Delving into the depths of NGC 3783 with XRISM III. Birth of an ultrafast outflow during a soft flare
arXiv:2512.08448 · doi:10.1051/0004-6361/202557189
Abstract
The 2024 X-ray/UV observation campaign of NGC 3783, led by XRISM, revealed the launch of an ultrafast outflow (UFO) with a radial velocity of 0.19c (57000 km/s). This event is synchronized with the sharp decay, within less than half a day, of a prominent soft X-ray/UV flare. Accounting for the look-elsewhere effect, the XRISM Resolve data alone indicate a low probability of 2e-5 that this UFO detection is due to random chance. The UFO features narrow H-like and He-like Fe lines with a velocity dispersion of 1000 km/s, suggesting that it originates from a dense clump. Beyond this primary detection, there are hints of weaker outflow signatures throughout the rise and fall phases of the soft flare. Their velocities increase from 0.05c to 0.3c over approximately three days, and they may be associated with a larger stream in which the clump is embedded. The radiation pressure is insuffcient to drive the acceleration of this rapidly evolving outflow. The observed evolution of the outflow kinematics instead closely resembles that of solar coronal mass ejections, implying magnetic driving and, conceivably, reconnection near the accretion disk as the likely mechanisms behind both the UFO launch and the associated soft flare.
arXiv comment13 pages, 12 figures, published on A&A
References in corpus (49)
- Observational Evidence of AGN Feedback
- Magnetically Arrested Disk: An Energetically Efficient Accretion Flow
- Powerful Outflows and Feedback from Active Galactic Nuclei
- Evidence for ultra-fast outflows in radio-quiet AGNs: I - detection and statistical incidence of Fe K-shell absorption lines
- Quasar Feedback: More Bang for Your Buck
- MERLIN observations of relativistic ejections from GRS 1915+105
- A high velocity ionised outflow and XUV photosphere in the narrow emission line quasar PG1211+143
- Unification of X-ray winds in Seyfert galaxies: from ultra-fast outflows to warm absorbers
- The Ionized Gas and Nuclear Environment in NGC 3783. I. Time-Averaged 900 ks Chandra Grating Spectroscopy
- A Massive X-Ray Outflow from the Quasar PDS 456
- Black hole feedback in the luminous quasar PDS 456
- Magnetic Reconnection and Hot Spot Formation in Black Hole Accretion Disks
- Global Radiation-Magnetohydrodynamic Simulations of Black Hole Accretion Flow and Outflow: Unified Model of Three States
- Flows of X-ray gas reveal the disruption of a star by a massive black hole
- Evidence for ultra-fast outflows in radio-quiet AGNs: III - location and energetics
- MHD Accretion-Disk Winds as X-ray Absorbers in AGNs
- High-Resolution X-ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in NGC 3783
- Magnetic reconnection: flares and coronal heating in Active Galactic Nuclei
- A Long Look at NGC 3783 with the XMM-Newton Reflection Grating Spectrometers
- Accretion disc coronae as magnetic reservoirs
- Clumpy Outflow from Supercritical Accretion Flows
- A Magnetohydrodynamic Model for the Formation of Episodic Jets
- Global Three-Dimensional Simulations of Black Hole Accretion Disks: X-ray Flares in the Plunging Region
- Systematic comparison of photoionised plasma codes with application to spectroscopic studies of AGN in X-rays
- Turbulent kinetic energy in the energy balance of a solar flare
- The NewAthena mission concept in the context of the next decade of X-ray astronomy
- Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783
- Dynamical and Spectral Modeling of the Ionized Gas and Nuclear Environment in NGC 3783
- The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
- New Evidence for Efficient Collisionless Heating of Electrons at the Reverse Shock of a Young Supernova Remnant
- The origin of ultra-fast outflows in AGN: Monte-Carlo simulations of the wind in PDS 456
- Searching for Outflows in Ultraluminous X-ray Sources Through High-Resolution X-ray Spectroscopy
- An extended XMM-Newton observation of the Seyfert galaxy NGC 4051. I. Evidence for a shocked outflow
- Searching for Ultra-fast Outflows in AGN using Variability Spectra
- Evidence for an emerging disc wind and collimated outflow during an X-ray flare in the narrow-line Seyfert 1 galaxy Mrk 335
- XMM-Newton Campaign On Ultraluminous X-ray Source NGC 1313 X-1: Wind vs. State Variability
- Structured ionized winds shooting out from a quasar at relativistic speeds
- Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783
- Variable Nature of Magnetically-Driven Ultra-Fast Outflows
- Reconnection-driven flares in 3D black hole magnetospheres -- A scenario for hot spots around Sagittarius A*
- The Ultra-Fast Outflow of the Quasar PG 1211+143 as Viewed by Time-Averaged Chandra Grating Spectroscopy
- On the importance of special relativistic effects in modelling ultra-fast outflows
- Statistical Study of Plasmoids associated with post-CME Current Sheet
- Timing evidence in determining the accretion state of the Seyfert galaxy NGC 3783
- Delving into the depths of NGC 3783 with XRISM. I. Kinematic and ionization structure of the highly ionized outflows
- XRISM Spectroscopy of Accretion-Driven Wind Feedback in NGC 4151
- Kinematical properties of coronal mass ejections
- Delving into the depths of NGC 3783 with XRISM II. Cross-calibration of X-ray instruments used in the large, multi-mission observational campaign
- Time-dependent photoionization spectroscopy of the Seyfert galaxy NGC 3783