Fermi-LAT and FAST observation of the gamma-ray binary HESS J0632+057
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arXiv
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2025
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| _version_ | 1866909590260547584 |
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| author | Yang, Yanlv Zhou, Dengke Zhao, Zihao Li, Jian Torres, Diego F. Wang, Pei |
| author_facet | Yang, Yanlv Zhou, Dengke Zhao, Zihao Li, Jian Torres, Diego F. Wang, Pei |
| contents | Using 15 years of data from the Fermi Large Area Telescope (Fermi-LAT), we performed a comprehensive analysis on the gamma-ray binary HESS J0632+057. Its spectrum in 0.1-300 GeV band is well described by a power law model with an index of $2.40\pm0.16$, leading to an energy flux of (5.5$\pm$1.6$)\times$ 10$^{-12}$ erg cm$^{-2}$ s$^{-1}$. The GeV Spectral Energy Distribution (SED) of HESS J0632+057 hints for a spectral turn-over between $\sim$10-100 GeV. Orbital analysis reveals a flux enhancement during the phase range of 0.2-0.4, consistent with the X-ray and TeV light curves, indicating an origin of a common particle population. We carried out six deep radio observations on HESS J0632+057 with the Five-hundred-meter Aperture Spherical Telescope (FAST), evenly distributed across its orbit, reaching a detection sensitivity of 2$μ$Jy. However, no radio pulsation was detected within these observations. The absence of radio pulsation may be attributed to the dense stellar wind environment of HESS J0632+057. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_16881 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fermi-LAT and FAST observation of the gamma-ray binary HESS J0632+057 Yang, Yanlv Zhou, Dengke Zhao, Zihao Li, Jian Torres, Diego F. Wang, Pei High Energy Astrophysical Phenomena Using 15 years of data from the Fermi Large Area Telescope (Fermi-LAT), we performed a comprehensive analysis on the gamma-ray binary HESS J0632+057. Its spectrum in 0.1-300 GeV band is well described by a power law model with an index of $2.40\pm0.16$, leading to an energy flux of (5.5$\pm$1.6$)\times$ 10$^{-12}$ erg cm$^{-2}$ s$^{-1}$. The GeV Spectral Energy Distribution (SED) of HESS J0632+057 hints for a spectral turn-over between $\sim$10-100 GeV. Orbital analysis reveals a flux enhancement during the phase range of 0.2-0.4, consistent with the X-ray and TeV light curves, indicating an origin of a common particle population. We carried out six deep radio observations on HESS J0632+057 with the Five-hundred-meter Aperture Spherical Telescope (FAST), evenly distributed across its orbit, reaching a detection sensitivity of 2$μ$Jy. However, no radio pulsation was detected within these observations. The absence of radio pulsation may be attributed to the dense stellar wind environment of HESS J0632+057. |
| title | Fermi-LAT and FAST observation of the gamma-ray binary HESS J0632+057 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2504.16881 |