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Title: NGC 741—Mergers and AGN Feedback on a Galaxy-group Scale

Abstract

Low-mass galaxy cluster systems and groups will 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 NGC 741 that 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 100-kpc 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 NGC 742, the character of cavities in the group, and the roles of the central AGN and infalling galaxy in heating the intra-group medium.

Authors:
; ; ;  [1];  [2]; ;  [3];  [4]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. Naval Research Laboratory, 4555 Overlook Avenue SW, Code 7213, Washington, DC 20375 (United States)
  3. School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6140 (New Zealand)
  4. Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411007 (India)
Publication Date:
OSTI Identifier:
22663247
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 845; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EQUILIBRIUM; FEEDBACK; GALAXY CLUSTERS; GALAXY NUCLEI; HYDROSTATICS; INTERACTIONS; MASS; RADIO GALAXIES; STRIPPING; X RADIATION; X-RAY GALAXIES

Citation Formats

Schellenberger, G., Vrtilek, J. M., David, L., O’Sullivan, E., Giacintucci, S., Johnston-Hollitt, M., Duchesne, S. W., and Raychaudhury, S., E-mail: gerrit.schellenberger@cfa.harvard.edu. NGC 741—Mergers and AGN Feedback on a Galaxy-group Scale. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7F2E.
Schellenberger, G., Vrtilek, J. M., David, L., O’Sullivan, E., Giacintucci, S., Johnston-Hollitt, M., Duchesne, S. W., & Raychaudhury, S., E-mail: gerrit.schellenberger@cfa.harvard.edu. NGC 741—Mergers and AGN Feedback on a Galaxy-group Scale. United States. doi:10.3847/1538-4357/AA7F2E.
Schellenberger, G., Vrtilek, J. M., David, L., O’Sullivan, E., Giacintucci, S., Johnston-Hollitt, M., Duchesne, S. W., and Raychaudhury, S., E-mail: gerrit.schellenberger@cfa.harvard.edu. Thu . "NGC 741—Mergers and AGN Feedback on a Galaxy-group Scale". United States. doi:10.3847/1538-4357/AA7F2E.
@article{osti_22663247,
title = {NGC 741—Mergers and AGN Feedback on a Galaxy-group Scale},
author = {Schellenberger, G. and Vrtilek, J. M. and David, L. and O’Sullivan, E. and Giacintucci, S. and Johnston-Hollitt, M. and Duchesne, S. W. and Raychaudhury, S., E-mail: gerrit.schellenberger@cfa.harvard.edu},
abstractNote = {Low-mass galaxy cluster systems and groups will 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 NGC 741 that 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 100-kpc 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 NGC 742, the character of cavities in the group, and the roles of the central AGN and infalling galaxy in heating the intra-group medium.},
doi = {10.3847/1538-4357/AA7F2E},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 845,
place = {United States},
year = {2017},
month = {8}
}