Sommerfeld-enhanced J-factors for dwarf spheroidal galaxies

Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E.; Wang, Mei-Yu

doi:10.1103/PhysRevD.95.123008

Title: Sommerfeld-enhanced $J$ -factors for dwarf spheroidal galaxies

Abstract

For models where dark matter annihilation is Sommerfeld-enhanced, the annihilation cross section increases at low relative velocities. Dwarf spheroidal galaxies (dSphs) have low characteristic dark matter particle velocities and are thus ideal candidates to study such models. Here, we model the dark matter phase space of dSphs as isotropic and spherically-symmetric, and determine the J-factors for several of the most important targets for indirect dark matter searches. For Navarro-Frenk-White density profiles, we quantify the scatter in the J-factor arising from the astrophysical uncertainty in the dark matter potential. We show that, in Sommerfeld-enhanced models, the ordering of the most promising dSphs may be different relative to the standard case of velocity-independent cross sections. This result can have important implications for derived upper limits on the annihilation cross section, or on possible signals, from dSphs

Authors:

Boddy, Kimberly K. ^[1]; Kumar, Jason ^[1]; Strigari, Louis E. ^[2]; Wang, Mei-Yu ^[2]

Univ. of Hawaii, Honolulu, HI (United States)
Texas A & M Univ., College Station, TX (United States)

Publication Date:: Fri Jun 16 00:00:00 EDT 2017

Research Org.:: Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:: 1598604

Grant/Contract Number:: SC0010504; PHY-1250573; PHY-1522717

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 95; Journal Issue: 12; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Boddy, Kimberly K., Kumar, Jason, Strigari, Louis E., and Wang, Mei-Yu. Sommerfeld-enhanced J-factors for dwarf spheroidal galaxies.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevD.95.123008.

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                    Boddy, Kimberly K., Kumar, Jason, Strigari, Louis E., & Wang, Mei-Yu. Sommerfeld-enhanced J-factors for dwarf spheroidal galaxies.  United States.  https://doi.org/10.1103/PhysRevD.95.123008

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                    Boddy, Kimberly K., Kumar, Jason, Strigari, Louis E., and Wang, Mei-Yu. Fri .  
"Sommerfeld-enhanced J-factors for dwarf spheroidal galaxies".  United States.  https://doi.org/10.1103/PhysRevD.95.123008.  https://www.osti.gov/servlets/purl/1598604.

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@article{osti_1598604,

  title        = {Sommerfeld-enhanced J-factors for dwarf spheroidal galaxies},

  author       = {Boddy, Kimberly K. and Kumar, Jason and Strigari, Louis E. and Wang, Mei-Yu},

  abstractNote = {For models where dark matter annihilation is Sommerfeld-enhanced, the annihilation cross section increases at low relative velocities. Dwarf spheroidal galaxies (dSphs) have low characteristic dark matter particle velocities and are thus ideal candidates to study such models. Here, we model the dark matter phase space of dSphs as isotropic and spherically-symmetric, and determine the J-factors for several of the most important targets for indirect dark matter searches. For Navarro-Frenk-White density profiles, we quantify the scatter in the J-factor arising from the astrophysical uncertainty in the dark matter potential. We show that, in Sommerfeld-enhanced models, the ordering of the most promising dSphs may be different relative to the standard case of velocity-independent cross sections. This result can have important implications for derived upper limits on the annihilation cross section, or on possible signals, from dSphs},

  doi          = {10.1103/PhysRevD.95.123008},

  journal      = {Physical Review D},

  number       = 12,

  volume       = 95,

  place        = {United States},

  year         = {Fri Jun 16 00:00:00 EDT 2017},

  month        = {Fri Jun 16 00:00:00 EDT 2017}

}

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Two-integral distribution functions in axisymmetric galaxies: Implications for dark matter searches
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Petač, Mihael; Ullio, Piero
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Two-integral distribution functions in axisymmetric galaxies: implications for dark matter searches
text, January 2018

Petac, Mihael; Ullio, Piero
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A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
text, January 2018

Hoof, Sebastian; Geringer-Sameth, Alex; Trotta, Roberto
arXiv
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Title: Sommerfeld-enhanced J -factors for dwarf spheroidal galaxies

Abstract

Citation Formats

Dark matter annihilation rates with velocity-dependent annihilation cross sections journal, April 2009

The Kinematics of the Ultra‐faint Milky Way Satellites: Solving the Missing Satellite Problem journal, November 2007

Dwarf Galaxy Annihilation and Decay Emission Profiles for dark Matter Experiments journal, March 2015

Indirect dark matter detection limits from the ultrafaint Milky Way satellite Segue 1 journal, December 2010

Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum ii journal, July 2015

Dark matter annihilation and decay in dwarf spheroidal galaxies: the classical and ultrafaint dSphs journal, August 2015

Indication of Gamma-Ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II journal, August 2015

CLUMPY : Jeans analysis, γ -ray and ν fluxes from dark matter (sub-)structures journal, March 2016

The Observed Properties of Dwarf Galaxies in and Around the Local Group journal, June 2012

Distribution Functions for Cuspy Dark Matter Density Profiles journal, November 2000

Indirect Dark Matter detection from Dwarf satellites: joint expectations from astrophysics and supersymmetry journal, June 2009

MAGELLAN /M2FS SPECTROSCOPY OF THE RETICULUM 2 DWARF SPHEROIDAL GALAXY journal, July 2015

Sommerfeld enhancements for thermal relic dark matter journal, October 2010

Eight Ultra-Faint Galaxy Candidates Discovered in year two of the dark Energy Survey journal, November 2015

Dwarf spheroidal J-factors without priors: A likelihood-based analysis for indirect dark matter searches journal, November 2016

Simple J-factors and D-factors for indirect dark matter detection journal, May 2016

Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies journal, February 2016

Consistent scenarios for cosmic-ray excesses from Sommerfeld-enhanced dark matter annihilation journal, May 2011

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data journal, November 2015

The shape of dark matter subhaloes in the Aquarius simulations journal, February 2014

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A robust determination of Milky Way satellite properties using hierarchical mass modelling journal, June 2015

Planck 2015 results : XIII. Cosmological parameters journal, September 2016

Internal kinematics and dynamical models of dwarf spheroidal galaxies around the Milky Way journal, September 2013

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The Aquarius Project: the subhaloes of galactic haloes journal, December 2008

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Comprehensive search for dark matter annihilation in dwarf galaxies journal, April 2015

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Constraining the dark matter annihilation cross-section with Cherenkov telescope observations of dwarf galaxies journal, November 2009

A Complete Spectroscopic Survey of the Milky way Satellite Segue 1: the Darkest Galaxy journal, May 2011

Distribution function of dark matter journal, January 2006

Two-integral distribution functions in axisymmetric galaxies: Implications for dark matter searches journal, February 2019

A global analysis of dark matter signals from 27 dwarf spheroidal galaxies using 11 years of Fermi-LAT observations journal, February 2020

Dark matter in dwarf spheroidal galaxies and indirect detection: a review journal, March 2018

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Two-integral distribution functions in axisymmetric galaxies: implications for dark matter searches text, January 2018

A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations text, January 2018

Title: Sommerfeld-enhanced $J$ -factors for dwarf spheroidal galaxies

Dark matter annihilation rates with velocity-dependent annihilation cross sections
journal, April 2009

The Kinematics of the Ultra‐faint Milky Way Satellites: Solving the Missing Satellite Problem
journal, November 2007

Dwarf Galaxy Annihilation and Decay Emission Profiles for dark Matter Experiments
journal, March 2015

Indirect dark matter detection limits from the ultrafaint Milky Way satellite Segue 1
journal, December 2010

Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum ii
journal, July 2015

Dark matter annihilation and decay in dwarf spheroidal galaxies: the classical and ultrafaint dSphs
journal, August 2015

Indication of Gamma-Ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
journal, August 2015

CLUMPY : Jeans analysis, $γ$ -ray and $ν$ fluxes from dark matter (sub-)structures
journal, March 2016

The Observed Properties of Dwarf Galaxies in and Around the Local Group
journal, June 2012

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journal, November 2000

Indirect Dark Matter detection from Dwarf satellites: joint expectations from astrophysics and supersymmetry
journal, June 2009

MAGELLAN /M2FS SPECTROSCOPY OF THE RETICULUM 2 DWARF SPHEROIDAL GALAXY
journal, July 2015

Sommerfeld enhancements for thermal relic dark matter
journal, October 2010

Eight Ultra-Faint Galaxy Candidates Discovered in year two of the dark Energy Survey
journal, November 2015

Dwarf spheroidal J-factors without priors: A likelihood-based analysis for indirect dark matter searches
journal, November 2016

Simple J-factors and D-factors for indirect dark matter detection
journal, May 2016

Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
journal, February 2016

Consistent scenarios for cosmic-ray excesses from Sommerfeld-enhanced dark matter annihilation
journal, May 2011

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data
journal, November 2015

The shape of dark matter subhaloes in the Aquarius simulations
journal, February 2014

Galactic searches for dark matter
journal, October 2013

Constraint on the velocity dependent dark matter annihilation cross section from Fermi-LAT observations of dwarf galaxies
journal, April 2016

SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI -LAT
journal, January 2017

A Method for Measuring (Slopes of) the mass Profiles of Dwarf Spheroidal Galaxies
journal, November 2011

ESTIMATING THE GeV EMISSION OF MILLISECOND PULSARS IN DWARF SPHEROIDAL GALAXIES
journal, November 2016

A robust determination of Milky Way satellite properties using hierarchical mass modelling
journal, June 2015

Planck 2015 results : XIII. Cosmological parameters
journal, September 2016

Internal kinematics and dynamical models of dwarf spheroidal galaxies around the Milky Way
journal, September 2013

Model comparison of the dark matter profiles of Fornax, Sculptor, Carina and Sextans
journal, October 2013

The Aquarius Project: the subhaloes of galactic haloes
journal, December 2008

The impact of the phase-space density on the indirect detection of dark matter
journal, September 2013

Comprehensive search for dark matter annihilation in dwarf galaxies
journal, April 2015

Self-consistent calculation of the Sommerfeld enhancement
journal, June 2016

Constraining the dark matter annihilation cross-section with Cherenkov telescope observations of dwarf galaxies
journal, November 2009

A Complete Spectroscopic Survey of the Milky way Satellite Segue 1: the Darkest Galaxy
journal, May 2011

Distribution function of dark matter
journal, January 2006

Two-integral distribution functions in axisymmetric galaxies: Implications for dark matter searches
journal, February 2019

A global analysis of dark matter signals from 27 dwarf spheroidal galaxies using 11 years of Fermi-LAT observations
journal, February 2020

Dark matter in dwarf spheroidal galaxies and indirect detection: a review
journal, March 2018

Model-independent constraints on dark matter annihilation in dwarf spheroidal galaxies
text, January 2018

Two-integral distribution functions in axisymmetric galaxies: implications for dark matter searches
text, January 2018

A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
text, January 2018