X-ray and Radio Observations of the Jet--environment Interaction in 3C 123

Details X-ray and Radio Observations of the Jet--environment Interaction in 3C 123 X-ray and Radio Observations of the Jet--environment Interaction in 3C 123

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9605h&link_type=abstract

American Astronomical Society, AAS Meeting #211, #96.05; Bulletin of the American Astronomical Society, Vol. 39, p.900

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a 46.7 ks Chandra observation of the hot intracluster gas associated with the radio galaxy 3C 123, in order to study the energetics of the interaction between the large-scale radio jets emitted from the AGN and the gaseous, X-ray-emitting ICM. We observe large-scale asymmetries in the gas distribution out to 100'' together with smaller scale variations on scales of 20-30''. While gas temperatures on the large scale are well-described by an APEC model with temperature 8 keV, temperatures of the small-scale gaseous regions are described by a similar model with temperature 3 keV. We find that the significant overdensities and underdensities of the intracluster gas on large and small scales are caused by different processes. We calculate the "bubble” enthalpy of a small-scale eastern cavity to be 3 × 1059 ergs per bubble evacuated. We observe a corresponding overdense region which has the same enthalpy in pressure equilibrium with this cavity. We also find that the black hole accretion rate required to evacuate this region is R = 0.05Msunyear-1 per bubble. Our results support the interpretation that there is a large-scale disturbance from equilibrium most likely due to "sloshing” of gas caused by the impact of a subcluster merger, whereas on small scales, the radio outbursts from the AGN have created cavities within the X-ray--emitting gas.

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