An energetic absorption outflow in QSO J1402+2330: Analysis of DESI observations

TL;DR

This study analyzes a quasar outflow using DESI data, revealing its significant potential impact on galaxy evolution through detailed measurements of its properties and energetics.

Contribution

The paper provides a detailed analysis of a quasar outflow's physical properties and energetics using DESI data, highlighting its role in AGN feedback.

Findings

Outflow is located about 2200 pc from the quasar

Mass outflow rate exceeds 1000 solar masses per year

Kinetic energy output surpasses 5% of Eddington luminosity

Abstract

Context. Quasar outflows play a significant role in the active galactic nucleus (AGN) feedback, impacting the interstellar medium and potentially influencing galaxy evolution. Characterizing these outflows is essential for understanding AGN-driven processes. Aims. We aim to analyze the physical properties of the mini-broad absorption line outflow in quasar J1402+2330 using data from the Dark Energy Spectroscopic Instrument (DESI) survey. We seek to measure the outflows location, energetics, and potential impact on AGN feedback processes. Methods. In the spectrum of J1402+2330, we identify multiple ionic absorption lines, including ground and excited states. We measure the ionic column densities and then use photoionization models to determine the total hydrogen column density and ionization parameter of the outflow. We utilized the population ratio of the excited state to the ground state of N iii and S iv to determine the electron number density. Results. The derived electron number density, combined with the ionization parameter, indicates an outflow distance of approximately 2200 pc from the central source. Having a mass outflow rate of more than one thousand solar masses per year and a kinetic energy output exceeding 5 percent of the Eddington luminosity, this outflow can significantly contribute to AGN feedback. Conclusions. Our findings suggest the absorption outflow in J1402+2330 plays a potentially significant role in AGN feedback processes. This study highlights the value of DESI data in exploring AGN feedback mechanisms.