SEMINÁRIO DO DEPARTAMENTO DE ASTRONOMIA
Microquasar remnants
a talk by Gustavo E. Romero (Instituto Argentino de Radioastronomía IAR/Argentina) - In-Person
Abstract:
Microquasars—accreting X-ray binaries with powerful relativistic jets—can strongly perturb the interstellar medium, inflating cavities that are filled with particles accelerated to high energies at jet termination shocks. Once the central engine ceases, a long-lived remnant persists, which can continue to act as a cosmic-ray source. The efficiency of particle confinement and escape in these remnants is governed by diffusion, critically depending on the magnetic turbulence within the cavity and its surroundings. In this talk, I will outline the basic properties of such microquasar remnants and assess their potential as counterparts for very-high-energy gamma-ray sources recently detected by the LHAASO observatory. I will argue that these systems are compelling candidates for Galactic PeVatrons.
Short-Bio:
Gustavo E. Romero is Full Professor of Relativistic Astrophysics at the University of La Plata, Director of the Argentine Institute of Radio Astronomy, and Superior Researcher at the National Scientific and Technical Research Council of Argentina (CONICET). He is a former president of the Argentine Astronomical Society and has published over 500 papers on astrophysics, gravitation, cosmology, and the foundations of physics. He has authored or edited thirteen books, including Introducción a la Astrofísica Relativista (with J.M. Paredes, Editorial de la Universidad de Barcelona, 2010), Introduction to Black Hole Astrophysics (with G. Vila, Springer, 2014), Scientific Philosophy (Springer, 2018) and Contemporary Materialism: Its Ontology and Epistemology (with J. Pérez-Jara and L. Camprubí, Springer, 2022). Dr. Romero has supervised more than 40 PhD and Master Thesis. His current primary interests include high-energy astrophysics, black hole physics, space technology, and the scientific philosophy.
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live