NGC 7314: X-ray Study of the Evolving Accretion Properties
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909332965163008 |
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| author | Chatterjee, Debjit Jana, Arghajit Mangalam, A. Chang, Hsiang-Kuang |
| author_facet | Chatterjee, Debjit Jana, Arghajit Mangalam, A. Chang, Hsiang-Kuang |
| contents | We present a comprehensive analysis of the timing and spectral properties of NGC 7314, a Seyfert 1.9 galaxy, using X-ray observations from {\it XMM-Newton}, {\it NuSTAR}, and {\it RXTE}/PCA. The timing analysis reveals significant variability across different energy bands, with fractional variability (F$_{\rm var}$) values consistent with previous studies. The highly variable soft photons and comparatively less variable high energy photons imply different origins of these two types. The soft energy photons come from a hot corona near the center, while the high-energy photons are produced by inverse Compton scattering of these primary X-ray photons in a hot plasma away from the central region. The spectral analysis employs various models to characterize the emission components. The results indicate the presence of a soft energy bump, Fe K$α$ line emission, and a prominent reflection component. The long-term {\it RXTE}/PCA data analysis reveals temporal variations in the photon index ($Γ$) and power-law flux, suggesting evolving emission properties over time. The signature of both broad and narrow Fe~K$α$ emission line features suggested the broad, variable one coming from the accretion disk ($\sim10^{-5}$~pc), while the non-evolving narrow line can not be well constrained. The absorption feature could originate in a highly ionized region, possibly closer to the broad-line region (BLR). The evolution of the inner accretion properties indicates that NGC 7314 could be a potential changing-state active galactic nuclei. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01328 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | NGC 7314: X-ray Study of the Evolving Accretion Properties Chatterjee, Debjit Jana, Arghajit Mangalam, A. Chang, Hsiang-Kuang High Energy Astrophysical Phenomena We present a comprehensive analysis of the timing and spectral properties of NGC 7314, a Seyfert 1.9 galaxy, using X-ray observations from {\it XMM-Newton}, {\it NuSTAR}, and {\it RXTE}/PCA. The timing analysis reveals significant variability across different energy bands, with fractional variability (F$_{\rm var}$) values consistent with previous studies. The highly variable soft photons and comparatively less variable high energy photons imply different origins of these two types. The soft energy photons come from a hot corona near the center, while the high-energy photons are produced by inverse Compton scattering of these primary X-ray photons in a hot plasma away from the central region. The spectral analysis employs various models to characterize the emission components. The results indicate the presence of a soft energy bump, Fe K$α$ line emission, and a prominent reflection component. The long-term {\it RXTE}/PCA data analysis reveals temporal variations in the photon index ($Γ$) and power-law flux, suggesting evolving emission properties over time. The signature of both broad and narrow Fe~K$α$ emission line features suggested the broad, variable one coming from the accretion disk ($\sim10^{-5}$~pc), while the non-evolving narrow line can not be well constrained. The absorption feature could originate in a highly ionized region, possibly closer to the broad-line region (BLR). The evolution of the inner accretion properties indicates that NGC 7314 could be a potential changing-state active galactic nuclei. |
| title | NGC 7314: X-ray Study of the Evolving Accretion Properties |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2410.01328 |