Résumé / Abstract Seminaire_IAP
« Highlights of the Radio Study of the Galactic Center Magnetized Filaments »

Farhad Yusef-Zadeh
Dept. Astronomy Astroph., Northwestern Univ. (Evanston, Illinois, Etats-Unis d'Amérique)

It has been 40 years since the magnetized radio filaments were first reported toward the Galactic center (GC), the first hint of an energetic activity in this region. Since then, a large number of synchrotron emitting filaments has been discovered. In particular, the recent MeerKAT survey, which has been a gold mine in the study of the extreme environment of the GC, has increased the number of filaments by an order of magnitude.

In this talk, I will discuss the statistical properties of the GC filaments, the comparison of the intracluster medium (ICM) and GC filaments, models of these enigmatic objects and the association of a milli-second pulsar with a nonthermal GC filament. I will alos present nonthermal continuum emission from the prominent molecular cloud Sgr B and model the interaction of the cosmic-ray electrons incident on the cold and dense cloud. Lastly, I will suggest that the origin of the high ionization rate may result from depletion of cosmic-ray particles from nonthermal radio filaments.
Friday 16 May 2025 - 11:00
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage