Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons
We compute in detail the absorption optical depth for astrophysical γ -ray photons interacting with solar photons to produce electron–positron pairs. This effect is greatest for γ -ray sources at small angular distances from the Sun, reaching optical depths as high as τ _γ _γ ∼ 10 ^−2 . We also calc...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/ad3212 |
| _version_ | 1797223646039638016 |
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| author | Justin D. Finke Parshad Patel |
| author_facet | Justin D. Finke Parshad Patel |
| author_sort | Justin D. Finke |
| collection | DOAJ |
| description | We compute in detail the absorption optical depth for astrophysical γ -ray photons interacting with solar photons to produce electron–positron pairs. This effect is greatest for γ -ray sources at small angular distances from the Sun, reaching optical depths as high as τ _γ _γ ∼ 10 ^−2 . We also calculate this effect including modifications to the absorption cross-section threshold from subluminal Lorentz invariance violation (LIV). We show for the first time that subluminal LIV can lead to increases or decreases in τ _γ _γ compared to the non-LIV case. We show that, at least in principle, LIV can be probed with this effect with observations of γ -ray sources near the Sun at ≳20 TeV by HAWC or LHAASO, although a measurement will be extremely difficult due to the small size of the effect. |
| first_indexed | 2024-04-24T13:40:32Z |
| format | Article |
| id | doaj.art-35c064fe698c4cc9ade5f1f2c0c35bdc |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-04-24T13:40:32Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-35c064fe698c4cc9ade5f1f2c0c35bdc2024-04-04T08:50:52ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0196514410.3847/1538-4357/ad3212Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar PhotonsJustin D. Finke0https://orcid.org/0000-0001-5941-7933Parshad Patel1https://orcid.org/0000-0002-8835-8941U.S. Naval Research Laboratory , Code 7653, 4555 Overlook Ave. SW, Washington, DC 20375-5352, USA ; justin.finke@nrl.navy.mil, parshadkp@gmail.comU.S. Naval Research Laboratory , Code 7653, 4555 Overlook Ave. SW, Washington, DC 20375-5352, USA ; justin.finke@nrl.navy.mil, parshadkp@gmail.comWe compute in detail the absorption optical depth for astrophysical γ -ray photons interacting with solar photons to produce electron–positron pairs. This effect is greatest for γ -ray sources at small angular distances from the Sun, reaching optical depths as high as τ _γ _γ ∼ 10 ^−2 . We also calculate this effect including modifications to the absorption cross-section threshold from subluminal Lorentz invariance violation (LIV). We show for the first time that subluminal LIV can lead to increases or decreases in τ _γ _γ compared to the non-LIV case. We show that, at least in principle, LIV can be probed with this effect with observations of γ -ray sources near the Sun at ≳20 TeV by HAWC or LHAASO, although a measurement will be extremely difficult due to the small size of the effect.https://doi.org/10.3847/1538-4357/ad3212Quiet SunGamma-ray astronomy |
| spellingShingle | Justin D. Finke Parshad Patel Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons The Astrophysical Journal Quiet Sun Gamma-ray astronomy |
| title | Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons |
| title_full | Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons |
| title_fullStr | Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons |
| title_full_unstemmed | Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons |
| title_short | Probing Lorentz Invariance Violation with Absorption of Astrophysical γ-Rays by Solar Photons |
| title_sort | probing lorentz invariance violation with absorption of astrophysical γ rays by solar photons |
| topic | Quiet Sun Gamma-ray astronomy |
| url | https://doi.org/10.3847/1538-4357/ad3212 |
| work_keys_str_mv | AT justindfinke probinglorentzinvarianceviolationwithabsorptionofastrophysicalgraysbysolarphotons AT parshadpatel probinglorentzinvarianceviolationwithabsorptionofastrophysicalgraysbysolarphotons |