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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

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 are gigantic gamma-ray structures in our Galaxy. The physical origin of the bubbles is still under debate. The leading scenarios can be divided into two categories. One is the nuclear star forming activity similar to…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Yoshiyuki Inoue , Shinya Nakashima , Masaya Tahara , Jun Kataoka , Tomonori Totani , Yutaka Fujita , Yoshiaki Sofue

The origin of the Fermi bubbles recently detected by the Fermi Gamma-ray Space Telescope in the inner Galaxy is mysterious. In the companion paper Guo & Mathews (Paper I), we use hydrodynamic simulations to show that they could be produced…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Fulai Guo , William G. Mathews , Gregory Dobler , S. Peng Oh

The Fermi bubbles are two giant bubbles in gamma rays lying above and below the Galactic center (GC). Despite numerous studies on the bubbles, their origin and emission mechanism remain elusive. Here we use a suite of hydrodynamic…

High Energy Astrophysical Phenomena · Physics 2020-05-20 Ruiyu Zhang , Fulai Guo

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

High Energy Astrophysical Phenomena · Physics 2015-05-27 Fulai Guo , William G. Mathews

The Fermi Bubbles are two giant gamma-ray emitting lobes extending 55$^{\circ}$ above and below the Galactic Center. While the Northern Bubble has been extensively studied in ultraviolet (UV) absorption, little is known about the gas…

The Galactic Center is surrounded by two giant plasma lobes known as the Fermi Bubbles, extending ~10 kpc both above and below the Galactic plane. Spectroscopic observations of Fermi Bubble directions at radio, ultraviolet, and optical…

The quest for Dark Matter signals in the gamma-ray sky is one of the most intriguing and exciting challenges in astrophysics. In this paper we perform the analysis of the energy spectrum of the \textit{Fermi bubbles} at different latitudes,…

High Energy Physics - Phenomenology · Physics 2013-12-31 Wei-Chih Huang , Alfredo Urbano , Wei Xue

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

Fermi LAT has discovered two extended gamma-ray bubbles above and below the galactic plane. We propose that their origin is due to the energy release in the Galactic center (GC) as a result of quasi-periodic star accretion onto the central…

Astrophysics of Galaxies · Physics 2011-09-14 D. O. Chernyshov , K. -S. Cheng , V. A. Dogiel , C. M. Ko , W. -H. Ip , Y. Wang

The {\it Fermi} Large Area Telescope has recently discovered two giant gamma-ray bubbles which extend north and south of the Galactic center with diameters and heights of the order of $H\sim 10$ kpc. We suggest that the periodic star…

High Energy Astrophysical Phenomena · Physics 2015-06-03 K. S. Cheng , D. O. Chernyshov , V. A. Dogiel , C. M. Ko , W. H. Ip , Y. Wang

Fermi has discovered two giant gamma-ray-emitting bubbles that extend nearly 10 kpc in diameter. We propose that periodic star capture processes by the galactic supermassive black hole, Sgr A*, with a capture rate $<10^{-5}$ yr$^{-1}$ and…

High Energy Astrophysical Phenomena · Physics 2011-09-29 V. A. Dogiel , D. O. Chernyshov , K. -S. Cheng , Y. Wang , C. -M. Ko , W. -H. Ip

One of the leading explanations for the origin of Fermi Bubbles is a past jet activity in the Galactic center supermassive black hole Sgr A$^*$. The claimed jets are often assumed to be perpendicular to the Galactic plane. Motivated by the…

High Energy Astrophysical Phenomena · Physics 2023-07-12 Kartick C. Sarkar , Santanu Mondal , Prateek Sharma , Tsvi Piran

The newly launched X-ray satellite, eRosita, has recently revealed two gigantic bubbles extending to ~80 degrees above and below the Galactic center. The morphology of these "eRosita bubbles" bears a remarkable resemblance to the Fermi…

High Energy Astrophysical Phenomena · Physics 2022-03-08 H. -Y. Karen Yang , M. Ruszkowski , E. Zweibel

Enabled by the Fermi Large Area Telescope, we now know young and recycled pulsars fill the gamma-ray sky, and we are beginning to understand their emission mechanism and their distribution throughout the Galaxy. However, key questions…

The Fermi and eROSITA bubbles are giant gamma-ray and X-ray lobes in the Milky Way, extending up to $\sim$50{\deg} and ~$\sim$80{\deg} in galactic latitude, respectively, yet their origins remain debated. Using three-dimensional…

High Energy Astrophysical Phenomena · Physics 2026-03-03 Ruiyu Zhang , Fulai Guo , Shaokun Xie , Ruofei Zhang , Shumin Wang , Guobin Mou , Xiaodong Duan

Evidence has increasingly mounted in recent decades that outflows of matter and energy from the central parsecs of our Galaxy have shaped the observed structure of the Milky Way on a variety of larger scales. On scales of ~15 pc, the…

High Energy Astrophysical Phenomena · Physics 2019-04-15 G. Ponti , F. Hofmann , E. Churazov , M. R. Morris , F. Haberl , K. Nandra , R. Terrier , M. Clavel , A. Goldwurm

The Fermi-LAT data revealed giant bubbles of emission above and below the Galactic plane with an energy spectrum significantly harder than seen from other directions. How the bubbles connect to the Galactic plane is unclear. We find that…

High Energy Astrophysical Phenomena · Physics 2015-09-18 Wim de Boer , Iris Gebauer , Simon Kunz , Alexander Neumann

Gamma-ray data from Fermi-LAT show a bi-lobular structure extending up to 50 degrees above and below the Galactic centre, coincident with a possibly related structure in the ROSAT X-ray map which presumably originated in some energy release…

High Energy Astrophysical Phenomena · Physics 2022-08-04 Philipp Mertsch , Subir Sarkar