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Surprisingly bright very-high energy emission from the Central Molecular Zone (CMZ) has been detected by the H.E.S.S. telescope. The size of this central part of our galaxy is ~100s of parsecs, and it is filled with very dense and turbulent gas. The total gas mass can be estimated via CO molecular line emission and dust emission between 70 and 500 micrometers. The three dimensional mass estimate of the molecular clouds in the CMZ is crutial for understanding the emitted gammarays in the context of hadronic interactions of the cosmic-rays with the ambient matter. Furthermore, the future Southern-hemisphere Gamma-ray observatory will be sensible to the highest energies emitted from the Galactic Center, which will better constrain the physics of the particle acceleration for this very unique region of our galaxy.
Helena X. Ren received her Bachelor in Physics, specialized in Theoretical Physics at the University of Barcelona. Later she continued her career at the same university, focusing on nonthermal very-high-energy astrophysics, and gained more expertise in the subject of quasi-periodic oscillations in the gamma-ray emission of AGN. Since September 2021 she is PhD student at the Max Planck Institute for Nuclear Physics in Heidelberg, and working on Very-High-Energy and Ultra-High-Energy from the Galactic Centre.