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

E. Bellocchi; A. L. Longinotti; Q. Salomé; A. Gil de Paz; J. P. Torres-Papaqui; Divakara Mayya; Y. Krongold; A. Castillo-Morales; A. Robleto-Orús; C. Catalán-Torrecilla; O. Vega; D. Rosa González

arXiv · 2603.15738

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

E. Bellocchi·A. L. Longinotti·Q. Salomé·A. Gil de Paz·J. P. Torres-Papaqui·Divakara Mayya·Y. Krongold·A. Castillo-Morales·A. Robleto-Orús·C. Catalán-Torrecilla·O. Vega·D. Rosa González

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Abstract

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$12000) modes. The H$\alpha$ and [OIII]$\lambda$5007 emission lines are modeled with multi-Gaussian fitting to characterize the ionized gas kinematics and derive the energetics of the outflow, which we compare with those of the X-ray and molecular phases. Ionization diagnostic diagrams (WHAN, WHaD, and BPT) are used to investigate the dominant ionization mechanism. We detect a fast ionized outflow traced by both H$\alpha$ 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.

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E. Bellocchi, A. L. Longinotti, Q. Salomé, A. Gil de Paz, J. P. Torres-Papaqui, Divakara Mayya, Y. Krongold, A. Castillo-Morales, A. Robleto-Orús, C. Catalán-Torrecilla, O. Vega, D. Rosa González. 2026-03-16. 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. https://arxiv.org/abs/2603.15738

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