NGC 741 - Mergers and AGN feedback on galaxy group scale

Abstract

Low mass galaxy cluster systems and groups play an essential role in upcoming cosmological studies such as those to be carried out with eROSITA. Though the effects of active galactic nuclei (AGNs) and merging processes are of special importance to quantify biases like selection effects or deviations from hydrostatic equilibrium, they are poorly understood on the galaxy group scale. We present an analysis of recent deep Chandra and XMM-Newton integrations of NGC741, which provides an excellent example of a group with multiple concurrent phenomena: both an old central radio galaxy and a spectacular infalling head-tail source, strongly-bent jets, a 100kpc radio trail, intriguing narrow X-ray filaments, and gas sloshing features. Supported principally by X-ray and radio continuum data, we address the merging history of the group, the nature of the X-ray filaments, the extent of gas stripping from NGC742, the character of cavities in the group, and the roles of the central AGN and infalling galaxy in heating the intra-group medium.

19 pages, 13 figures, accepted

References in corpus (14)

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Cited by in corpus (13)

• Feedback from Active Galactic Nuclei in Galaxy Groups
• LOFAR Observations of X-ray Cavity Systems
• Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities
• Evidence of AGN feedback and sloshing in the X-ray luminous NGC 1550 galaxy group
• VLA Radio Study of a Sample of Nearby X-ray and Optically Bright Early-Type Galaxies
• The GLEAM 4-Jy (G4Jy) Sample: II. Host-galaxy identification for individual sources
• A search for active galactic nuclei in low-mass compact galaxies
• Exploring diffuse radio emission in galaxy clusters and groups with the uGMRT and the SKA
• A new look at old friends. I. Imaging classical radio galaxies with uGMRT and MeerKAT
• Remnants of recent mergers in nearby early-type galaxies and their classification
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey III: South Galactic Pole data release
• Revealing A Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA observations
• Feedback in the merging galaxy group NGC6338