Gas sloshing in the intra-group medium of NGC 5044
Minimum credit line: Image courtesy of E. O'Sullivan and ESA. (for details, see Conditions of Use).
Credit: ESA/XMM-Newton, CC BY-SA 3.0 IGO
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| About this Image |
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The image shows the NGC 5044 galaxy group --- the X-ray brightest group in the sky --- viewed in a variety of wavebands from low-frequency radio to X-ray. The galaxies are shown using a combination of WISE infrared, Digitized Sky Survey optical, and Galex near-ultraviolet images. An XMM-Newton EPIC X-ray image (blue) shows the diffuse hot gas halo of the group, in which the galaxies are embedded. The abundance of heavy elements (primarily Iron) in this gas, derived from spectral mapping of the XMM data, is shown in purple. A past tidal interaction with an infalling galaxy has set the group core in motion, "sloshing" along a southeast-northwest (lower left - upper right) axis. The asymmetric abundance distribution is produced by the sloshing; the most Iron-rich gas, which would normally be evenly distributed around the dominant elliptical in the centre of the image, is offset to the northwest (upper right), while an arm of this material extends out along the line of sight, curving round to the southeast to produce the blob of high abundances on the lower left. An old radio jet and lobe, remnants of previous AGN outbursts, are revealed by GMRT radio data, shown in green. These have probably been caught up in the sloshing motion of the hot gas, distorting their shape and perhaps compression and brightening the lobe.
Investigator(s): E. O'Sullivan, L.P. David and J.M. Vrtilek
| For More Information |
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- Visit related website;
http://arxiv.org/abs/1310.2163 - Detailed description of this image
- Query XSA archive for XMM-Newton data in the field of NGC 5044
- Astronomical database entries for NGC 5044;
- Query NED for more images about NGC 5044
- Query SIMBAD for more NGC 5044 data
- For unfamiliar terms, visit the XMM-Newton Astronomical Glossary
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