Power spectrum tomography of dark matter annihilation with local galaxy distribution

Ando, Shinʼichiro

doi:10.1088/1475-7516/2014/10/061

Cited by 41 publications

(48 citation statements)

References 61 publications

(178 reference statements)

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“…In addition, we find that for 10 13 GeV m dm 10 16 GeV the PAO constraints are comparable to those obtained with Fermi-LAT. Although the constraints obtained with our extragalactic predictions are found to be weaker than those using the Galactic component, our simulations could potentially be used in future analyses of all sky gamma-ray analyses of, for example, tomographic cross-correlation using the local galaxy distributions [83][84][85][86][87][88].…”

Section: Constraints On Dark Matter Lifetimementioning

confidence: 99%

Probing heavy dark matter decays with multi-messenger astrophysical data

Ishiwata

Macías

Ando

et al. 2020

J. Cosmol. Astropart. Phys.

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We set conservative constraints on decaying dark matter particles with masses spanning a very wide range (10 4 − 10 16 GeV). For this we use multimessenger observations of cosmic-ray (CR) protons/antiprotons, electrons/positrons, neutrinos/antineutrinos and gamma rays. Focusing on decays into thebb channel, we simulate the spectra of dark matter yields by using the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi equations and the Pythia package. We then propagate the CRs of dark matter origin till Earth by using the stateof-the-art numerical frameworks CRPropa, GALPROP and HelMod for the solution of the CR transport equation in the extragalactic, Galactic region and the heliosphere, respectively. Conservative limits are obtained by requiring that the predicted dark matter spectra at Earth be less than the observed CR spectra. Overall, we exclude dark matter lifetimes of 10 28 s or shorter for all the masses investigated in this work. The most stringent constraints reach 10 30 s for very heavy dark matter particles with masses in the range 10 11 -10 14 GeV.

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Section: Constraints On Dark Matter Lifetimementioning

confidence: 99%

Probing heavy dark matter decays with multi-messenger astrophysical data

Ishiwata

Macías

Ando

et al. 2020

J. Cosmol. Astropart. Phys.

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“…[52], which analyzed the IGRB data and found that they were spatially correlated with galaxy distributions. Compared to the commonly adopted spectral analysis, the tomographic method allows us to efficiently extract a dominant IGRB component in certain redshift ranges following galaxy catalogs, as originally proposed for dark matter detection [53][54][55]. This provides stringent constraints on astrophysical sources [52] and dark matter [56].…”

Section: Tomographic Constraints On High-energy Neutrinos Of Hadronucmentioning

confidence: 99%

Tomographic Constraints on High-Energy Neutrinos of Hadronuclear Origin

2015

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Mounting evidence suggests that the TeV-PeV neutrino flux detected by the IceCube telescope has mainly an extragalactic origin. If such neutrinos are primarily produced by a single class of astrophysical sources via hadronuclear (pp) interactions, a similar flux of gamma-ray photons is expected. For the first time, we employ tomographic constraints to pinpoint the origin of the IceCube neutrino events by analyzing recent measurements of the cross correlation between the distribution of GeV gamma rays, detected by the Fermi satellite, and several galaxy catalogs in different redshift ranges. We find that the corresponding bounds on the neutrino luminosity density are up to 1 order of magnitude tighter than those obtained by using only the spectrum of the gamma-ray background, especially for sources with mild redshift evolution. In particular, our method excludes any hadronuclear source with a spectrum softer than E −2.1 as a main component of the neutrino background, if its evolution is slower than ð1 þ zÞ 3 . Starburst galaxies, if able to accelerate and confine cosmic rays efficiently, satisfy both spectral and tomographic constraints. Introduction.-The discovery of the PeV neutrinos by IceCube [1,2] has launched the era of high-energy neutrino astronomy. The current data set is compatible with a flux in excess with respect to the atmospheric background, with an isotropic allocation of events on the celestial sphere and flavor equipartition [1][2][3][4][5][6]. Because of the current low statistics, the origin of the high-energy IceCube events is not yet known, but an extragalactic and mostly diffuse origin appears to be favored [7,8].High-energy neutrino production from cosmic accelerators has been the subject of a cascade of theoretical studies, especially after the IceCube results were announced [7,8]. Many papers discuss the neutrino emission from one specific source class by adopting a modeldependent approach, for active galactic nuclei (AGNs) [9][10][11][12][13][14][15][16][17][18], star-forming galaxies [19][20][21][22][23][24][25][26][27][28], gamma-ray bursts [29][30][31][32][33][34][35][36], galaxy clusters [37][38][39][40], and dark matter decays [41][42][43][44][45].Alternatively, a more generic approach focuses on the phenomenological aspects of the potential sources. For example, assuming photomeson production (pγ) of neutrinos, Ref.[46] obtained constraints on the source size and magnetic field strength needed to match the IceCube flux. Reference [47] hypothesized that the TeV-PeV neutrinos were generated via hadronuclear interactions (pp) and concluded that the cosmic ray spectrum of the dominant neutrino sources should be harder than E −2.2 . This is because the associated gamma-ray spectrum will extend down to GeV energies, where the flux of the isotropic gamma-ray background (IGRB) measured with the Fermi Large Area Telescope (LAT) [48] cannot be overshot. The connection with sources of ultrahigh-energy cosmic rays has also been considered [49][50][51].

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“…It is suggested that the crosscorrelation of local galaxies and the cosmic infrared back-ground helps to infer the star-forming activity in galaxies over a wider range of redshifts [17,56,57], while observations of galaxy clusters, radio galaxies, and the CMB lensing effect will tighten the constraints on the contribution from misaligned AGN [18,20]. Furthermore, a tomographic approach using γ-ray energies and redshifts of LSS tracers will be viable with upcoming galaxy surveys [25,58]. Ultimately, by putting all these information together, we will be able to understand the contributions to the EGB and perform stringent searches on the particle nature of dark matter.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Correlation of extragalactic γ rays with cosmic matter density distributions from weak gravitational lensing

et al. 2018

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The extragalactic γ-ray background (EGB) arises from the accumulation of γ-ray emissions from resolved and unresolved extragalactic sources as well as diffuse processes. It is important to study the statistical properties of the EGB in the context of cosmological structure formation. Known astrophysical γ-ray sources such as blazars, star-forming galaxies, and radio galaxies are expected to trace the underlying cosmic matter density distribution. We explore the correlation of the EGB from Fermi-LAT data with the large-scale matter density distribution from the Subaru Hyper Suprime-Cam (HSC) SSP survey. We reconstruct an unbiased surface matter density distribution κ at z < ∼ 1 by applying weak-gravitational lensing analysis to the first-year HSC data. We then calculate the γ − κ cross-correlation. Our measurements are consistent with a null detection, but a weak correlation is found at angular scales of 30-60 arcmin, especially when distant source galaxies at z > 1 are used for the lensing κ reconstruction. The large-scale correlation suggests strong clustering of high-redshift γ-ray sources such as blazars. However, the inferred bias factor of 4 − 5 is larger by about a factor of two than results from other clustering analyses. The final HSC data covering 1,400 squared degrees will play an essential role to determine accurately the blazar bias at z > 0.5.

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Power spectrum tomography of dark matter annihilation with local galaxy distribution

Cited by 41 publications

References 61 publications

Probing heavy dark matter decays with multi-messenger astrophysical data

Probing heavy dark matter decays with multi-messenger astrophysical data

Tomographic Constraints on High-Energy Neutrinos of Hadronuclear Origin

Correlation of extragalactic γ rays with cosmic matter density distributions from weak gravitational lensing

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