Mass Outflow of the X-ray Emission Line Gas in NGC 4151

Abstract

We have analysed Chandra/High Energy Transmission Gratings spectra of the X-ray emission line gas in the Seyfert galaxy NGC 4151. The zeroth order spectral images show extended H- and He-like O and Ne, up to a distance $r\sim$ 200 pc from the nucleus. Using the 1st order spectra, we measure an average line velocity $\sim -230$ km s${}^{-1}$, suggesting significant outflow of X-ray gas. We generated Cloudy photoionisation models to fit the 1st order spectra. We required three emission-line components, with column density, log$N_H$, and ionisation parameter, log$U$, of 22.5/1.0, 22.5/0.19, and 23.0/-0.50, respectively. To estimate the total mass of ionised gas and the mass outflow rates, we applied the model parameters to fit the zeroth order emission-line profiles of Ne~IX and Ne~X. We determined the total mass of $\approx 5.4\times$ 10${}^5$ M_sun. Assuming the same kinematic profile as that for the [O~III] gas, the peak X-ray mass outflow rate was $\approx 1.8$ M_sun yr${}^{-1}$, at $r\sim 150$ pc. The total mass and mass outflow rates are similar to those determined using [O~III], implying that the X-ray gas is a major outflow component. However, unlike the optical outflows, the X-ray outflow rate does not drop off at $r>$ 100 pc, which suggests that it may have a greater impact on the host galaxy.

19 pages, 12 figures. Accepted for publication in the Monthly Notices of the Royal Astronomical Society

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Cited by in corpus (15)

• AGNIFS survey of local AGN: GMOS-IFU data and outflows in 30 sources
• Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. III. Results for the Seyfert 2 Galaxies Markarian 3, Markarian 78, and NGC 1068
• Hubble Space Telescope Observations of [O~III] Emission in Nearby QSO2s: Physical Properties of the Ionised Outflows
• Investigating the Narrow Line Region Dynamics in Nearby Active Galaxies
• MOKA3D: An innovative approach to 3D gas kinematic modelling. I. Application to AGN ionized outflows
• No Small Scale Radio Jets Here: Multi-Epoch Observations of Radio Continuum Structures in NGC 1068 with the VLBA
• Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-ray Emission
• Outflow densities and ionisation mechanisms in the NLRs of the prototypical Seyfert galaxies NGC 1068 and NGC 4151
• XRISM Spectroscopy of Accretion-Driven Wind Feedback in NGC 4151
• Chemical abundances in Seyfert galaxies X. Sulphur abundance estimates
• Hubble Space Telescope [O III] Emission-Line Kinematics in Two Nearby QSO2s: A Case for X-ray Feedback
• Circumgalactic Medium on the Largest Scales: Detecting X-ray Absorption Lines with Large-Area Microcalorimeters
• Probing AGN-ISM Feedback through Extended X-ray Emission in ESO 137-G034
• Detection and Characterization of Quasi-Periodic Oscillations in Seyfert Galaxy NGC 4151
• Revisiting Disk Winds in Active Galactic Nuclei as an Origin of Cosmic Gamma-ray and Neutrino Backgrounds