The nuclear architecture of NGC 4151: on the path toward a universal outflow mechanism in light of NGC 1068

Author:

May D1,Steiner J E1,Menezes R B2,Williams D R A3ORCID,Wang J4

Affiliation:

1. Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, 05508-090 SP, São Paulo, Brazil

2. Centro de Ciências Naturais e humanas, Universidade Federal do ABC, Santo André, 09210-580 SP, Brazil

3. Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK

4. Department of Astronomy, Xiamen University, Fujian 361005, China

Abstract

ABSTRACT We report near-infrared integral field spectroscopic observations of the active galactic nucleus NGC 4151 with archive data from the NIFS-Gemini North Telescope. We have selected best-seeing observations (≲0.3 arcsec) that, allied to our methodology of image processing techniques, show structures with spatial resolution comparable to those of the HST. The intricate outflow of NGC 4151 is revisited in light of the results found for NGC 1068, in a previous work, and a very similar dynamic is found: the low-velocity [Fe ii] emission depicts the glowing walls of an hourglass structure, while the high-velocity gas fills its volume. From this finding, we show that the misalignment between the jet and the NLR is not a projection effect, as previously thought. A molecular outflow is detected for the first time in this galaxy and, just like in NGC 1068, the transition between the molecular and the ionized gas phases comes from the fragmentation of molecular cavity walls into bullets of ionized gas exposed to the central source. Furthermore, it is suggestive that the same geometrical dichotomy between the cones seen in NGC 1068 is found here, with one side, where the cavity is disrupted by the AGN, being more extended than the other. Finally, a new spatial correlation between the high-velocity [Fe ii] and the soft X-ray emission of [Ne ix] is found, which is unexpected given the difference between their ionization potentials.

Funder

Fundação de Amparo à Pesquisa do Estado de São Paulo

Science and Technology Facilities Council

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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1. Modelling molecular clouds and CO excitation in AGN-host galaxies;Monthly Notices of the Royal Astronomical Society;2023-11-27

2. Complex AGN feedback in the Teacup galaxy;Astronomy & Astrophysics;2023-10

3. Outflow densities and ionization mechanisms in the NLRs of the prototypical Seyfert galaxies NGC 1068 and NGC 4151;Monthly Notices of the Royal Astronomical Society;2023-06-12

4. Cold molecular gas outflow encasing the ionized one in the Seyfert galaxy NGC 3281;Monthly Notices of the Royal Astronomical Society;2023-04-13

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