8–10 Oct 2025
Nevis Labs, Columbia University
America/New_York timezone

Microquasars as PeV accelerators: the mounting observational evidence from very-high-energy gamma-ray observations.

9 Oct 2025, 09:00
30m
Nevis Labs, Columbia University

Nevis Labs, Columbia University

Plenary General Microquasars

Speakers

Laura Olivera Nieto Laura Olivera-Nieto (Anton Pannekoek Institute for Astronomy, University of Amsterdam)

Description

X-ray binary systems exhibiting jets (microquasars) have emerged as promising candidates to explain the observed cosmic-ray flux in the PeV energy range. A handful of microquasars are now known to emit multi-TeV radiation, implying in-situ acceleration of >100 TeV particles. In my talk, I will go over the existing very-high-energy (VHE) gamma-ray observations of these systems, with a focus on observations made using pointing instruments. In particular, I will discuss the results of the recent H.E.S.S. observation campaign of V4641 Sgr, which stands out as the brightest and most extreme source in its class to date. Finally, I will outline what to expect from future observations of the population from both current and future gamma-ray facilities.

Presentation materials