Speaker
Description
Microquasars are powerful cosmic particle accelerators within our galaxy, known for emitting gamma rays at energies beyond the multi-teraelectronvolt (TeV) range. Whether they can accelerate particles to PeV energies and qualify as PeVatrons remains an open question, with SS 433 being the only confirmed TeV-emitting microquasar. The High-Altitude Water Cherenkov (HAWC) Observatory has first detected ultra-high-energy (UHE) gamma rays from another microquasar, V4641 Sagittarii (V4641 Sgr), revealing previously unknown particle acceleration processes. Known for its rapid outbursts and relativistic jets, V4641 Sgr provides a key laboratory to study particle acceleration, jet formation, and black hole accretion. The detection of UHE gamma-ray emission by HAWC offers valuable insights into the extreme environment near the black hole, supporting theories of jet-driven particle acceleration and highlighting the complex interactions between the jets and surrounding matter. These findings not only enhance our understanding of microquasars but also shed light on their role in cosmic-ray production and accelerations, providing a fresh perspective on high-energy astrophysical processes.
| Collaboration(s) | HAWC |
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