Modeling Synchrotron Polarization in Moving Massive Stars
Maria Victoria del Valle
IAG/USP, BR
Runaway stars move through the interstellar medium with V > 30 km/s. When the star has powerful winds the interaction with the interstellar material produces a system of shocks. The outer shock, called the bow shock, propagates through the ambient medium cooling efficiently and compressing the gas. Bow shocks of massive runaway stars were detected at radio wavelengths with a high level of non-thermal emission, most probably produced by the synchrotron mechanism. This emission is produced by relativistic particles interacting with a local magnetic field, this population of particles can further radiate at higher frequencies. Synchrotron radiation is intrinsically highly polarized. In this talk I will present a model of the bow shock structure of massive runaway stars, aiming to produce synthetic radio emission and polarization maps. I will discuss the implications of the results on particle acceleration and non-thermal emission production and detection.
Maria Victoria del Valle graduated in Astronomy from La Plata National University, in Argentina, where she also obtained her PhD degree. During her PhD she was a TWAS/CNPq sandwich fellow at IAG/USP. She was a CONICET postdoc fellow at the Instituto Argentino de Radioastronomia and an Alexander von Humboldt postdoc fellow at Potsdam University. Currently, Dr. del Valle is a FAPESP Young Researcher at the IAG/USP. Her research is focused in modeling high-energy processes in Galactic sources.
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live