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Search for Axionlike-Particle-Induced Prompt γ -Ray Emission from Extragalactic Core-Collapse Supernovae with the Fermi Large Area Telescope
Manuel Meyer, Tanja Petrushevska, 2020, izvirni znanstveni članek

Opis: During a core-collapse supernova (SN), axionlike particles (ALPs) could be produced through the Primakoff process and subsequently convert into γ rays in the magnetic field of the Milky Way. We do not find evidence for such a γ-ray burst in observations of extragalactic SNe with the Fermi Large Area Telescope (LAT). The SN explosion times are estimated from optical light curves and we find a probability of about ∼90% that the LAT observed at least one SN at the time of the core collapse. Under the assumption that at least one SN was contained within the LAT field of view, we exclude photon-ALP couplings ≳2.6×10−12 GeV−1 for ALP masses ma≲3×10−10 eV, improving previous limits from SN1987A by a factor of 2.
Najdeno v: osebi
Ključne besede: darn matter, axions, axion-like particles, core-collapse supernovae
Objavljeno: 15.06.2020; Ogledov: 991; Prenosov: 38
.pdf Polno besedilo (30,47 MB)

Extending the sample of core-collapse supernovae forsearches of axion-like-particle induced gamma-ray burstswith the Fermi LAT
Manuel Meyer, Tanja Petrushevska, 2021, objavljeni znanstveni prispevek na konferenci

Najdeno v: osebi
Ključne besede: dark matter, axions, supernovae
Objavljeno: 06.07.2021; Ogledov: 351; Prenosov: 0
.pdf Polno besedilo (2,32 MB)

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