Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center

Abstract

The existence of dark matter (DM) at scales of few pc down to $\simeq 10^{-5}$ pc around the centers of galaxies and in particular in the Galactic Center region has been considered in the literature. Under the assumption that such a DM clump, principally constituted by non-baryonic matter (like WIMPs) does exist at the center of our galaxy, the study of the $\gamma$-ray emission from the Galactic Center region allows us to constrain both the mass and the size of this DM sphere. Further constraints on the DM distribution parameters may be derived by observations of bright infrared stars around the Galactic Center. Hall and Gondolo \cite{hallgondolo} used estimates of the enclosed mass obtained in various ways and tabulated by Ghez et al. \cite{Ghez_2003,Ghez_2005}. Moreover, if a DM cusp does exist around the Galactic Center it could modify the trajectories of stars moving around it in a sensible way depending on the DM mass distribution. Here, we discuss the constraints that can be obtained with the orbit analysis of stars (as S2 and S16) moving inside the DM concentration with present and next generations of large telescopes. In particular, consideration of the S2 star apoastron shift may allow improving limits on the DM mass and size.

in press on Phys. Rev. D

References in corpus (24)

• Particle Dark Matter: Evidence, Candidates and Constraints
• Stellar Orbits Around the Galactic Center Black Hole
• Dark matter annihilation at the galactic center
• The Stellar Cusp Around the Supermassive Black Hole in the Galactic Center
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• A Dark-Matter Spike at the Galactic Center?
• A "Baedecker" for the Dark Matter Annihilation Signal
• Dark matter annihilation in the halo of the Milky Way
• Dark Matter Profile in the Galactic Center
• Time-Dependent Models for Dark Matter at the Galactic Center
• Dark Matter Dynamics and Indirect Detection
• Stellar Dynamics at the Galactic Center with an Extremely Large Telescope
• High Energy Gamma--Radiation from the Galactic Center due to Neutralino Annihilation
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter
• Astrophysical inputs on the SUSY dark matter annihilation detectability
• Gamma Rays from Heavy Neutralino Dark Matter
• The Detectability of Neutralino Clumps via Atmospheric Cherenkov Telescopes
• Collisionally Regenerated Dark Matter Structures in Galactic Nuclei
• TeV $\gamma$-radiation from Dark Matter annihilation in the Galactic center
• Full Three Dimensional Orbits For Multiple Stars on Close Approaches to the Central Supermassive Black Hole
• Sgr A${}^{\ast }$: a laboratory to measure the central black hole and cluster parameters
• Neutrinos from Dark Matter annihilations at the Galactic Centre
• Stellar Orbit Constraints on Neutralino Annihilation at the Galactic Center
• Gamma Radiation by Neutralino Stars

Cited by in corpus (42)

• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• Dark matter distributions around massive black holes: A general relativistic analysis
• Testing Properties of the Galactic Center Black Hole Using Stellar Orbits
• Constraints on a charge in the Reissner--Nordström metric for the black hole at the Galactic Center
• Dynamical constraints on a dark matter spike at the Galactic Centre from stellar orbits
• Constraining the range of Yukawa gravity interaction from S2 star orbits
• Constraints on $R^n$ gravity from precession of orbits of S2-like stars
• Scalar field effects on the orbit of S2 star
• Constraining the range of Yukawa gravity interaction from S2 star orbits II: Bounds on graviton mass
• Probing hybrid modified gravity by stellar motion around Galactic Centre
• Constraints on tidal charge of the supermassive black hole at the Galactic Center with trajectories of bright stars
• Constraining the range of Yukawa gravity interaction from S2 star orbits III: improvement expectations for graviton mass bounds
• Constraining Extended Gravity Models by S2 star orbits around the Galactic Centre
• Long-term classical and general relativistic effects on the radial velocities of the stars orbiting Sgr A*
• Physical laboratory at the center of the Galaxy
• Motion in time-periodic backgrounds with applications to ultralight dark matter haloes at galactic centers
• Constraints on $R^n$ gravity from precession of orbits of S2-like stars: a case of a bulk distribution of mass
• Estimating the parameters of the Sgr A* black hole
• Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star
• The black hole at the Galactic Center: observations and models
• The Galactic Center as a laboratory for theories of gravity and dark matter
• Exact expressions for the pericenter precession caused by some Dark Matter distributions and constraints on them from orbital motions in the Solar System, in the double pulsar and in the Galactic center
• Dark matter concentrations in galactic nuclei according to polytropic models
• Testing the Galactic Centre potential with S-stars
• Periapsis shifts in dark matter distribution around a black hole
• Influence of bulk mass distribution on orbital precession of S2 star in Yukawa gravity
• Estimating the parameters of Hybrid Palatini gravity model with the Schwarzschild precession of S2, S38 and S55 stars: case of bulk mass distribution
• The Scales of Gravitational Lensing
• Tests of gravity theories with Galactic Center observations
• Different ways to estimate graviton mass
• On the 2PN pericentre precession in the general theory of relativity and the recently discovered fast orbiting S-stars in Sgr A${}^{\ast }$
• Constraints on alternative theories of gravity with observations of the Galactic Center
• Dark halo microphysics and massive black hole scaling relations in galaxies
• Prospects for probing small-scale dark matter models with pulsars around Sagittarius A*
• The relativistic precession of the orbits
• Parametric-resonance based phenomenology of gravitating axion configurations
• Neural Network Analysis of S-Star Dynamics: Implications for Modified Gravity
• Post-Newtonian orbital effects induced by the mass quadrupole and spin octupole moments of an axisymmetric body
• Neural Network Analysis of S2-Star Dynamics: Extended mass
• S2-star dynamics probing the Galaxy core cluster
• Crossing the dark matter soliton core: a possible reversed orbital precession