Modulations in Spectra of Galactic Gamma-ray sources as a result of photon-ALPs mixing
| Autor: | Francesca Calore, Dieter Horns, Jhilik Majumdar |
|---|---|
| Přispěvatelé: | Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
History
Photon Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics attenuation: energy dependence magnetic field: galaxy 01 natural sciences gamma ray: energy spectrum rotation Education Physics::Geophysics symbols.namesake High Energy Physics - Phenomenology (hep-ph) photon: oscillation 0103 physical sciences Faraday effect quantum chromodynamics mixing 010306 general physics 010303 astronomy & astrophysics Axion Coupling constant Physics gamma ray: galaxy High Energy Astrophysical Phenomena (astro-ph.HE) pseudoscalar particle Gamma ray coupling constant Galactic plane Computer Science Applications modulation High Energy Physics - Phenomenology axion [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] symbols axion-like particles Strong CP problem strong interaction: CP [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - High Energy Astrophysical Phenomena Fermi Gamma-ray Space Telescope |
| Zdroj: | J.Phys.Conf.Ser. 15th International Conference on Topics in Astroparticle and Underground Physics 15th International Conference on Topics in Astroparticle and Underground Physics, Jul 2017, Sudbury, Canada. pp.012073, ⟨10.1088/1742-6596/1342/1/012073⟩ |
| DOI: | 10.48550/arxiv.1710.09894 |
| Popis: | Axion like particles (ALPs) are fundamental pseudo scalar particles with properties similar to Axions which are a well-known extension of the standard model to solve the strong CP problem in Quantum Chromodynamics. ALPs can oscillate into photons and vice versa in the presence of an external tranversal magnetic field. This oscillation of photon and ALPs could have important implications for astronomical observations, i.e. a characteristic energy dependent attenuation in Gamma ray spectra for astrophysical sources. Here we have revisited the opportunity to search Photon-ALPs coupling in the disappearance channel. We use eight years of Fermi Pass 8 data of a selection of promising galactic Gamma-ray source candidates and study the modulation in the spectra in accordance with Photon-ALPs mixing and estimate best fit values of the parameters i.e. Photon-ALPs coupling constant$ (g_{\alpha\gamma\gamma} )$ and ALPs mass($m_{\alpha} $). For the magnetic field we use large scale galactic magnetic field models based on Faraday rotation measurements and we have also studied the survival probability of photons in the Galactic plane. Comment: 5 pages, 10 figures, submitted as a proceeding of the XV International Conference on Topics in Astroparticle and Underground Physics for Journal of Physics: Conference Series (JPCS) |
| Databáze: | OpenAIRE |
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