Speaker
Description
The purpose of this study is to investigate the association between high-energy neutrino events detected by IceCube and soft X-ray transients powered by failed or choked relativistic jets. Assuming photomeson interactions as the primary mechanism for neutrino production, such transients are promising candidates for high-energy neutrino emission. The photomeson resonance condition implies that PeV-scale cosmic rays predominantly interact with keV photons, making X-ray observations particularly relevant for identifying neutrino sources. This energy range is well covered by the Monitor of All-sky X-ray Image (MAXI) aboard the International Space Station.
In this talk, we present a multi-messenger search for associations between IceCube neutrino events and soft X-ray transients using more than 14 years of overlapping IceCube and MAXI observations. The long-term overlap between IceCube and MAXI provides a unique opportunity to test neutrino source scenarios based on photomeson interactions using soft X-ray transients as observational probes. By searching for soft X-ray transients associated with IceCube neutrino events, we explore their role as candidate high-energy neutrino sources and investigate the constraints that such observations can place on neutrino–UHECR unified source models, particularly in terms of the cosmic-ray loading factor.
