Ponente
Descripción
X-ray binaries (XRBs) are binary system with an accreting compact object. They have long been suggested to be possible galactic cosmic ray accelerators. In such models, the protons accelerated by the accretion process at the compact object could carry out $pp$ or $p\gamma$ interactions in the accretion disk, in the atmosphere of the companion star, or in the stellar wind. High energy neutrinos may be produced from these interactions and will serve as a smoking-gun evidence for CR acceleration. Furthermore, many models predicted their neutrino emission to be modulated by the orbital periods. In this talk, I will present the result of the latest search for periodic neutrino emission from X-ray binaries performed by IceCube Neutrino Observatory. Using 7.5 years of IceCube's muon track data, this search featured an improved unbinned maximum likelihood ratio method, and was performed on a catalogue of 55 XRBs with declination $\geq -5^o$, greatly expanded over the previous periodic point-source searches. This study found no evidence for neutrino emission, but have placed upper limits on the neutrino flux from each XRB. Comparisons between the results and some phenomenological models, and predictions for observations by IceCube Gen2 will also be presented.
