Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275
In this work, we re-analyze the Fermi-LAT observation of NGC 1275 to search for axion-like particle (ALP) effects and constrain ALP parameters. Instead of fitting the observed spectrum with ALP models, we adopt an alternative method for the analysis of this source which calculates the irregularity o...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321005517 |
| _version_ | 1819104363516264448 |
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| author | Ji-Gui Cheng Ya-Jun He Yun-Feng Liang Rui-Jing Lu En-Wei Liang |
| author_facet | Ji-Gui Cheng Ya-Jun He Yun-Feng Liang Rui-Jing Lu En-Wei Liang |
| author_sort | Ji-Gui Cheng |
| collection | DOAJ |
| description | In this work, we re-analyze the Fermi-LAT observation of NGC 1275 to search for axion-like particle (ALP) effects and constrain ALP parameters. Instead of fitting the observed spectrum with ALP models, we adopt an alternative method for the analysis of this source which calculates the irregularity of the spectrum. With the newly used method, we find no spectral oscillation for the NGC 1275 and rule out couplings gaγ>3×10−12GeV−1 around ALP mass of ma∼1 neV at 95% confidence level, which is more stringent than the previous results. We also show that the constraints can be further improved by combining the observation of PKS 2155-304. We suggest that with more sources taken into account, we could obtain a much wider exclusion region. |
| first_indexed | 2024-12-22T02:05:10Z |
| format | Article |
| id | doaj.art-1df99f2d7fc34a0faafcbd7f4c4c0747 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-22T02:05:10Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-1df99f2d7fc34a0faafcbd7f4c4c07472022-12-21T18:42:32ZengElsevierPhysics Letters B0370-26932021-10-01821136611Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275Ji-Gui Cheng0Ya-Jun He1Yun-Feng Liang2Rui-Jing Lu3En-Wei Liang4Guangxi Key Laboratory for Relativistic Astrophysics, School of Physics Science and Technology, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory for Relativistic Astrophysics, School of Physics Science and Technology, Guangxi University, Nanning 530004, ChinaCorresponding authors.; Guangxi Key Laboratory for Relativistic Astrophysics, School of Physics Science and Technology, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory for Relativistic Astrophysics, School of Physics Science and Technology, Guangxi University, Nanning 530004, ChinaCorresponding authors.; Guangxi Key Laboratory for Relativistic Astrophysics, School of Physics Science and Technology, Guangxi University, Nanning 530004, ChinaIn this work, we re-analyze the Fermi-LAT observation of NGC 1275 to search for axion-like particle (ALP) effects and constrain ALP parameters. Instead of fitting the observed spectrum with ALP models, we adopt an alternative method for the analysis of this source which calculates the irregularity of the spectrum. With the newly used method, we find no spectral oscillation for the NGC 1275 and rule out couplings gaγ>3×10−12GeV−1 around ALP mass of ma∼1 neV at 95% confidence level, which is more stringent than the previous results. We also show that the constraints can be further improved by combining the observation of PKS 2155-304. We suggest that with more sources taken into account, we could obtain a much wider exclusion region.http://www.sciencedirect.com/science/article/pii/S0370269321005517Dark matterGamma rays: generalAxion-like particle |
| spellingShingle | Ji-Gui Cheng Ya-Jun He Yun-Feng Liang Rui-Jing Lu En-Wei Liang Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 Physics Letters B Dark matter Gamma rays: general Axion-like particle |
| title | Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 |
| title_full | Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 |
| title_fullStr | Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 |
| title_full_unstemmed | Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 |
| title_short | Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275 |
| title_sort | revisiting the analysis of axion like particles with the fermi lat gamma ray observation of ngc1275 |
| topic | Dark matter Gamma rays: general Axion-like particle |
| url | http://www.sciencedirect.com/science/article/pii/S0370269321005517 |
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