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HESS - Abteilung Hofmann
Abstract:
The Large Magellanic Cloud, a satellite galaxy of the Milky Way, has been observed with the
High Energy Stereoscopic System (H.E.S.S.) above an energy of 100 billion electron volts
for a deep exposure of 210 hours. Three sources of different types were detected: the
pulsar wind nebula of the most energetic pulsar known, N 157B; the radio-loud supernova
remnant N 132D; and the largest nonthermal x-ray shell, the superbubble 30 Dor C. The
unique object SN 1987A is, unexpectedly, not detected, which constrains the theoretical
framework of particle acceleration in very young supernova remnants. These detections
reveal the most energetic tip of a g-ray source population in an external galaxy and provide
via 30 Dor C the unambiguous detection of g-ray emission from a superbubble.