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A failed wind candidate in NGC 3783 from the 2001 campaign with

Year: 2025

Type: article

Abstract: We reanalyse the Chandra/HETGS observations of NGC 3783 from the campaign in the year 2001 and identify significant spectral variations in the Fe unresolved transition array (UTA) over timescales of weeks to months. These changes correlate with a 1.4− to two-fold increase in the ionising continuum and exceed 10σ significance. The variations primarily originate from a low-ionisation state (log ξ = 1.65) component of the warm absorber. Time-dependent photoionisation modelling confirmed the sensitivity of this low-ionisation component to continuum variations within the Fe UTA band. Local fitting indicated a lower density limit of > 1012.3 m−3 at a 3σ statistical uncertainty, with the component located within 0.27 pc. Our findings suggest that this low-ionisation component is a potential failed wind candidate.

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/0004-6361/202452911/pdf

Authors: Chen Li, Jelle S. Kaastra, Liyi Gu, Daniele Rogantini, Anna Juráňová, Missagh Mehdipour, Jelle de Plaa

Institutions: Leiden University, Leiden Observatory, Space Research Organisation Netherlands, University of Chicago, Massachusetts Institute of Technology, Space Telescope Science Institute

Language: English

Topic: Astrophysical Phenomena and Observations

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Universiteit Leiden, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, China Scholarship Council

OpenAlex ID: W6959650781

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