Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 15: Cosmic Rays I

T 15.1: Vortrag

Montag, 31. März 2025, 16:45–17:00, VG 3.102

Beamforming with the SKA-Low array for detection of gamma rays at PeV energies. — •Subhadip Saha^1,2 and Tim Huege¹ for the SKA High-Energy Cosmic Particles Science Working Group collaboration — ¹Institute for Astroparticle Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany — ²Indian Institute of Technology Kanpur, Kanpur, India.

SKA-Low (Square Kilometer Array) is globally recognized as the next-generation radio-astronomical observatory at frequencies below 350 MHz. We are focusing on its dense core region and aim to perform beamforming with thousands of antennas to detect the radio emission from particle showers initiated by cosmic or gamma rays in the atmosphere. Beamforming is expected to lower the radio-detection threshold for air showers considerably. With thousands of these antennas, the beamforming approach has significant potential to lower the detection threshold down to as low as 1 PeV. The strength of the beamformed signal can be scaled with the number of antennas and energy to estimate the number of antennas required to detect these low-energetic energetic air showers. We are investigating how far the detection threshold can essentially be brought down with the beamforming application and if the detection of PeV gamma rays would be possible.

Keywords: SKA; Beamforming; PeV gamma rays; Cosmic rays; Radio detection