• Dynamical constraints on a dark matter spike at the Galactic Centre from stellar orbits
• Looking for ultralight dark matter near supermassive black holes
• S62 and S4711: Indications of a population of faint fast moving stars inside the S2 orbit -- S4711 on a 7.6 year orbit around Sgr~A*
• The Return of the Templates: Revisiting the Galactic Center Excess with Multi-Messenger Observations
• Hinting a dark matter nature of Sgr A* via the S-stars
• Scalar field effects on the orbit of S2 star
• Inert Higgs Dark Matter for CDF-II W-boson Mass and Detection Prospects
• Investigating the Binarity of S0-2: Implications for its Origins and Robustness as a Probe of the Laws of Gravity around a Supermassive Black Hole
• Dark matter annihilation near a black hole: plateau vs. weak cusp
• Either neutralino dark matter or cuspy dark halos
• S62 on a 9.9 yr Orbit around SgrA*
• On Testing the Kerr Metric of the Massive Black Hole in the Galactic Center via Stellar Orbital Motion: Full General Relativistic Treatment
• Uncertainties in the Galactic dark matter distribution: an update
• Weak annihilation cusp inside the dark matter spike about a black hole
• Relativistic formulation of coordinate light time, Doppler and astrometric observables up to the second post-Minkowskian order
• Spherical galaxy models with power law logarithmic slope
• Probing Dark Matter Spikes via Gravitational Waves of Extreme Mass Ratio Inspirals
• The dark mass signature in the orbit of S2
• Search for gamma-ray spectral lines with the DArk Matter Particle Explorer
• Milky Way total Mass derived by Rotation Curve and Globular Cluster kinematics from Gaia EDR3
• Dark energy interactions near the galactic centre
• The Star Formation History of the Milky Way's Nuclear Star Cluster
• Observation of S4716 -- a Star with a 4 yr Orbit around Sgr A*
• Explaining the GeV antiproton/$\gamma -$ray excesses and W-boson mass anomaly in an inert two Higgs doublet model
• Unique probe of dark matter in the core of M87 with the Event Horizon Telescope
• Detection of faint stars near SgrA* with GRAVITY
• Constraints on self-dual black hole in loop quantum gravity with S0-2 star in the Galactic Center
• Where intermediate-mass black holes could hide in the Galactic Centre: A full parameter study with the S2 orbit
• The Galactic Center as a laboratory for theories of gravity and dark matter
• Probing a dark matter density spike at the Galactic Center
• The Effect of Stars on the Dark Matter Spike Around a Black Hole: A Tale of Two Treatments
• Search for Gamma-ray Spectral Lines from Dark Matter Annihilation up to 100 TeV towards the Galactic Center with MAGIC
• The Einasto model for dark matter haloes
• Constraining ultralight bosonic dark matter with Keck observations of S2's orbit and kinematics
• Testing Horndeski gravity with S2 star orbit
• Constraints on dark matter annihilation from the Event Horizon Telescope Observations of M87${}^{\star }$
• Search for gamma-ray line signals around the black hole at the galactic center with DAMPE observation
• Unrecognized Astrometric Confusion in the Galactic Centre

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• Multi-TeV dark matter density in the inner Milky Way halo: spectral and dynamical constraints
• Searching Accretion-Enhanced Dark Matter Annihilation Signals in the Galactic Centre
• Distinctive GWBs from eccentric inspiraling SMBH binaries with a DM spike
• Compact Binary Merger Rate with Modified Gravity in Dark-Matter Spikes
• Universal Density and Velocity Distributions of Dark Matter around Massive Black Holes
• Dark Matter Spike surrounding Supermassive Black Holes Binary and the Nanohertz Stochastic Gravitational Wave Background
• Prospects for probing small-scale dark matter models with pulsars around Sagittarius A*
• Dark Matter reconstruction from stellar orbits in the Galactic Centre
• Probing a Lorentz-violating parameter from orbital precession of the S2 star around the galactic centre supermassive black hole
• Microlensing of dark matter models in the Milky Way
• Dark Matter spikes around Sgr A* in $\gamma$-rays
• Microlensing Black Hole Shadows
• Detecting Lorentz-violation induced by a tensor field with S-star's motion around Sgr A*
• Fermionic Dark Matter spikes: origin and growth of Black Hole seeds