Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies

Abstract

Searching for gamma rays from dwarf spheroidal galaxies (dSphs) is a promising approach to detect dark matter (DM) due to the high DM densities and low baryon components in dSphs. The Fermi-LAT observations from dSphs have set stringent constraints on the velocity independent annihilation cross section. However, the constraints from dSphs may change in velocity dependent annihilation scenarios because of the different velocity dispersions in galaxies. In this work, we study how to set constraints on the velocity dependent annihilation cross section from the combined Fermi-LAT observations of dSphs with the kinematic data. In order to calculate the gamma ray flux from the dSph, the correlation between the DM density profile and velocity dispersion at each position should be taken into account. We study such correlation and the relevant uncertainty from kinematic observations by performing a Jeans analysis. Using the observational results of three ultrafaint dSphs with large J-factors, including Willman 1, Reticulum II, and Triangulum II, we set constraints on the p-wave annihilation cross section in the Galaxy as an example.

arXiv comment10 pages, 13 figures

References in corpus (72)

• A Universal Density Profile from Hierarchical Clustering
• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Dwarf Galaxies of the Local Group
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• A Universal Mass Profile for Dwarf Spheroidal Galaxies?
• Analytical Models For Galactic Nuclei
• Empirical models for Dark Matter Halos. I. Nonparametric Construction of Density Profiles and Comparison with Parametric Models
• Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• Beasts of the Southern Wild: Discovery of nine Ultra Faint satellites in the vicinity of the Magellanic Clouds
• On The Origin Of The Gamma Rays From The Galactic Center
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• HI in Local Group Dwarf Galaxies and Stripping by the Galactic Halo
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite?
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models
• Galaxy Masses
• A Keck/DEIMOS spectroscopic survey of faint Galactic satellites: searching for the least massive dwarf galaxies
• Search for Gamma-ray Spectral Lines with the Fermi Large Area Telescope and Dark Matter Implications
• Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
• Fermi LAT Search for Dark Matter in Gamma-ray Lines and the Inclusive Photon Spectrum
• Dark Matter Direct Detection with Non-Maxwellian Velocity Structure
• Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
• Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
• Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
• Dark matter annihilation and decay in dwarf spheroidal galaxies: The classical and ultrafaint dSphs
• Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum II
• Search for Dark Matter Satellites using the FERMI-LAT
• Spin-independent elastic WIMP scattering and the DAMA annual modulation signal
• A New Faint Milky Way Satellite Discovered in the Pan-STARRS1 3 pi Survey
• Willman 1 - a probable dwarf galaxy with an irregular kinematic distribution
• Clean Kinematic Samples in Dwarf Spheroidals: An Algorithm for Evaluating Membership and Estimating Distribution Parameters When Contamination is Present
• Indirect Dark Matter Detection from Dwarf Satellites: Joint Expectations from Astrophysics and Supersymmetry
• Mass modelling of dwarf spheroidal galaxies: the effect of unbound stars from tidal tails and the Milky Way
• Spherical Jeans analysis for dark matter indirect detection in dwarf spheroidal galaxies - Impact of physical parameters and triaxiality
• Cores and Cusps in the Dwarf Spheroidals
• Magellan/M2FS Spectroscopy of the Reticulum 2 Dwarf Spheroidal Galaxy
• The Graininess of Dark Matter Haloes
• CLUMPY: Jeans analysis, $\gamma$-ray and neutrino fluxes from dark matter (sub-)structures
• Dynamical models with a general anisotropy profile
• Cosmological constraints on dark matter models with velocity-dependent annihilation cross section
• Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos
• Indirect Dark Matter Detection Limits from the Ultra-Faint Milky Way Satellite Segue 1
• Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy
• Extracting limits on Dark Matter annihilation from gamma-ray observations towards dwarf spheroidal galaxies
• Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
• A model-independent analysis of the Fermi Large Area Telescope gamma-ray data from the Milky Way dwarf galaxies and halo to constrain dark matter scenarios
• Dark matter substructure modelling and sensitivity of the Cherenkov Telescope Array to Galactic dark halos
• Triangulum II: a very metal-poor and dynamically hot stellar system
• Triangulum II: Possibly a Very Dense Ultra-Faint Dwarf Galaxy
• Sommerfeld-Enhanced $J$-Factors For Dwarf Spheroidal Galaxies
• Dark matter subhaloes as gamma-ray sources and candidates in the first Fermi-LAT catalogue
• Revisiting Big-Bang Nucleosynthesis Constraints on Dark-Matter Annihilation
• Constraint on the velocity dependent dark matter annihilation cross section from Fermi-LAT observations of dwarf galaxies
• A generic method to constrain the dark matter model parameters from Fermi observations of dwarf spheroids
• The importance of interloper removal in galaxy clusters: saving more objects for the Jeans analysis
• p-wave Annihilating Dark Matter from a Decaying Predecessor and the Galactic Center Excess
• Effects of Velocity-Dependent Dark Matter Annihilation on the Energy Spectrum of the Extragalactic Gamma-ray Background
• Spectral analysis of the gamma-ray background near the dwarf Milky Way satellite Segue 1: Improved limits on the cross section of neutralino dark matter annihilation
• The Potential of the Dwarf Galaxy Triangulum II for Dark Matter Indirect Detection
• Effects of P-wave Annihilation on the Angular Power Spectrum of Extragalactic Gamma-rays from Dark Matter Annihilation
• Searching for Gamma-Ray Emission from Reticulum II by Fermi-LAT

Cited by in corpus (21)

• A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
• Scattering searches for dark matter in subhalos: neutron stars, cosmic rays, and old rocks
• Effective $J$-factors for Milky Way dwarf spheroidal galaxies with velocity-dependent annihilation
• Search for gamma-ray emission from $p$-wave dark matter annihilation in the Galactic Center
• Velocity-dependent J-factors for annihilation radiation from cosmological simulations
• Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos
• Cosmic ray $e^{+}{e}^{-}$ spectrum excess and peak feature observed by the DAMPE experiment from dark matter
• The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
• MADHAT: Model-Agnostic Dark Halo Analysis Tool
• $J$-factors for Velocity-dependent Dark Matter
• Velocity-dependent annihilation radiation from dark matter subhalos in cosmological simulations
• Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
• Constraining Dark Matter Microphysics with the Annihilation Signal from Subhalos
• Searching for velocity-dependent dark matter annihilation signals from extragalactic halos
• Velocity-dependent J-factors for Milky Way dwarf spheroidal analogues in cosmological simulations
• Calculations of the Sommerfeld Effect in a Unified Wave Function Framework
• The Velocity-Dependent $J$-factor of the Milky Way Halo: Does What Happens in the Galactic Bulge Stay in the Galactic Bulge?
• Dark Matter Annihilation Feedback in Cosmological Simulations II: The Influence on Gas and Halo Structure
• On the statistical theory of self-gravitating collisionless dark matter flow: Scale and redshift variation of velocity and density distributions
• Prospects for measuring dark matter microphysics with observations of dwarf spheroidal galaxies
• Searching for dark matter annihilating into light long-lived mediators from stars inside dwarf spheroidal galaxies