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Related papers: Dwarf spheroidal $J$-factor likelihoods for genera…

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Line-of-sight integrals of the squared density, commonly called the J-factor, are essential for inferring dark matter annihilation signals. The J-factors of dark matter-dominated dwarf spheroidal satellite galaxies (dSphs) have typically…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-18 A. Chiappo , J. Cohen-Tanugi , J. Conrad , L. E. Strigari , B. Anderson , M. A. Sanchez-Conde

Due to their large dynamical mass-to-light ratios, dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter (DM) in gamma-rays. We examine their detectability by present and future gamma-ray…

High Energy Astrophysical Phenomena · Physics 2015-05-27 A. Charbonnier , C. Combet , M. Daniel , S. Funk , J. A. Hinton , D. Maurin , C. Power , J. I. Read , S. Sarkar , M. G. Walker , M. I. Wilkinson

Milky Way dwarf spheroidal satellites are a prime target for Dark Matter (DM) indirect searches. There have been recent reassessments of the expected DM gamma-ray signals in case of long-range interactions, commonly known as Sommerfeld…

Astrophysics of Galaxies · Physics 2018-12-21 Mihael Petac , Piero Ullio , Mauro Valli

Dwarf spheroidal (dSph) galaxies are among the most promising targets for the indirect detection of dark matter (DM) from annihilation and/or decay products. Empirical estimates of their DM content - and hence the magnitudes of expected…

High Energy Astrophysical Phenomena · Physics 2014-12-15 V. Bonnivard , C. Combet , D. Maurin , M. G. Walker

The Sagittarius Dwarf Spheroidal galaxy (Sgr) is investigated as a target for DM annihilation searches utilising J-factor distributions calculated directly from a high-resolution hydrodynamic simulation of the infall and tidal disruption of…

High Energy Astrophysical Phenomena · Physics 2023-11-15 Thomas A. A. Venville , Alan R. Duffy , Roland M. Crocker , Oscar Macias , Thor Tepper-García

We investigate dwarf irregular(dIrr) galaxies as a new category of targets for indirect Dark Matter(DM) searches with gamma-rays. In the framework of point-like analysis, dwarf spheroidal(dSph) galaxies are usually considered as one of the…

Cosmology and Nongalactic Astrophysics · Physics 2018-10-24 V. Gammaldi , E. V. Karukes , P. Salucci

Dwarf spheroidal galaxies (dSphs) are promising targets of indirect detection experiments searching for dark matter (DM) at present universe. Toward robust prediction for the amount of signal flux originating in DM annihilation inside…

Astrophysics of Galaxies · Physics 2020-09-30 Shun-ichi Horigome , Kohei Hayashi , Masahiro Ibe , Miho N. Ishigaki , Shigeki Matsumoto , Hajime Sugai

We present an updated analysis of the gamma-ray flux from the directions of classical dwarf spheroidal galaxies, deriving new constraints on WIMP dark matter (DM) annihilation using a decade of Fermi-LAT data. Among the major novelties, we…

High Energy Astrophysical Phenomena · Physics 2021-02-15 Alexandre Alvarez , Francesca Calore , Anna Genina , Justin I. Read , Pasquale D. Serpico , Bryan Zaldivar

Indirect dark matter searches targeting dwarf spheroidal galaxies (dSphs) have matured rapidly during the past decade. This has been because of the substantial increase in kinematic data sets from the dSphs, the new dSphs that have been…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-23 Louis E. Strigari

Dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density. They are often used to…

High Energy Physics - Phenomenology · Physics 2016-06-01 Matthew G. Baring , Tathagata Ghosh , Farinaldo S. Queiroz , Kuver Sinha

Dark matter halos of dwarf spheroidal galaxies (dSphs) play important roles in dark matter detection. Generally we estimate the halo profile using a kinematical equation of dSphs but the halo profile has a large uncertainty because we have…

Cosmology and Nongalactic Astrophysics · Physics 2023-11-16 Shun'ichi Horigome , Kohei Hayashi , Shin'ichiro Ando

Dwarf spheroidal galaxies (dSphs) are promising targets for the gamma-ray dark matter (DM) search. In particular, DM annihilation signal is expected to be strong in some of the recently discovered nearby ultra-faint dSphs, which potentially…

Dwarf satellite galaxies are ideal laboratories for identifying particle Dark Matter signals. When setting limits on particle Dark Matter properties from null searches, it becomes however crucial the level at which the Dark Matter density…

Astrophysics of Galaxies · Physics 2016-07-26 Piero Ullio , Mauro Valli

Gamma-ray experiments seeking to detect evidence of dark matter annihilation in dwarf spheroidal galaxies require knowledge of the distribution of dark matter within these systems. We analyze the effects of flattening on the annihilation…

Astrophysics of Galaxies · Physics 2016-09-21 Jason L. Sanders , N. Wyn Evans , Alex Geringer-Sameth , Walter Dehnen

For models in which 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…

Cosmology and Nongalactic Astrophysics · Physics 2017-06-20 Kimberly K. Boddy , Jason Kumar , Louis E. Strigari , Mei-Yu Wang

We calculate the effective $J$-factors, which determine the strength of indirect detection signals from dark matter annihilation, for 25 dwarf spheroidal galaxies (dSphs). We consider several well-motivated assumptions for the relative…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-04 Kimberly K. Boddy , Jason Kumar , Andrew B. Pace , Jack Runburg , Louis E. Strigari

Dwarf spheroidal galaxies are among the most promising targets for indirect dark matter (DM) searches in $\gamma$-rays. The $\gamma$-ray flux from DM annihilation in a dwarf spheroidal galaxy is proportional to the $J$-factor of the source.…

The gamma-ray observation of the dwarf spheroidal galaxies (dSphs) is a promising approach to search for the dark matter annihilation (or decay) signal. The dSphs are the nearby satellite galaxies with a clean environment and dense dark…

Measuring the dark matter distribution in dwarf spheroidal galaxies (dSphs) from stellar kinematics is crucial for indirect dark matter searches, as these distributions set the fluxes for both dark matter annihilation (J-Factor) and decay…

Astrophysics of Galaxies · Physics 2018-10-31 Andrew B. Pace , Louis E. Strigari

The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide range of techniques, such as direct searches for DM…

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