Delving into the depths of NGC 3783 with XRISM. I. Kinematic and ionization structure of the highly ionized outflows

Abstract

We present our study of the XRISM observation of the Seyfert-1 galaxy NGC 3783. XRISM's Resolve microcalorimeter has enabled, for the first time, a detailed characterization of the highly ionized outflows in this active galactic nucleus. Our analysis constrains their outflow and turbulent velocities, along with their ionization parameter ($\xi$) and column density ($N_{\mathrm{H}}$). The high-resolution Resolve spectrum reveals a distinct series of Fe absorption lines between 6.4 and 7.8 keV, ranging from Fe XVIII to Fe XXVI. At lower energies, absorption features from Si, S, and Ar are also detected. Our spectroscopy and photoionization modeling of the time-averaged Resolve spectrum uncovers six outflow components, five of which exhibit relatively narrow absorption lines with outflow velocities ranging from 560 to 1170 km/s. In addition, a broad absorption feature is detected, which is consistent with Fe XXVI outflowing at 14,300 km/s (0.05 $c$). The kinetic luminosity of this component is 0.8-3% of the bolometric luminosity. Our analysis of the Resolve spectrum shows that more highly ionized absorption lines are intrinsically broader than those of lower-ionization species, indicating that the turbulent velocity of the six outflow components (ranging from 0 to 3500 km/s) increases with $\xi$. Furthermore, we find that the $N_{\mathrm{H}}$ of the outflows generally declines with $\xi$ up to $\log \xi =3.2$ but rises beyond this point, suggesting a complex ionization structure. The absorption profile of the Fe XXV resonance line is intriguingly similar to UV absorption lines (Ly$\alpha$ and C IV) observed by the HST, from which we infer that the outflows are clumpy in nature. Our XRISM/Resolve results support a "hybrid wind" scenario in which the observed outflows have multiple origins and driving mechanisms. We explore various interpretations of our findings within AGN wind models.

Accepted for publication in A&A, 10 pages, 6 figures

References in corpus (20)

• Ionized outflows from active galactic nuclei as the essential elements of feedback
• Unifying the micro and macro properties of AGN feeding and feedback
• Systematic comparison of photoionised plasma codes with application to spectroscopic studies of AGN in X-rays
• Magnetically-Driven Accretion-Disk Winds and Ultra-Fast Outflows in PG1211+143
• Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783
• UV line driven disc wind as the origin of ultrafast outflows in AGN
• Structured ionized winds shooting out from a quasar at relativistic speeds
• Clumpy AGN outflows due to thermal instability
• Multiphase AGN winds from X-ray irradiated disk atmospheres
• Irradiation of Astrophysical Objects - SED and Flux Effects on Thermally Driven Winds
• Radiation Pressure Confinement -- III. The origin of the broad ionization distribution in AGN outflows
• Tell-Tale Spectral Signatures of MHD-driven Ultra-Fast Outflows in AGNs
• Dynamical thermal instability in highly supersonic outflows
• 10-Year Transformation of the Obscuring Wind in NGC 5548
• Optimization of x-ray event screening using ground and in-orbit data for the Resolve instrument onboard the XRISM satellite
• Long-term X-ray stability and UV variability of the ionized absorption in NGC 3783
• On Synthetic Absorption Line Profiles of Thermally Driven Winds from Active Galactic Nuclei
• Time-dependent photoionization spectroscopy of the Seyfert galaxy NGC 3783
• Short time-scale X-ray spectral variability in the Seyfert 1 galaxy NGC 3783
• A failed wind candidate in NGC 3783 from the 2001 year campaign with Chandra/HETGS

Cited by in corpus (5)

• Delving into the depths of NGC 3783 with XRISM II. Cross-calibration of X-ray instruments used in the large, multi-mission observational campaign
• Delving into the depths of NGC 3783 with XRISM III. Birth of an ultrafast outflow during a soft flare
• Delving into the depths of NGC 3783 with XRISM: V. Broad-band modeling of ionized outflows
• Unveiling the dynamics of the ultra-fast outflow in IRAS 13224-3809 with X-ray spectroscopy
• Unveiling BLR Structure in AGN with High Resolution X-Ray Spectra: An Analytic Approach to Wind Emission Line Profiles