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The origin of sub-TeV gamma rays detected by the \textit{Fermi}-Large Area Telescope (LAT) from the \textit{Fermi} Bubbles (FBs) at the Galactic center is still uncertain. In a hadronic model, acceleration of protons and/or nuclei and their…

High Energy Astrophysical Phenomena · Physics 2019-04-17 Lili Yang , Soebur Razzaque

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 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

The Fermi bubbles are structures observed in gamma rays at GeV energies, emanating from the central region of our galaxy and extending up to 8.5 kpc above and below the galactic plane. While initial studies showed a flat brightness across…

High Energy Astrophysical Phenomena · Physics 2021-08-02 Pooja Surajbali

The Fermi Bubbles were discovered about a decade ago in the {\it Fermi}-LAT data as a double-lobe structure extending up to 55 deg. in Galactic latitudes above and below the Galactic Center. At the moment their origin is still unknown. The…

High Energy Astrophysical Phenomena · Physics 2021-08-25 E. Moulin , A. Montanari , D. Malyshev , Dm. Malyshev

The Fermi Bubbles (FB) are a pair of large-scale ellipsoidal structures extending above and below the Galactic plane almost symmetrically aligned with the Galactic Center. After more than 10 years since their discovery, their nature and…

High Energy Astrophysical Phenomena · Physics 2022-03-23 Michela Negro , Henrike Fleischhack , Andreas Zoglauer , Seth Digel , Marco Ajello

Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin of the Fermi…

High Energy Astrophysical Phenomena · Physics 2016-10-19 ANTARES Collaboration , S. Adrián-Martínez , A. Albert , I. Al Samarai , M. André , G. Anton , S. Anvar , M. Ardid , T. Astraatmadja , J-J. Aubert , B. Baret , J. Barrios-Martí , S. Basa , V. Bertin , S. Biagi , C. Bigongiari , C. Bogazzi , B. Bouhou , M. C. Bouwhuis , J. Brunner , J. Busto , A. Capone , L. Caramete , C. Cârloganu , J. Carr , S. Cecchini , Z. Charif , Ph. Charvis , T. Chiarusi , M. Circella , F. Classen , R. Coniglione , L. Core , H. Costantini , P. Coyle , A. Creusot , C. Curtil , G. De Bonis , I. Dekeyser , A. Deschamps , C. Donzaud , D. Dornic , Q. Dorosti , D. Drouhin , A. Dumas , T. Eberl , U. Emanuele , A. Enzenhöfer , J-P. Ernenwein , S. Escoffier , K. Fehn , P. Fermani , V. Flaminio , F. Folger , U. Fritsch , L. A. Fusco , S. Galatà , P. Gay , S. Geißelsöder , K. Geyer , G. Giacomelli , V. Giordano , A. Gleixner , J. P. Gómez-González , K. Graf , G. Guillard , H. van Haren , A. J. Heijboer , Y. Hello , J. J. Hernández-Rey , B. Herold , J. Hößl , C. Hugon , C. W. James , M. de Jong , M. Kadler , O. Kalekin , A. Kappes , U. Katz , P. Kooijman , A. Kouchner , I. Kreykenbohm , V. Kulikovskiy , R. Lahmann , E. Lambard , G. Lambard , G. Larosa , D. Lattuada , D. Lefèvre , E. Leonora , D. Lo Presti , H. Loehner , S. Loucatos , F. Louis , S. Mangano , M. Marcelin , A. Margiotta , J. A. Martínez-Mora , S. Martini , T. Michael , T. Montaruli , M. Morganti , C. Müller , M. Neff , E. Nezri , D. Palioselitis , G. E. Păvălaş , C. Perrina , V. Popa , T. Pradier , C. Racca , G. Riccobene , R. Richter , C. Rivière , A. Robert , K. Roensch , A. Rostovtsev , D. F. E. Samtleben , M. Sanguineti , P. Sapienza , J. Schmid , J. Schnabel , S. Schulte , F. Schüssler , T. Seitz , R. Shanidze , C. Sieger , F. Simeone , A. Spies , M. Spurio , J. J. M. Steijger , Th. Stolarczyk , A. Sánchez-Losa , M. Taiuti , C. Tamburini , Y. Tayalati , A. Trovato , B. Vallage , C. Vallée , V. Van Elewyck , M. Vecchi , P. Vernin , E. Visser , S. Wagner , J. Wilms , E. de Wolf , K. Yatkin , H. Yepes , J. D. Zornoza , J. Zúñiga

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 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

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

We study the spatial correlation of astrophysical neutrinos detected by IceCube with the geometry of the two large globular structures located in the center of our Galaxy, known as Fermi Bubbles (FB). Using the Fermi-LAT data collected…

High Energy Astrophysical Phenomena · Physics 2019-08-16 Paola Alvarez-Hurtado , Nissim Fraija , Antonio Galvan , Antonio Marinelli

Two enigmatic gamma-ray features in the Galactic central region, known as Fermi Bubbles (FBs), were found from Fermi-LAT data. An energy release (e.g., by tidal disruption events in the Galactic center, GC), generates a cavity with a shock…

High Energy Astrophysical Phenomena · Physics 2024-11-25 Vladimir A. Dogiel , Chung-Ming Ko

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 are giant Galactic structures observed in both gamma-rays and microwaves. Recent studies have found support for the hypothesis that the gamma-ray and microwave emission can both be understood as arising from a hard…

High Energy Astrophysical Phenomena · Physics 2017-05-03 Sruthi A. Narayanan , Tracy R. Slatyer

Gamma-ray Bursts (GRB) were discovered by satellite-based detectors as powerful sources of transient $\gamma$-ray emission. The Fermi satellite detected an increasing number of these events with its dedicated Gamma-ray Burst Monitor (GBM),…

Instrumentation and Methods for Astrophysics · Physics 2021-09-29 G. La Mura , U. Barres de Almeida , R. Conceição , A. De Angelis , F. Longo , M. Pimenta , E. Prandini , E. Ruiz-Velasco , B. Tomé

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

Gamma rays at rest frame energies as high as 90 GeV have been reported from gamma-ray bursts (GRBs) by the Fermi Large Area Telescope (LAT). There is considerable hope that a confirmed GRB detection will be possible with the upcoming…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Rudy C. Gilmore , Aurelien Bouvier , Valerie Connaughton , Adam Goldstein , Nepomuk Otte , Joel R. Primack , David A. Williams

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

The Fermi Bubbles have been imaged in sub-TeV gamma rays at Fermi-LAT, and, if their origin is hadronic, they might have been seen with low statistics in $\sim 0.1- 1$ PeV neutrinos at IceCube. We discuss the detectability of these objects…

High Energy Astrophysical Phenomena · Physics 2015-07-22 Cecilia Lunardini , Soebur Razzaque , Lili Yang

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
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