Prospects on detection of the Fermi Bubbles with the Cherenkov Telescope Array Observatory

Xotta F, Bavdaž N, Eckner C, Malyshev D, Pérez-Romero J, Zaharijaš G (2025)

Publication Type: Conference contribution

Publication year: 2025

Journal

PoS - Proceedings of Science SISSA

Publisher: Sissa Medialab Srl

Book Volume: 514

Conference Proceedings Title: Proceedings of Science

Event location: Johannesburg ZA

DOI: 10.22323/1.514.0052

Abstract

In 2010, the Fermi Gamma-ray Space Telescope observed two gamma-ray emitting structures, the Fermi Bubbles (FBs), which extend up to 55° above and below the Galactic plane and that seem to emanate from the Galactic center region. Although the spectrum at latitudes |b| > 10◦ has a softening or a cutoff around 100 GeV, the one at the base of the FBs, |b| < 10◦, extends up to ∼ 1 TeV without a significant cutoff in the Fermi-LAT data. The mechanism behind the FBs production is currently under debate. More observations of the FBs at different energies are required to improve our understanding of their origin. Recently, H.E.S.S. and HAWC observatory have set upper limits on the FBs. In this work, we assess the sensitivity of the Cherenkov Telescope Array Observatory (CTAO) using the "Alpha configuration" in the South site to detect the FBs and investigate the optimal strategies for their detection at low latitudes. We simulate the observations using the official CTAO science tool gammapy, considering several benchmark models for the FBs and the interstellar emission and test different observational strategies taking advantage of the proposed CTAO consortium surveys. We use these simulations to estimate the CTAO sensitivity to the FBs.

Authors with CRIS profile

Dmitry Malyshev Lehrstuhl für Physik

Involved external institutions

University of Nova Gorica / Univerza v Novi Gorici SI Slovenia (SI)

How to cite

APA:

Xotta, F., Bavdaž, N., Eckner, C., Malyshev, D., Pérez-Romero, J., & Zaharijaš, G. (2025). Prospects on detection of the Fermi Bubbles with the Cherenkov Telescope Array Observatory. In Proceedings of Science. Johannesburg, ZA: Sissa Medialab Srl.

MLA:

Xotta, F., et al. "Prospects on detection of the Fermi Bubbles with the Cherenkov Telescope Array Observatory." Proceedings of the 2025 High Energy Astrophysics in Southern Africa, HEASA 2025, Johannesburg Sissa Medialab Srl, 2025.

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