A failed wind candidate in NGC 3783 from the 2001 year campaign with Chandra/HETGS
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915172025630720 |
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| author | Li, Chen Kaastra, Jelle S. Gu, Liyi Rogantini, Daniele Juráňová, Anna Mehdipour, Missagh de Plaa, Jelle |
| author_facet | Li, Chen Kaastra, Jelle S. Gu, Liyi Rogantini, Daniele Juráňová, Anna Mehdipour, Missagh de Plaa, Jelle |
| contents | We reanalyze the Chandra/HETGS observations of NGC 3783 from the campaign in the year 2001, identifying significant spectral variations in the Fe unresolved transition array (UTA) over timescales of weeks to months. These changes correlate with a $1.4-2$ fold increase in the ionizing continuum and exceed $10 \, σ$ significance. The variations primarily originate from a low-ionization state ($\rm log ξ= 1.65$) component of the warm absorber. Time-dependent photoionization modelling confirms the sensitivity of this low-ionization component to continuum variations within the Fe UTA band. Local fitting indicates a lower density limit of $>10^{12.3} \, \rm m^{-3}$ at $3 \, σ$ statistical uncertainty, with the component located within $0.27 \, \rm pc$. Our findings suggest that this low-ionization component is a potential failed wind candidate. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_16880 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A failed wind candidate in NGC 3783 from the 2001 year campaign with Chandra/HETGS Li, Chen Kaastra, Jelle S. Gu, Liyi Rogantini, Daniele Juráňová, Anna Mehdipour, Missagh de Plaa, Jelle High Energy Astrophysical Phenomena Astrophysics of Galaxies We reanalyze the Chandra/HETGS observations of NGC 3783 from the campaign in the year 2001, identifying significant spectral variations in the Fe unresolved transition array (UTA) over timescales of weeks to months. These changes correlate with a $1.4-2$ fold increase in the ionizing continuum and exceed $10 \, σ$ significance. The variations primarily originate from a low-ionization state ($\rm log ξ= 1.65$) component of the warm absorber. Time-dependent photoionization modelling confirms the sensitivity of this low-ionization component to continuum variations within the Fe UTA band. Local fitting indicates a lower density limit of $>10^{12.3} \, \rm m^{-3}$ at $3 \, σ$ statistical uncertainty, with the component located within $0.27 \, \rm pc$. Our findings suggest that this low-ionization component is a potential failed wind candidate. |
| title | A failed wind candidate in NGC 3783 from the 2001 year campaign with Chandra/HETGS |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2501.16880 |