Oral Presentation

Galactic Outflows in Cluster Environments: A Case Study of Abell 2199

Author(s): Chandan Watts (Indian Institute of Astrophysics, Bengaluru), Sudhanshu Barway (Indian Institute of Astrophysics, Bengaluru), Mousumi Das (Indian Institute of Astrophysics, Bengaluru), Michael Hilker (European Southern Observatory, Germany)

Presenter: Chandan Watts (Indian Institute of Astrophysics, Bengaluru, India)

The impact of cluster environments on galactic outflows remains a crucial yet understudied aspect of galaxy evolution. We present a comprehensive analysis of outflow properties across the non-relaxed galaxy cluster Abell 2199 using spatially resolved spectroscopic data from the MaNGA survey. Abell 2199 (z~0.03) provides a dynamic environment to explore how outflows regulate star formation and offer insights into galaxy evolution within dense environments. Our galaxy sample consists of 41 cluster members, providing unprecedented insights into how AGN and stellar feedback-driven outflows respond to their cluster environment.

Using integral field unit (IFU) observations, we map key emission lines ([OIII]5007A, H-alpha, [NII]6584A) to construct BPT diagnostics, ionization ratio ([NII]/H-alpha) and H-alpha velocity dispersion correlations, and kinematic asymmetry maps. We quantify outflow properties, including w80, w90 parameters, outflow velocity, mass outflow rates, and energy injection rates as functions of cluster-centric distance. Our findings reveal enhanced AGN activity and more substantial outflows near the cluster core, with outflow velocities and asymmetries systematically increasing from star-forming through composite to AGN-host galaxies. Furthermore, we identify a population of LINER-like systems exhibiting anti-correlated ionization-kinematics signatures, suggesting low-momentum ionization of the surrounding medium.

This study demonstrates that cluster environments significantly modulate galactic outflows and shape the evolutionary pathways of cluster galaxies. Building upon these results, we plan to extend our analysis to a larger sample of galaxy clusters using high spatial resolution MUSE-IFU data, which will provide deeper insights into the environmental impact on galactic outflows across diverse cluster dynamical states.