Testing for Shock-Heated X-ray Gas Around Compact Steep Spectrum Radio
  Galaxies
  We present Chandra and XMM-Newton X-ray, VLA radio, and optical observations
of three candidate Compact Steep Spectrum (CSS) radio galaxies. CSS sources are
galactic scale and are presumably driving a shock through the ISM of their host
galaxy. B3 1445+410 is a low excitation emission line CSS radio galaxy with
possibly a hybrid Fanaroff-Riley FRI/II (or Fat Double) radio morphology. The
Chandra observations reveal a point-like source which is well fit with a power
law consistent with emission from a Doppler boosted core. 3C 268.3 is a CSS
broad line radio galaxy whose Chandra data are consistent spatially with a
point source centered on the nucleus and spectrally with a double power-law
model. PKS B1017-325 is a low excitation emission line radio galaxy with a bent
double radio morphology. While from our new spectroscopic redshift, PKS
B1017-325 falls outside the formal definition of a CSS, the XMNM-Newton
observations are consistent with ISM emission with either a contribution from
hot shocked gas or non-thermal jet emission. We compile selected radio and
X-ray properties of the nine bona fide CSS radio galaxies with X-ray detections
so far. We find that 2/9 show X-ray spectroscopic evidence for hot shocked gas.
We note that the counts in the sources are low and the properties of the 2
sources with evidence for hot shocked gas are typical of the other CSS radio
galaxies. We suggest that hot shocked gas may be typical of CSS radio galaxies
due to their propagation through their host galaxies.
