Acceleration and transport of relativistic electrons in the jets of the microquasar SS 433
Science American Association for the Advancement of Science 383:6681 (2024) 402-406
Abstract:
SS 433 is a microquasar, a stellar binary system that launches collimated relativistic jets. We observed SS 433 in gamma rays using the High Energy Stereoscopic System (H.E.S.S.) and found an energy-dependent shift in the apparent position of the gamma-ray emission from the parsec-scale jets. These observations trace the energetic electron population and indicate that inverse Compton scattering is the emission mechanism of the gamma rays. Our modeling of the energy-dependent gamma-ray morphology constrains the location of particle acceleration and requires an abrupt deceleration of the jet flow. We infer the presence of shocks on either side of the binary system, at distances of 25 to 30 parsecs, and that self-collimation of the precessing jets forms the shocks, which then efficiently accelerate electrons.Multiwavelength Observations of the Blazar PKS 0735+178 in Spatial and Temporal Coincidence with an Astrophysical Neutrino Candidate IceCube-211208A
The Astrophysical Journal American Astronomical Society 954:1 (2023) 70
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The Astrophysical Journal Letters American Astronomical Society 952:2 (2023) l38
Constraining the cosmic-ray pressure in the inner Virgo Cluster using H.E.S.S. observations of M 87
Astronomy & Astrophysics EDP Sciences 675 (2023) a138
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The Astrophysical Journal Letters American Astronomical Society 950:2 (2023) l16