Buchumschlag

Fast, dust-poor outflows in the local candidate dual AGN MCG-03-34-64 observed with VLT/ERIS

Fuente: arXiv

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Hauptverfasser:	Lamperti, I., Mannucci, F., Bertola, E., Marconi, A., Cresci, G., Nardini, E., D'Amato, Q., Perna, M., Rojas-Lilayú, A., Bracci, C., Braito, V., Cataldi, E., Ceci, M., Chakraborty, A., Cicone, C., De Rosa, A., Feltre, A., Ginolfi, M., Lusso, E., Marconcini, C., Moreschini, B., Portaluri, E., Rubinur, K., Scialpi, M., Severgnini, P., Tozzi, G., Falcão, A. Trindade, Ulivi, L., Venturi, G., Vignali, C., Zanchettin, M. V.
Format:	Preprint
Veröffentlicht:	2026
Schlagworte:	Astrophysics of Galaxies
Online-Zugang:	Acceder al recurso
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_version_	1866912861292331008
author	Lamperti, I. Mannucci, F. Bertola, E. Marconi, A. Cresci, G. Nardini, E. D'Amato, Q. Perna, M. Rojas-Lilayú, A. Bracci, C. Braito, V. Cataldi, E. Ceci, M. Chakraborty, A. Cicone, C. De Rosa, A. Feltre, A. Ginolfi, M. Lusso, E. Marconcini, C. Moreschini, B. Portaluri, E. Rubinur, K. Scialpi, M. Severgnini, P. Tozzi, G. Falcão, A. Trindade Ulivi, L. Venturi, G. Vignali, C. Zanchettin, M. V.
author_facet	Lamperti, I. Mannucci, F. Bertola, E. Marconi, A. Cresci, G. Nardini, E. D'Amato, Q. Perna, M. Rojas-Lilayú, A. Bracci, C. Braito, V. Cataldi, E. Ceci, M. Chakraborty, A. Cicone, C. De Rosa, A. Feltre, A. Ginolfi, M. Lusso, E. Marconcini, C. Moreschini, B. Portaluri, E. Rubinur, K. Scialpi, M. Severgnini, P. Tozzi, G. Falcão, A. Trindade Ulivi, L. Venturi, G. Vignali, C. Zanchettin, M. V.
contents	We present VLT/ERIS IFU J-band observations of MCG-03-34-64, a nearby (z = 0.0167) Seyfert galaxy hosting a candidate dual AGN system with a separation of ~100 pc between the nuclei. The observations cover, among others, the HeI1.083um, [FeII]1.257um and Pa$β$ emission lines, over a FoV of 3"x3"(~1x1 kpc$^2$). We analyse the ionised gas kinematics and identify two regions with enhanced velocity dispersion (W80~1500 km/s), suggestive of fast outflowing gas, spatially coincident with the position of the two candidate active nuclei. The spectra of the two outflows show a prominent blueshifted wing with velocities vmax ~ -1700 km/s corresponding to the highest 2-5 percentiles of samples of local AGN with similar bolometric luminosities. For the ionised phase of the two outflows, we derive comparable masses of $(4\pm1)\times 10^5$ $M_{\odot}$ and mass outflow rates of $20\pm5$ $M_{\odot}$/yr. The two distinct outflows could be associated with the two nuclei, or be generated by the interaction of the radio jet with the ISM. We also analyse the peculiar profile of the [Fe VII]6087A optical coronal line from an archival VLT/X-shooter spectrum. The comparison with the [NeV]3425A and [FeII]1.257um profiles indicates that [Fe VII] emission likely arises only from the outflow. The absence of the systemic component in [Fe VII] - unlike in [NeV], which has similar ionisation potential and critical density - suggests suppression of [Fe VII] due to iron depletion onto dust grains, while its detection in the outflow implies a lower dust content than in the host ISM. The additional information gained from the ERIS data are consistent with the scenario of a dual AGN, however further observations are required to confirm its nature.
format	Preprint
id	arxiv_https___arxiv_org_abs_2601_22254
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Fast, dust-poor outflows in the local candidate dual AGN MCG-03-34-64 observed with VLT/ERIS Lamperti, I. Mannucci, F. Bertola, E. Marconi, A. Cresci, G. Nardini, E. D'Amato, Q. Perna, M. Rojas-Lilayú, A. Bracci, C. Braito, V. Cataldi, E. Ceci, M. Chakraborty, A. Cicone, C. De Rosa, A. Feltre, A. Ginolfi, M. Lusso, E. Marconcini, C. Moreschini, B. Portaluri, E. Rubinur, K. Scialpi, M. Severgnini, P. Tozzi, G. Falcão, A. Trindade Ulivi, L. Venturi, G. Vignali, C. Zanchettin, M. V. Astrophysics of Galaxies We present VLT/ERIS IFU J-band observations of MCG-03-34-64, a nearby (z = 0.0167) Seyfert galaxy hosting a candidate dual AGN system with a separation of ~100 pc between the nuclei. The observations cover, among others, the HeI1.083um, [FeII]1.257um and Pa$β$ emission lines, over a FoV of 3"x3"(~1x1 kpc$^2$). We analyse the ionised gas kinematics and identify two regions with enhanced velocity dispersion (W80~1500 km/s), suggestive of fast outflowing gas, spatially coincident with the position of the two candidate active nuclei. The spectra of the two outflows show a prominent blueshifted wing with velocities vmax ~ -1700 km/s corresponding to the highest 2-5 percentiles of samples of local AGN with similar bolometric luminosities. For the ionised phase of the two outflows, we derive comparable masses of $(4\pm1)\times 10^5$ $M_{\odot}$ and mass outflow rates of $20\pm5$ $M_{\odot}$/yr. The two distinct outflows could be associated with the two nuclei, or be generated by the interaction of the radio jet with the ISM. We also analyse the peculiar profile of the [Fe VII]6087A optical coronal line from an archival VLT/X-shooter spectrum. The comparison with the [NeV]3425A and [FeII]1.257um profiles indicates that [Fe VII] emission likely arises only from the outflow. The absence of the systemic component in [Fe VII] - unlike in [NeV], which has similar ionisation potential and critical density - suggests suppression of [Fe VII] due to iron depletion onto dust grains, while its detection in the outflow implies a lower dust content than in the host ISM. The additional information gained from the ERIS data are consistent with the scenario of a dual AGN, however further observations are required to confirm its nature.
title	Fast, dust-poor outflows in the local candidate dual AGN MCG-03-34-64 observed with VLT/ERIS
topic	Astrophysics of Galaxies
url	https://arxiv.org/abs/2601.22254