Journal
ASTROPHYSICAL JOURNAL
Volume 722, Issue 2, Pages 1735-1743Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/722/2/1735
Keywords
galaxies: individual (3C 288); galaxies: jets; hydrodynamics; intergalactic medium; X-rays: galaxies: clusters
Categories
Funding
- National Aeronautics and Space Administration [GO8-9111X, NAS8-03060]
- Royal Society
- Science and Technology Facilities Council [ST/G003084/1, ST/G002630/1] Funding Source: researchfish
- STFC [ST/G003084/1, ST/G002630/1] Funding Source: UKRI
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We present results from a 42 ks Chandra/ACIS-S observation of the transitional FR I/FR II radio galaxy 3C 288 at z = 0.246. We detect similar to 3 keV gas extending to a radius of similar to 0.5 Mpc with a 0.5-2.0 keV luminosity of 6.6 x 10(43) erg s(-1), implying that 3C 288 lies at the center of a poor cluster. We find multiple surface brightness discontinuities in the gas indicative of either a shock driven by the inflation of the radio lobes or a recent merger event. The temperature across the discontinuities is roughly constant with no signature of a cool core, thus disfavoring either the merger cold front or sloshing scenarios. We argue therefore that the discontinuities are shocks due to the supersonic inflation of the radio lobes. If they are shocks, the energy of the outburst is similar to 10(60) erg, or roughly 30% of the thermal energy of the gas within the radius of the shock, assuming that the shocks are part of a front produced by a single outburst. The cooling time of the gas is similar to 10(8) yr, so that the energy deposited by the nuclear outburst could have reheated and efficiently disrupted a cool core.
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