Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2502.20804 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909516687212544 |
|---|---|
| author | Dong, L. J. Zheng, Y. G. Kang, S. J. Yang, C. Y. |
| author_facet | Dong, L. J. Zheng, Y. G. Kang, S. J. Yang, C. Y. |
| contents | The very high energy (VHE, E $>$ $100 \mathrm~{GeV}$) $γ$-ray observations offer a possibility of indirectly detecting the presence of axion-like particles (ALPs). The paper focuses on detecting photon-ALP oscillations on $γ$-ray spectra from distant sources in astrophysical magnetic fields. Strong evidence indicates that: (1) the photon-ALP oscillations can effectively decrease the photon absorption at energies of several tens of TeV -- caused by the extragalactic background light (EBL) -- to a level able to explain better the observational data; (2) the impact of magnetic-field models in photon-ALP beams crossing several magnetized media is significant. We revisit the expected signature for the photon-ALP oscillation effects on $γ-γ$ absorption in the TeV spectra of Mrk 501. The result issues that the photon-ALP beam propagation with mass $\mathrm{m_a}\sim10^{-10} eV$ and two-photon coupling constant $\begin{aligned}g_{aγ}\sim0.417\times10^{-11}GeV^{-1}\end{aligned}$ crossing reasonable magnetic field scenarios considered here can roughly reproduce the observed TeV $γ$-ray spectra for Mrk 501. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_20804 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Photon-ALP beam propagation from Mrk 501 Dong, L. J. Zheng, Y. G. Kang, S. J. Yang, C. Y. High Energy Astrophysical Phenomena The very high energy (VHE, E $>$ $100 \mathrm~{GeV}$) $γ$-ray observations offer a possibility of indirectly detecting the presence of axion-like particles (ALPs). The paper focuses on detecting photon-ALP oscillations on $γ$-ray spectra from distant sources in astrophysical magnetic fields. Strong evidence indicates that: (1) the photon-ALP oscillations can effectively decrease the photon absorption at energies of several tens of TeV -- caused by the extragalactic background light (EBL) -- to a level able to explain better the observational data; (2) the impact of magnetic-field models in photon-ALP beams crossing several magnetized media is significant. We revisit the expected signature for the photon-ALP oscillation effects on $γ-γ$ absorption in the TeV spectra of Mrk 501. The result issues that the photon-ALP beam propagation with mass $\mathrm{m_a}\sim10^{-10} eV$ and two-photon coupling constant $\begin{aligned}g_{aγ}\sim0.417\times10^{-11}GeV^{-1}\end{aligned}$ crossing reasonable magnetic field scenarios considered here can roughly reproduce the observed TeV $γ$-ray spectra for Mrk 501. |
| title | Photon-ALP beam propagation from Mrk 501 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2502.20804 |