Galactic Center Observations with CTAO LST-1

Galactic Center Observations with CTAO LST-1

Blog Article

Very-high-energy gamma-ray observations of the central part of the Milky Way Galaxy allow for morphological study of cosmic-ray propagation around the supermassive black hole Sgr A*.An interpretation of the diffuse gamma-ray component, which spans a few hundred parsecs in longitude, is the PeVatron scenario: the spectral energy distribution follows a power law up to a few tens of TeV, with a spatial distribution that is aligned with the central molecular zone and accelerated cosmic rays that propagate in the vicinity here of Sgr A*.Nevertheless, differences in the findings of earlier studies persist among current-generation telescopes, each offering different interpretations based on different analytical approaches.The MAGIC telescopes for example presented a hint of a presence of a spectral turnover at around 20 TeV, possibly in tension with the PeVatron scenario.

We analyzed Galactic Center data taken by the Large-Sized Telescope prototype (LST-1) for the Cherenkov Telescope Array Observatory (CTAO), the next-generation project of a ground-based gammaray observatory currently under commissioning.Despite the limited sensitivity due to the current monoscopic observation, the relatively wide synovex one grass field of view and the large-zenith-angle observation technique allow LST-1 to study the diffuse emission in the TeV range.In this contribution, we will report the current status of studies of the Galactic Center diffuse emission by including our results from LST-1 observations.