Multi-phase AGN-driven outflow in the NLSy1 IRAS 17020+4544. Unveiling dual-feedback and an energy-conserving ionized outflow with MEGARA/GTC integral field spectroscopy
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| author | Bellocchi, E. Longinotti, A. L. Salomé, Q. de Paz, A. Gil Torres-Papaqui, J. P. Mayya, Divakara Krongold, Y. Castillo-Morales, A. Robleto-Orús, A. Catalán-Torrecilla, C. Vega, O. González, D. Rosa |
| author_facet | Bellocchi, E. Longinotti, A. L. Salomé, Q. de Paz, A. Gil Torres-Papaqui, J. P. Mayya, Divakara Krongold, Y. Castillo-Morales, A. Robleto-Orús, A. Catalán-Torrecilla, C. Vega, O. González, D. Rosa |
| contents | The narrow-line Seyfert 1 (NLSy1) galaxy IRAS~17020+4544 is one of the few known sources exhibiting a multi-phase outflow detected in both highly ionized and molecular gas, consistent with AGN feedback operating in an `energy-conserving' regime. We investigate the properties and kinematics of the warm ionized gas using new optical seeing-limited integral-field spectroscopic observations obtained with MEGARA at the Gran Telescopio Canarias in both low- (R$\sim$6000) and medium-resolution (R$\sim$12000) modes. The H$α$ and [OIII]$λ$5007 emission lines are modeled with multi-Gaussian fitting to characterize the ionized gas kinematics and derive the energetics of the outflow, which we compare with those of the X-ray and molecular phases. Ionization diagnostic diagrams (WHAN, WHaD, and BPT) are used to investigate the dominant ionization mechanism. We detect a fast ionized outflow traced by both H$α$ and [OIII] emission lines, with similar spatial extensions (R$_\mathrm{out}\sim$1 kpc and $\sim$0.5 kpc) and velocities (v$_\mathrm{out}\sim$1460 and 1240 km s$^{-1}$, respectively), as well as a slower ionized outflow (v$_\mathrm{out}\sim$450 km s$^{-1}$) detected in the secondary component of the [OIII] line. The fast outflow follows an `energy-conserving' regime, while the slower component is consistent with a `momentum-driven' regime. The ionized outflows are enclosed within the molecular outflow detected with NOEMA (R$_\mathrm{CO}$=2.8$\pm$0.3 kpc), and the large momentum boosts derived in both phases suggest efficient AGN feedback, likely dominated by radiatively driven winds (quasar-mode) rather than kinetic (jet-driven) processes. Ionization diagnostics suggest that the outflow is mainly AGN-driven, with potential contributions from star formation and shocks. The molecular outflow dominates, with the ionized phase contributing less to the mass and feedback efficiency. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_15738 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multi-phase AGN-driven outflow in the NLSy1 IRAS 17020+4544. Unveiling dual-feedback and an energy-conserving ionized outflow with MEGARA/GTC integral field spectroscopy Bellocchi, E. Longinotti, A. L. Salomé, Q. de Paz, A. Gil Torres-Papaqui, J. P. Mayya, Divakara Krongold, Y. Castillo-Morales, A. Robleto-Orús, A. Catalán-Torrecilla, C. Vega, O. González, D. Rosa Astrophysics of Galaxies The narrow-line Seyfert 1 (NLSy1) galaxy IRAS~17020+4544 is one of the few known sources exhibiting a multi-phase outflow detected in both highly ionized and molecular gas, consistent with AGN feedback operating in an `energy-conserving' regime. We investigate the properties and kinematics of the warm ionized gas using new optical seeing-limited integral-field spectroscopic observations obtained with MEGARA at the Gran Telescopio Canarias in both low- (R$\sim$6000) and medium-resolution (R$\sim$12000) modes. The H$α$ and [OIII]$λ$5007 emission lines are modeled with multi-Gaussian fitting to characterize the ionized gas kinematics and derive the energetics of the outflow, which we compare with those of the X-ray and molecular phases. Ionization diagnostic diagrams (WHAN, WHaD, and BPT) are used to investigate the dominant ionization mechanism. We detect a fast ionized outflow traced by both H$α$ and [OIII] emission lines, with similar spatial extensions (R$_\mathrm{out}\sim$1 kpc and $\sim$0.5 kpc) and velocities (v$_\mathrm{out}\sim$1460 and 1240 km s$^{-1}$, respectively), as well as a slower ionized outflow (v$_\mathrm{out}\sim$450 km s$^{-1}$) detected in the secondary component of the [OIII] line. The fast outflow follows an `energy-conserving' regime, while the slower component is consistent with a `momentum-driven' regime. The ionized outflows are enclosed within the molecular outflow detected with NOEMA (R$_\mathrm{CO}$=2.8$\pm$0.3 kpc), and the large momentum boosts derived in both phases suggest efficient AGN feedback, likely dominated by radiatively driven winds (quasar-mode) rather than kinetic (jet-driven) processes. Ionization diagnostics suggest that the outflow is mainly AGN-driven, with potential contributions from star formation and shocks. The molecular outflow dominates, with the ionized phase contributing less to the mass and feedback efficiency. |
| title | Multi-phase AGN-driven outflow in the NLSy1 IRAS 17020+4544. Unveiling dual-feedback and an energy-conserving ionized outflow with MEGARA/GTC integral field spectroscopy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2603.15738 |