Searching for Gamma-Ray Emission from Reticulum II by Fermi-LAT

Abstract

Recently, many new dwarf spheroidal satellites (dSphs) have been discovered by the Dark Energy Survey (DES). These dSphs are ideal candidates for probing for gamma-ray emissions from dark matter (DM) annihilation. However, no significant signature has been found by the Fermi-LAT dSph observations. In this work, we reanalyze the Fermi-LAT Pass 8 data from the direction of Reticulum II, where a slight excess has been reported by some previous studies. We treat Reticulum II (DES J0335.6-5403) as a spatially extended source, and and that no significant gamma-ray signature is observed. Based on this result, we set upper-limits on the DM annihilation cross section.

arXiv comment7 pages, 5 figures

References in corpus (51)

• The Sloan Digital Sky Survey: Technical Summary
• 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 Dark Energy Survey: more than dark energy - an overview
• 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
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• 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
• Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey
• On The Origin Of The Gamma Rays From The Galactic Center
• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• 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
• Background model systematics for the Fermi GeV excess
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• 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
• Weak Corrections are Relevant for Dark Matter Indirect Detection
• Strong support for the millisecond pulsar origin of the Galactic center GeV excess
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models
• Evidence for Unresolved Gamma-Ray Point Sources in the Inner Galaxy
• Search for Gamma-ray Spectral Lines with the Fermi Large Area Telescope and Dark Matter Implications
• Fermi LAT Search for Dark Matter in Gamma-ray Lines and the Inclusive Photon Spectrum
• Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• 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
• Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data
• GeV excess in the Milky Way: The Role of Diffuse Galactic gamma ray Emission template
• Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum II
• Search for Dark Matter Satellites using the FERMI-LAT
• A Comprehensive Search for Dark Matter Annihilation in Dwarf Galaxies
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• On The Gamma-Ray Emission From Reticulum II and Other Dwarf Galaxies
• Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos
• Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy
• Gamma Rays From The Galactic Center and the WMAP Haze
• Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data
• Towards a realistic astrophysical interpretation of the gamma-ray Galactic center excess
• 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 subhaloes as gamma-ray sources and candidates in the first Fermi-LAT catalogue
• Constraint on the velocity dependent dark matter annihilation cross section from Fermi-LAT observations of dwarf galaxies

Cited by in corpus (7)

• A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
• Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
• Dark Matter Density Profiles in Dwarf Galaxies: Linking Jeans Modeling Systematics and Observation
• TeV Dark Matter Searches in the Extragalactic Gamma-Ray Sky
• Analysis of Fermi-LAT data from Tucana-II: Possible constraints on the Dark Matter models with an intriguing hint of a signal
• Dark matter, extra-terrestrial gamma-rays and the MSSM: a viability study
• WIMP Dark Matter Searches in Reticulum II Using MeerKAT