[Triumf-seminars] TRIUMF Particle Phys/SciTec Seminar today at 12:00

[TRIUMF Seminars]

Date/Time: Fri 2023-06-16 at 12:00

Location:  Conference Room/Zoom

Speaker:   Dr. Hans Niederhausen (Michigan State University)

Title:     Evidence for neutrino emission from the nearby active galaxy NGC 1068: From photoelectrons to supermassive blackholes?

Abstract: The IceCube Neutrino Observatory, deployed beneath the South Pole, is the largest optical neutrino telescope in the World. IceCube has been measuring a diffuse flux of high-energy (TeV and above) astrophysical neutrinos for almost a decade. The sources of the vast majority of these neutrinos remain elusive, but studies indicate that gamma-ray obscured sources may at least in parts be responsible. Most recently, IceCube reported strong evidence for TeV neutrino emission from NGC 1068, a well-known and nearby active galaxy. I will explain how IceCube searches for neutrinos from astrophysical sources and how recent improvements in our analysis methods enabled this result. When put into the multi-messenger context, in particular the non-detection of TeV gamma-rays by the MAGIC telescopes, this measurement suggests that the gamma-ray obscured vicinity of the central supermassive black hole acts as a cosmic hadron accelerator. The next steps are clear. By studying similar objects we may finally identify a class of sources that makes a sizeable contribution to the diffuse flux of astrophysical neutrinos.
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Remote Connection
https://ubc.zoom.us/j/63212009121?pwd=TWhVK2ZDdkxoaFArOEkxTENJVzJwZz09
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Meeting ID: 632 1200 9121
Passcode: 325450
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