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SUMMARY:January 2026 WG3 meeting
DTSTART:20260225T160000Z
DTEND:20260225T170000Z
DTSTAMP:20260427T180000Z
UID:indico-event-51130@agenda.infn.it
DESCRIPTION:Speakers: Maurizio Giannotti\n\nFrancesca Lecce will present t
 he talk: Detecting light axions from supernovae in  nearby galaxies\nAbs
 tract: Axion-like particles (ALPs) coupled to nucleons can be efficiently 
 produced in core-collapse supernovae (SNe). If they also couple to photons
 \, they can convert into gamma rays in cosmic magnetic fields\, generating
  short gamma-ray bursts. While ALPs from a Galactic SN would produce an in
 tense and easily detectable gamma-ray signal\, such events are extremely r
 are. In contrast\, a few SNe per year are expected in nearby galaxies with
 in distances of order 10 Mpc\, where strong magnetic fields can allow more
  efficient ALP–photon conversions than in the Milky Way\, making these s
 ystems promising extragalactic targets.This motivates full-sky gamma-ray m
 onitoring\, ideally combined with decihertz gravitational-wave detectors t
 o enable time-triggered searches from nearby galaxies. We show that\, unde
 r realistic conditions\, a decade of observations could reach sensitivitie
 s to the ALP–photon coupling g_agamma greater than approximately 1e-16 G
 eV⁻¹ for ALP masses below about 1e-9 eV\, assuming an ALP–nucleon cou
 pling close to the SN 1987A cooling bound. This sensitivity would allow on
 e to probe a large\, currently unexplored region of parameter space below 
 the longstanding SN 1987A bound.\n\nhttps://agenda.infn.it/event/51130/
URL:https://agenda.infn.it/event/51130/
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