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Ariel Goobar

As seen in: Nature, Physical Review B, HAL
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Articles

SN Zwicky: uncovering a population of gravitational lens galaxies with magnified "standard candles"

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By Ariel Goobar, Joel Johansson, Steve Schulze, Nikki Arendse
| HAL
SN Zwicky: uncovering a population of gravitational lens galaxies with magnified "standard candles" Domaines Origine Fichiers éditeurs autorisés sur une archive ouverte Licence
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White Dwarfs in Dwarf Spheroidal Galaxies: A New Class of Compact-Dark-Matter Detectors

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By Juri Smirnov, Ariel Goobar, Tim Linden Verified, Edvard Mörtsell
| Physical Review B
Recent surveys have discovered a population of faint supernovae, known as Ca-rich gap transients, inferred to originate from explosive ignitions of white dwarfs. In addition to their unique spectra and luminosities, these supernovae have an unusual spatial distribution and are predominantly found at large distances from their presumed host galaxies.
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Constraining MeV-scale axionlike particles with Fermi-LAT observations of SN 2023ixf

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By Pierluca Carenza, Ariel Goobar, Eike Ravensburg, Christopher Eckner
| Physical Review B
The Fermi-LAT observations of SN 2023ixf, a type II supernova in the nearby Pinwheel Galaxy, Messier 101 (M101), presents us with an excellent opportunity to constrain MeV-scale axionlike particles (ALPs). By examining the photon decay signature from heavy ALPs that could be produced in the explosion, the existing constraints on the ALP-photon coupling can be improved, under optimistic assumptions, by up to a factor of ∼2 for masses ma≲3  MeV.
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