Edmund Hodges-Kluck, Christopher S. Reynolds
NGC 326 is one of the most prominent X- or Z-shaped radio galaxies
(XRGs/ZRGs) and has been the subject of several studies attempting to explain
its morphology through either fluid motions or reorientation of the jet axis.
We examine a 100 ks archival Chandra exposure and find several features
associated with the radio galaxy: a high-temperature front that may indicate a
shock, high-temperature knots around the rim of the radio emission, and a
cavity associated with the eastern wing of the radio galaxy. A reasonable
interpretation of these features in light of the radio data allows us to
reconstruct the history of the AGN outbursts. The active outburst was likely
once a powerful radio source which has since decayed, and circumstantial
evidence favors reorientation as the means to produce the wings. Because of the
obvious interaction between the radio galaxy and the ICM and the wide
separation between the active lobes and wings, we conclude that XRGs are
excellent sources in which to study AGN feedback in galaxy groups by measuring
the heating rates associated with both active and passive heating mechanisms.
View original:
http://arxiv.org/abs/1112.2707
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