Gamma-Rays from Dark Matter Mini-Spikes in M31

Abstract

The existence of a population of wandering Intermediate Mass Black Holes (IMBHs) is a generic prediction of scenarios that seek to explain the formation of Supermassive Black Holes in terms of growth from massive seeds. The growth of IMBHs may lead to the formation of DM overdensities called "mini-spikes", recently proposed as ideal targets for indirect DM searches. Current ground-based gamma-ray experiments, however, cannot search for these objects due to their limited field of view, and it might be challenging to discriminate mini-spikes in the Milky Way from the many astrophysical sources that GLAST is expected to observe. We show here that gamma-ray experiments can effectively search for IMBHs in the nearby Andromeda galaxy (also known as M31), where mini-spikes would appear as a distribution of point-sources, isotropically distributed in a \thickapprox 3^{\circ} circle around the galactic center. For a neutralino-like DM candidate with a mass m_χ=150 GeV, up to 20 sources would be detected with GLAST (at 5σ, in 2 months). With Air Cherenkov Telescopes such as MAGIC and VERITAS, up to 10 sources might be detected, provided that the mass of neutralino is in the TeV range or above.

9 pages, 5 figures

References in corpus (57)

• A Universal Density Profile from Hierarchical Clustering
• Particle Dark Matter: Evidence, Candidates and Constraints
• Bounds on Universal Extra Dimensions
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation
• A Survey of z>5.8 Quasars in the Sloan Digital Sky Survey I: Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z~6
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research
• Dark matter annihilation at the galactic center
• Is the Lightest Kaluza-Klein Particle a Viable Dark Matter Candidate?
• Measuring gravitational waves from binary black hole coalescences: I. Signal to noise for inspiral, merger, and ringdown
• Theoretical Black Hole Mass Distributions
• Intermediate-Mass Black Holes
• Earth-mass dark-matter haloes as the first structures in the early Universe
• Bosonic Supersymmetry? Getting Fooled at the LHC
• Fragmentation Functions from Flavour-inclusive and Flavour-tagged e^+e^- Annihilations
• A Dark-Matter Spike at the Galactic Center?
• Cosmological dark matter annihilations into gamma-rays - a closer look
• Massive black hole seeds from low angular momentum material
• Dark Matter Detection in the Light of Recent Experimental Results
• Measuring gravitational waves from binary black hole coalescences: II. the waves' information and its extraction, with and without templates
• What is the Highest Plausible Redshift of Luminous Quasars?
• A 3x10^9 solar mass black hole in the quasar SDSS J1148+5251 at z=6.41
• H.E.S.S. observations of the Galactic Center region and their possible dark matter interpretation
• Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
• Dark Matter Spikes and Annihilation Radiation from the Galactic Center
• Gamma Rays from Kaluza-Klein Dark Matter
• Discrimination of Supersymmetry and Universal Extra Dimensions at Hadron Colliders
• Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
• Time-Dependent Models for Dark Matter at the Galactic Center
• A New Signature of Dark Matter Annihilations: Gamma-Rays from Intermediate-Mass Black Holes
• Models of Galaxies with Central Black Holes: Adiabatic Growth in Spherical Galaxies
• Iron Emission in the z=6.4 Quasar SDSS J114816.64+525150.3
• Investigating the Andromeda Stream: I. Simple Analytic Bulge-Disk-Halo Model for M31
• Neutralino annihilation into gamma-rays in the Milky Way and in external galaxies
• The Clumpiness of Cold Dark Matter: Implications for the Annihilation Signal
• The Galactic Center as a Dark Matter Gamma-Ray Source
• The surface brightness of dark matter: unique signatures of neutralino annihilation in the Galactic halo
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter
• Dark matter annihilation or unresolved astrophysical sources? Anisotropy probe of the origin of cosmic gamma-ray background
• Annihilation Radiation from a Dark Matter Spike at the Galactic Centre
• Massive black hole remnants of the first stars in galactic haloes
• Mini-dark halos with intermediate mass black holes
• The observability of gamma-rays from neutralino annihilations in Milky Way substructure
• Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS
• Collisionally Regenerated Dark Matter Structures in Galactic Nuclei
• Can Dark Matter Annihilation Dominate the Extragalactic Gamma-Ray Background?
• Either neutralino dark matter or cuspy dark halos
• Challenges in Detecting Gamma-Rays From Dark Matter Annihilations in the Galactic Center
• Possible Indications of a Clumpy Dark Matter Halo
• Adiabatic compression and indirect detection of supersymmetric dark matter
• Difficulty of detecting minihalos via $\gamma$-rays from dark matter annihilation
• On Dark Matter Annihilation in the Local Group
• Dark matter annihilation from intermediate-mass black holes: Contribution to the extragalactic gamma-ray background
• Gamma-Ray Constraints on Neutralino Dark Matter Clumps in the Galactic Halo
• Impact of astrophysical processes on the gamma-ray background from dark matter annihilations
• Massive black hole remnants of the first stars III: observational signatures from the past

Cited by in corpus (11)

• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• Conservative Constraints on Dark Matter Annihilation into Gamma Rays
• Constraints on dark matter annihilation by radio observations of M31
• Angular correlations in the cosmic gamma-ray background from dark matter annihilation around intermediate-mass black holes
• Dark Matter Annihilation around Intermediate Mass Black Holes: an update
• Dark matter subhalos and unidentified sources in the Fermi 3FGL source catalog
• Search for Gamma-rays from Dark Matter annihilations around Intermediate Mass Black Holes with the H.E.S.S. experiment
• Black Holes as Dark Matter Annihilation Boosters
• No WIMP Mini-Spikes in Dwarf Spheroidal Galaxies
• Investigating the dark matter minispikes with the gamma-ray signal from the halo of M31
• Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation