4HWC J2029$+$3641: a Pulsar Wind Nebula Powered by PSR J2030$+$3641?
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| Format: | Preprint |
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2026
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| _version_ | 1866913084870754304 |
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| author | Ou, Ziwei Wang, Jie Pei, Songpeng |
| author_facet | Ou, Ziwei Wang, Jie Pei, Songpeng |
| contents | 4HWC J2029+3641 is a newly discovered point source detected by HAWC, with no previously identified TeV counterpart. The gamma-ray pulsar PSR J2030+3641, located 0.1 degree from the source center, is a middle-aged pulsar showing spin parameters similar to Geminga. Using Fermni-LAT data spanning from August 2008 to February 2026, we performed binned maximum likelihood spectral analysis in the energy range from 300 MeV to 1 PeV. A phase-resolved analysis was conducted to separate the off-peak and on-peak emissions. No significant spatial extension was found for the off-peak component. The off-peak spectrum exhibits strong curvature and is best described by an exponentially cutoff power-law model. The observed radio-to-gamma phase lag and narrow peak separation favor an outer-gap model for the gamma-ray emission. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_01988 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | 4HWC J2029$+$3641: a Pulsar Wind Nebula Powered by PSR J2030$+$3641? Ou, Ziwei Wang, Jie Pei, Songpeng High Energy Astrophysical Phenomena 4HWC J2029+3641 is a newly discovered point source detected by HAWC, with no previously identified TeV counterpart. The gamma-ray pulsar PSR J2030+3641, located 0.1 degree from the source center, is a middle-aged pulsar showing spin parameters similar to Geminga. Using Fermni-LAT data spanning from August 2008 to February 2026, we performed binned maximum likelihood spectral analysis in the energy range from 300 MeV to 1 PeV. A phase-resolved analysis was conducted to separate the off-peak and on-peak emissions. No significant spatial extension was found for the off-peak component. The off-peak spectrum exhibits strong curvature and is best described by an exponentially cutoff power-law model. The observed radio-to-gamma phase lag and narrow peak separation favor an outer-gap model for the gamma-ray emission. |
| title | 4HWC J2029$+$3641: a Pulsar Wind Nebula Powered by PSR J2030$+$3641? |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.01988 |