Chandra finds X-ray jets are common in low-power radio galaxies

Details Chandra finds X-ray jets are common in low-power radio galaxies Chandra finds X-ray jets are common in low-power radio galaxies

2001-06-13

arxiv.org/abs/astro-ph/0106246v1

Mon.Not.Roy.Astron.Soc.326:L7,2001

Astronomy and Astrophysics

Astrophysics

5 pages incl 4 figs. Uses mn.sty. Accepted for publication in MNRAS Letters

Scientific paper

10.1046/j.1365-8711.2001.04752.x

We present results for the first three low-power radio galaxies from the B2 bright sample to have been observed with Chandra. Two have kpc-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 10^41 ergs s^-1. These are the first detections of X-ray jets in low-power radio galaxies more distant than Cen A and M 87. The cooling time of the galaxy-scale gas implies mass infall rates of order one solar mass per year. 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 kpc-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. kpc-scale radio jets are detected in the X-ray in ~7 ks exposures with Chandra more readily than in the optical via HST snapshot surveys.

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