Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter

@article{Hooper2013TwoEM,
  title={Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter},
  author={Dan Hooper and Tracy R. Slatyer},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2013}
}
  • D. HooperT. Slatyer
  • Published 26 February 2013
  • Physics
  • arXiv: High Energy Astrophysical Phenomena
View PDF on arXiv
253 Citations
Highly Influential Citations
18
Background Citations
87
Methods Citations
14
Results Citations
11

253 Citations

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References

SHOWING 1-10 OF 48 REFERENCES

Fermi bubbles: giant, multibillion-year-old reservoirs of Galactic center cosmic rays.

It is shown that the bubbles of emission centered on the core of the Galaxy and extending to around ± 10 kpc from the Galactic plane are naturally explained as due to a population of relic cosmic ray protons and heavier ions injected by processes associated with extremely long time scale and high areal density star formation in the Galactic center.

DARK MATTER AND SYNCHROTRON EMISSION FROM GALACTIC CENTER RADIO FILAMENTS

The inner degrees of the Galactic center contain a large population of filamentary structures observed at radio frequencies. These so-called non-thermal radio filaments (NRFs) trace magnetic field…

GIANT GAMMA-RAY BUBBLES FROM FERMI-LAT: ACTIVE GALACTIC NUCLEUS ACTIVITY OR BIPOLAR GALACTIC WIND?

Data from the Fermi-LAT reveal two large gamma-ray bubbles, extending 50° above and below the Galactic center (GC), with a width of about 40° in longitude. The gamma-ray emission associated with…

THE FERMI BUBBLES: SUPERSONIC ACTIVE GALACTIC NUCLEUS JETS WITH ANISOTROPIC COSMIC-RAY DIFFUSION

The Fermi Gamma-Ray Space Telescope reveals two large bubbles in the Galaxy, which extend nearly symmetrically ∼50° above and below the Galactic center. Using three-dimensional (3D)…

Dark matter annihilation in the Galactic Center as seen by the Fermi Gamma Ray Space Telescope

Gamma-ray lines in the Fermi data: is it a bubble?

Recently, tentative evidence for an excess of gamma rays at energies around 130 GeV has been reported from analyses of data from the Fermi Large Area Telescope (LAT). The excess is potentially of…

THE FERMI BUBBLES. I. POSSIBLE EVIDENCE FOR RECENT AGN JET ACTIVITY IN THE GALAXY

The Fermi Gamma-ray Space Telescope reveals two large gamma-ray bubbles in the Galaxy, which extend about 50° (∼10 kpc) above and below the Galactic center (GC) and are symmetric about the Galactic…

Possibility of testing the light dark matter hypothesis with the alpha magnetic spectrometer.

It is shown that while a positron bump at around 7-10 GeV would be difficult to detect with PAMELA, it would likely be identifiable by the currently operating Alpha Magnetic Spectrometer experiment.

ORIGIN OF THE FERMI BUBBLE

Fermi has discovered two giant gamma-ray-emitting bubbles that extend nearly 10 kpc in diameter north and south of the Galactic center. The existence of the bubbles was first evidenced in X-rays…

The Empirical Case For 10 GeV Dark Matter