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TAPIR Seminar

Friday, May 21, 2021
2:00pm to 3:00pm
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Online Event
Synchrotron Boilers in Embryonic Neutron-Star Wind Nebulae
Kazumi Kashiyama, Assistant Professor, School of Science, University of Tokyo,

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https://caltech.zoom.us/j/92271559087?pwd=TFQ2YVk2N0FpSzhlR3JvZlFENTUyQT09

The rotation and magnetic energy of embryonic neutron stars are a promising energy source of energetic transients including gamma-ray bursts, hypernovae, super-luminous supernovae (SLSNe), and fast radio bursts (FRBs). In general, these energies are extracted by a relativistic wind, shocking into the surrounding ejecta to form a wind nebula, which can be a smoking gun of the neutron-star central engines. Here we focus on the radio and submm emission from such a wind nebula with an age less than ∼ 100 year. We calculate how the emission spectrum evolve with time depending on the history of injection, heating, and cooling of the parent electrons/positrons in the nebula. In particular, we clarify the importance of the synchrotron self-absorption heating or the so-called synchrotron boiler mechanism. We apply the model to the radio counterparts of e.g., SLSN PTF10hgi and FRB 121102, and discuss the implications.

For more information, please contact JoAnn Boyd by email at [email protected].