Probing photon-ALP oscillations from the MAGIC observations of FSRQ QSO B1420+326
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arXiv
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| Natura: | Preprint |
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2023
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| _version_ | 1866929209577832448 |
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| author | Pant, Bhanu Prakash |
| author_facet | Pant, Bhanu Prakash |
| contents | At the beginning of 2020, MAGIC reported a very-high-energy (VHE) flaring activity from the FSRQ QSO B1420+326. It is now the fourth known most distant blazar (z=0.682) with an observed VHE gamma-ray emission. In this work, we investigate the effect of photon-axionlike particle (ALP) oscillations in the gamma-ray spectra measured by Fermi-LAT and MAGIC around the flaring state. We set 95% C.L. upper limit on the ALP parameters and obtain a constraint on the photon-ALP coupling constant $g_{aγ} < 2\times10^{-11}$ GeV$^{-1}$ for ALP masses $m_{a} \sim 10^{-10}-10^{-9}$ eV. Assuming the hadronic origin of VHE photons, we also estimate the expected neutrino flux from this source and the contribution to diffuse neutrino flux from QSO B1420+326-like FSRQs at sub-PeV energies. Furthermore, we study the implications of photon-ALP oscillations on the counterpart $γ$-rays of the sub-PeV neutrinos. Finally, we investigate a viable scenario of invisible neutrino decay to ALPs on the gamma-ray spectra and diffuse $γ$-ray flux at sub-PeV energies. Interestingly, we find that for the choice of neutrino lifetime $τ_{2}/m_{2} = 10^3$ s eV$^{-1}$, the $γ$-ray flux has a good observational sensitivity towards LHAASO-KM2A. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_16634 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Probing photon-ALP oscillations from the MAGIC observations of FSRQ QSO B1420+326 Pant, Bhanu Prakash High Energy Astrophysical Phenomena High Energy Physics - Phenomenology At the beginning of 2020, MAGIC reported a very-high-energy (VHE) flaring activity from the FSRQ QSO B1420+326. It is now the fourth known most distant blazar (z=0.682) with an observed VHE gamma-ray emission. In this work, we investigate the effect of photon-axionlike particle (ALP) oscillations in the gamma-ray spectra measured by Fermi-LAT and MAGIC around the flaring state. We set 95% C.L. upper limit on the ALP parameters and obtain a constraint on the photon-ALP coupling constant $g_{aγ} < 2\times10^{-11}$ GeV$^{-1}$ for ALP masses $m_{a} \sim 10^{-10}-10^{-9}$ eV. Assuming the hadronic origin of VHE photons, we also estimate the expected neutrino flux from this source and the contribution to diffuse neutrino flux from QSO B1420+326-like FSRQs at sub-PeV energies. Furthermore, we study the implications of photon-ALP oscillations on the counterpart $γ$-rays of the sub-PeV neutrinos. Finally, we investigate a viable scenario of invisible neutrino decay to ALPs on the gamma-ray spectra and diffuse $γ$-ray flux at sub-PeV energies. Interestingly, we find that for the choice of neutrino lifetime $τ_{2}/m_{2} = 10^3$ s eV$^{-1}$, the $γ$-ray flux has a good observational sensitivity towards LHAASO-KM2A. |
| title | Probing photon-ALP oscillations from the MAGIC observations of FSRQ QSO B1420+326 |
| topic | High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2310.16634 |