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The Fermi Bubbles are gamma-ray structures extending from the center of the Milky Way to +/-50 degree Galactic latitude that were discovered in data obtained by the Fermi/LAT instrument. Their origin and power source remain uncertain. To…

High Energy Astrophysical Phenomena · Physics 2025-11-11 Ami Tank , Roland Crocker , Mark R. Krumholz

The Fermi bubbles are two large structures in the gamma-ray sky extending to $55^\circ$ above and below the Galactic center. We analyze 50 months of Fermi Large Area Telescope data between 100 MeV and 500 GeV above $10^\circ$ in Galactic…

High Energy Astrophysical Phenomena · Physics 2014-09-22 LAT Collaboration

The Fermi Bubbles, which comprise two large and homogeneous regions of spectrally hard gamma-ray emission extending up to $55^{o}$ above and below the Galactic Center, were first noticed in GeV gamma-ray data from the Fermi Telescope in…

High Energy Astrophysical Phenomena · Physics 2019-08-13 H. A. Ayala Solares , C. M. Hui , P. Hüntemeyer

The $Fermi$ gamma-ray telescope discovered a pair of bubbles at the Galactic center. These structures are spatially-correlated with the microwave emission detected by the WMAP and Planck satellites. These bubbles were likely inflated by a…

High Energy Astrophysical Phenomena · Physics 2015-06-18 M. Ruszkowski , H. -Y. K. Yang , E. Zweibel

We study the variation of the spectrum of the Fermi Bubbles with Galactic latitude. Far from the Galactic plane (|b| > 30 degrees), the observed gamma-ray emission is nearly invariant with latitude, and is consistent with arising from…

High Energy Astrophysical Phenomena · Physics 2013-02-28 Dan Hooper , Tracy R. Slatyer

Gamma-ray data from Fermi-LAT reveal a bi-lobular structure extending up to 50 degrees above and below the galactic centre, which presumably originated in some form of energy release there less than a few million years ago. It has been…

High Energy Astrophysical Phenomena · Physics 2011-08-26 Philipp Mertsch , Subir Sarkar

The origin of the Fermi bubbles and the microwave haze is yet to be determined. To disentangle different models requires detailed comparisons between theoretical predictions and multi-wavelength observations. Our previous simulations have…

Astrophysics of Galaxies · Physics 2013-10-30 H. -Y. K. Yang , M. Ruszkowski , E. Zweibel

One of the most exciting discoveries of recent years is a pair of gigantic gamma-ray emission regions, the so-called Fermi bubbles, above and below the Galactic center. The bubbles, discovered by the Fermi space telescope, extend up to…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Satyendra Thoudam

The Fermi bubbles, two giant gamma-ray bubbles above and below the Galactic center (GC), are among the most important findings of the Fermi Gamma-ray Space Telescope. Because of the proximity, spatially resolved, multi-wavelength…

High Energy Astrophysical Phenomena · Physics 2017-12-01 H. -Y. K. Yang , M. Ruszkowski

Recently, the {\it{Fermi}} space telescope has discovered two large $\gamma$-ray emission regions, the so-called "Fermi bubbles", that extend up to $\sim 50^\circ$ above and below the Galactic center. The $\gamma$-ray emission from the…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Satyendra Thoudam

The Fermi bubbles (FBs) are large gamma-ray emitting lobes extending up to $55\deg$ in latitude above and below the Galactic center (GC). Although the FBs were discovered 8 years ago, their origin and the nature of the gamma-ray emission…

High Energy Astrophysical Phenomena · Physics 2019-12-02 Laura Herold , Dmitry Malyshev

We analyze 60 months of all sky data from the Fermi-LAT. The Fermi Bubble structures discovered previously are clearly revealed by our analysis. With more data and, consequently, better statistics we can now divide each bubble into constant…

High Energy Astrophysical Phenomena · Physics 2014-07-09 Rui-zhi Yang , Felix Aharonian , Roland Crocker

The Fermi bubbles are part of a complex region of the Milky Way. This region presents broadband extended non-thermal radiation, apparently coming from a physical structure rooted in the Galactic Centre and with a partly-ordered magnetic…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Maxim V. Barkov , Valenti Bosch-Ramon

Fermi bubbles are giant gamma-ray structures extended north and south of the Galactic center with characteristic sizes of order of 10 kpc recently discovered by Fermi Large Area Telescope. Good correlation between radio and gamma-ray…

Astrophysics of Galaxies · Physics 2015-06-23 D. O. Chernyshov , K. S. Cheng , V. A. Dogiel , C. M. Ko

Recently evidence has emerged for enormous features in the gamma-ray sky observed by the Fermi-LAT instrument: bilateral `bubbles' of emission centered on the core of the Galaxy and extending to around 10 kpc above and below the Galactic…

Astrophysics of Galaxies · Physics 2011-03-24 Roland M. Crocker , Felix Aharonian

Fermi-LAT reveals two huge gamma-ray bubbles existing in the Galactic Center, called 'Fermi Bubbles'. The existence of two microwave bubbles at the same region are also reported by the observation by WMAP, dubbed 'WMAP haze'. In order to…

High Energy Astrophysical Phenomena · Physics 2015-02-11 K. Sasaki , K. Asano , T. Terasawa

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

High Energy Astrophysical Phenomena · Physics 2011-01-03 Meng Su , Tracy R. Slatyer , Douglas P. Finkbeiner

Current measurements of the $\gamma$-ray Fermi bubbles (FB) are based on model-dependent tracers, carry substantial systematic uncertainties, and are at some tension with each other. We show that gradient filters pick out the FB edges,…

High Energy Astrophysical Phenomena · Physics 2017-06-16 Uri Keshet , Ilya Gurwich

The origin of the Fermi bubbles, which constitute two gamma-ray emitting lobes above and below the Galactic plane, remains unclear. The possibility that this Fermi bubbles gamma-ray emission originates from hadronic cosmic rays advected by…

High Energy Astrophysical Phenomena · Physics 2022-12-07 Olivier Tourmente , Donna Rodgers-Lee , Andrew M. Taylor

The Fermi Bubbles are enigmatic \gamma-ray features of the Galactic bulge. Both putative activity (within $\sim$ few $\times$ Myr) connected to the Galactic center super-massive black hole and, alternatively, nuclear star formation have…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Roland M. Crocker , Geoffrey V. Bicknell , Ettore Carretti , Alex S. Hill , Ralph S. Sutherland
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