The ultradense, interacting environment of a dual AGN at z ∼ 3.3 revealed by JWST/NIRSpec IFS

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• Michele Perna (CAB, Madrid)
• Wednesday 17 May 2023, 13:40-14:05
• The Hoyle Lecture Theatre + Zoom .

If you have a question about this talk, please contact Hannah Uebler.

LBQS 0302 -0019 is a blue QSO at z ∼ 3.3, hosting powerful outflows, and residing in a complex environment consisting of an obscured AGN candidate and multiple companions, all within 30 kpc in projection. In this talk I will present the JWST /NIRSpec IFS observations of this complex system. We developed a procedure to correct for the spurious oscillations in NIR Spec single-spaxel spectra, due to the spatial under-sampling of the point spread function. We performed a quasar-host decomposition with the QDeblend3D tools, and used multi-component kinematic decomposition of the optical emission line profiles to infer the physical properties of the emitting gas. We identified i) a low-velocity component possibly tracing a warm rotating disk; ii) a powerful ionised outflow, with an outflow mass rate of ∼10^4 Msun/yr. We also detected eight interacting companion objects close to LBQS 0302 -0019, and confirmed the presence of an obscured AGN at ∼20 kpc of the primary QSO . This work has unveiled with unprecedented detail the complex environment of this dual AGN , which includes nine interacting companions (five of which were previously unknown). Our results support a scenario where mergers can trigger dual AGN , and can be important drivers for rapid early SMBH growth.

This talk is part of the Institute of Astronomy Seminars series.

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