Mon. Not. R. Astron. Soc., 326, L7-L12 (2001/September-1)
Chandra finds that X-ray jets are common in low-power radio galaxies.
WORRALL D.M., BIRKINSHAW M. and HARDCASTLE M.J.
Abstract (from CDS):
We present results for the first three low-power radio galaxies from the B2 bright sample to have been observed with Chandra. Two have kiloparsec-scale radio jets, and in both Chandra resolves jet X-ray emission, and detects soft X-ray core emission and an X-ray-emitting galaxy-scale atmosphere of luminosity a few x1041erg.s–1. These are the first detections of X-ray jets in low-power radio galaxies more distant than Centaurus A and M87. The cooling time of the galaxy-scale gas implies mass infall rates of the order of 1M☉yr–1. The gas pressure near the jets is comparable to the minimum pressure in the jets, implying that the X-ray-emitting gas may play an important role in jet dynamics. The third B2 radio galaxy has no kiloparsec-scale radio jet, and here only soft X-ray emission from the core is detected. The ratio of X-ray to radio flux is similar for the jets and cores, and the results favour a synchrotron origin for the emission. Kiloparsec-scale radio jets are detected in the X-ray in ∼7-ks exposures with Chandra more readily than in the optical via Hubble Space Telescope snapshot surveys.
The Royal Astronomical Society