Work

Exploring the Galactic Plane: A Comparative Study of Fermi-LAT Sources and HESS's Non-Detection at TeV Energies

Year: 2025

Type: conference-paper

Abstract: The HESS Galactic Plane Survey (HGPS), published in 2018, presented a decade of very-high- energy (VHE) gamma-ray observations along the Galactic plane. This study was accompanied by the release of several maps in FITS format, offering a detailed view of the region. The flux upper-limits from these HGPS maps can be compared to the high-energy (HE) spectra of sources catalogued by the Fermi-LAT in the same region. For some sources, extrapolating the Fermi-LAT flux into the VHE range predicts flux values exceeding the upper-limits set by HESS. In this work, we present the results of this comparison and highlight the sources that are of particular interest for future VHE observations.

Source: International Cosmic Ray Conference

DOI: 10.22323/1.501.0584

Authors: Francois Brun, Baptiste Le Nagat-Neher, Marianne Lemoine-Goumard, Marie-Hélène Grondin, Paul Fauverge

Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay, Université de Bordeaux, Laboratoire de Physique des deux infinis Bordeaux

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4414435675

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