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Axion Astrophysics
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Stars have been recognized as optimal laboratories to probe axion properties. In the last decades there have been significant advances in this field due to a better modelling of stellar systems and accurate observational data. In this work we review the current status of constraints on axions from stellar physics. We focus in particular on the Sun, globular cluster stars, white dwarfs and (proto)-neutron stars.
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Cited by 14 Pith papers
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Lights, Camera, Axion: Tracing Axions from Supernovae in the Diffuse $\gamma$-ray Sky
Axions produced in supernovae generate a diffuse gamma-ray signal through conversion in magnetic fields, yielding competitive constraints on the axion-photon coupling from COMPTEL, EGRET, and Fermi-LAT data plus forec...
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Landau-Zener formula and resonant axion conversion in neutron star magnetospheres
The Landau-Zener approximation for axion-photon conversion in neutron star magnetospheres fails when resonance width exceeds conversion region size, leading to revised axion constraints from optical-band searches.
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Heavy Axion from a Confining Mirror GUT
A mirror GUT model confines dynamically to produce a heavy axion solving the strong CP problem while allowing observable EDMs and a rich hidden sector.
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Rotation-induced Relaxation of Supernova Constraints on Axionlike Particles
Stellar rotation relaxes supernova energy-loss bounds on axion-like particles by reducing core temperatures but has negligible impact on gamma-ray constraints from SN 1987A.
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Stripped-Envelope Supernovae for QCD Axion Detection
Stripped-envelope supernovae enable QCD axion detection to masses around 10^{-4} eV via gamma-ray signals from conversion in progenitor magnetic fields.
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Reappraisal of the Constraints on Heavy Axion-like Particles from Gamma-Ray Bursts
Realistic GRB parameters weaken previous ALP cooling bounds, but ALP-induced secondary fireballs in GRBs could still be probed via isotropic X-ray emission from future telescopes.
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Enhanced Stellar Production of Weakly Interacting Slim Particles from Non-Thermal Nuclear Cascades
Non-thermal photon cascades via Compton reprocessing and positron annihilation in stars create a broad photon spectrum that substantially boosts photon-coupled WISP production, as shown for solar dark photons.
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Axion-photon conversion in transient compact stars: Systematics, constraints, and opportunities
Analytical expressions for ALP-photon conversion in transient compact stars yield an updated bound g_aγ < 5×10^{-12} GeV^{-1} for m_a ≲ 10^{-9} eV from SN 1987A, plus sensitivity forecasts for future Galactic SN and N...
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INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_{i}-L_{j}$ Vectors
This work sets new upper limits on decay lifetimes and couplings for axion-like particles, dark photons, scalars, and B-L or L_i-L_j vector bosons using 511 keV line, X-ray continuum, and cosmic-ray flux observations.
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Core Composition Effects on the QCD Axion Mass Limit from Neutron Star Cooling
Varying neutron star core composition with hyperons and Delta resonances mildly affects the QCD axion mass limit from cooling, potentially bringing the DFSZ limit into the IAXO sensitivity window.
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NuSTAR as an Axion Helioscope: probing axion-nucleon and axion-electron couplings
NuSTAR solar minimum data sets g_ae · g_aγ ≲ 1.1×10^{-24} GeV^{-1} and g_aN^eff · g_aγ ≲ 2.3×10^{-19} GeV^{-1} at 95% CL for m_a ≲ 10^{-6} eV.
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Production of Leptophilic Bosons in Ultradegenerate Relativistic Matter
Derives bremsstrahlung production rates and T-dependent energy-loss scalings for leptophilic bosons in NS cores to enable coupling constraints from cooling data.
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Looking for Lights from the Darkness: Signals from MeV-scale Solar Axion-like Particles
Solar axion-like particles up to 5.5 MeV produce off-axis MeV photons via two-body decay, enabling new space and terrestrial searches that could probe g_aγ down to 10^{-12} GeV^{-1}.
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Flavor phenomenology of light dark particles
Review surveying limits and prospects for flavor-violating decays of light axion-like particles, highlighting complementarity of lab, astro, and cosmo probes up to 10^12 GeV scales.
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