Heating group gas via the supersonic inflation of radio lobes: a deep Chandra observation of 3C 449

Details Heating group gas via the supersonic inflation of radio lobes: a deep Chandra observation of 3C 449 Heating group gas via the supersonic inflation of radio lobes: a deep Chandra observation of 3C 449

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2907k&link_type=abstract

Chandra proposal ID #11800387

Physics

Scientific paper

We propose a 120 ks Chandra/ACIS-S observation of the hot gas around the canonical FRI radio galaxy 3C 449, which is embedded in a 1.5 keV group. An existing short archival observation shows evidence for a strong shock (Mach number 1.5-2.0) around the inner radio lobes. This is supported by the presence of an entropy spike in the gas (Sun et al. 2009). We will confirm the presence of this shock with the proposed observation, and measure the total energy, age, and time averaged power of the outburst. Confirmation of the presence of this strong shock would be the first such example in a group, and conclusively demonstrate that shock heating plays an important role in the thermodynamic evolution of the group gas.

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