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SUMMARY:IAP - High-Energy Universe Group Seminar -- SS2026 (Nora Valtonen-
 Mattila -- Next Galactic Supernova)
DTSTART:20260716T090000Z
DTEND:20260716T103000Z
DTSTAMP:20260727T183800Z
UID:indico-event-5610@indico.kit.edu
DESCRIPTION:SS 2026\nNora Valtonen-Mattila\nRU Bochum\n"The Next Galactic 
 Supernova: A Multi-Messenger Window into Stellar Collapse and New Physics"
 \nabstract: \nWhen the next star in our Galaxy collapses\, it will releas
 e a wide array of messengers: a burst of MeV neutrinos carrying away most 
 of the star's gravitational binding energy\, gravitational waves\, electro
 magnetic emission across the spectrum\, and possibly high-energy neutrinos
  from jets or shock interactions\, together with the potential to probe ph
 ysics beyond the Standard Model. Because most of the explosion's energy is
  carried by MeV neutrinos\, they provide our most direct probe of the coll
 apse itself. Even the few dozen neutrinos detected from SN 1987A significa
 ntly advanced our understanding of stellar collapse. With current detector
 s\, a Galactic event would yield orders of magnitude more data\, enabling 
 considerably deeper physics studies. Since the MeV neutrino burst emerges 
 before any electromagnetic signal\, it will provide the earliest possible 
 alert\, enabling rapid localization and allowing the astronomy community t
 o observe electromagnetic signatures during stages that would otherwise re
 main inaccessible.In this talk\, I will discuss how this neutrino signal c
 an be detected and interpreted\, with a focus on IceCube and the fast-aler
 t infrastructure of the Supernova Early Warning System (SNEWS)\, which coo
 rdinates detectors worldwide to provide the earliest possible community-wi
 de alert. I will highlight what can be learned from neutrinos alone\, as w
 ell as the additional insights gained by combining neutrinos\, photons\, a
 nd gravitational waves\, including constraints on the explosion mechanism 
 and\, more broadly\, the physics of the collapsing core. I will also discu
 ss how a Galactic supernova offers a unique opportunity for direct searche
 s for new physics\, focusing on axion-like particles that couple to matter
  as a case study.\n \n \n \n \n \n \n\nhttps://indico.kit.edu/event/
 5610/
LOCATION:206 (KIT CN Bld 425)
URL:https://indico.kit.edu/event/5610/
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