This composite Xray blueradio pink image of the galaxy cluster Abell 400 shows radio jets immersed i

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This composite X-ray (blue)/radio (pink) image of
the galaxy cluster Abell 400 shows radio jets
immersed in a vast cloud of multimillion degree
X-ray emitting gas that pervades the cluster. The
jets emanate from the vicinity of two
supermassive black holes (bright spots in the
image).
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The X-rays observed by Chandra (inset) from the
quasar SDSSp J1306 (or J1306) have taken 12.7
billion light years to reach Earth, only a
billion years less than the estimated
13.7-billion-year age of the Universe.
Surprisingly, in this quasar, which is seen as it
was at an early epoch, the distribution of X-rays
with energy - the X-ray spectrum - is
indistinguishable from that of nearby, older
quasars. The smaller object in the upper left of
the image is a foreground galaxy.
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This is a composite image of Chandra X-ray (blue)
and VLA radio (red) observations showing the
inner 4,000 light years of a magnetized jet in
Centaurus A. Purple regions are bright in both
radio and X-ray. The jet originates from the
vicinity of the supermassive black hole at the
center of the galaxy (lower right hand corner of
the image).
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M87
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M87 close-up
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A composite X-ray (blue), radio (pink and green),
and optical (orange and yellow) image of the
galaxy Centaurus A presents a stunning tableau of
a galaxy in turmoil. A broad band of dust and
cold gas is bisected at an angle by opposing jets
of high-energy particles blasting away from the
supermassive black hole in the nucleus. Two large
arcs of X-ray emitting hot gas were discovered in
the outskirts of the galaxy on a plane
perpendicular to the jets.
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Giant Disk of Cold Gas and Dust Fuels Possible
Black Hole at the Core of NGC 4261
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Wide View of Giant Radio Jet Coming From Spiral
Galaxy 0313-192
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The Hubble Space Telescope's new Advanced Camera
for Surveys (ACS) has provided the clearest view
yet in visible light of the nearby quasar, 3C 273
image at right. Using the new camera's
coronagraph to block the light from the brilliant
central quasar, astronomers discovered that the
quasar's host galaxy is significantly more
complex than had been suggested in previous
observations. Features in the surrounding galaxy
that are normally drowned out by the quasar's
glow now show up clearly. The ACS reveals a
spiral plume wound around the quasar and a red
dust lane. Material in the form of a clump and a
blue arc are shown in the path of a jet that was
blasted from the quasar.
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Energy 6 x 1061 erg
4.2 arcmin
Most powerful radio burst known
Diameter of cavities 200 kpc
Energy sufficient to quench 200 Msol/yr cooling
flow for several Gyrs
McNamara et al. 2005, Nature
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Bubbles overpressured, drive shock. Age 108 yrs

• burst powered by accretion onto a black hole
• equating energy to 0.1 Mc2 yields accreted mass
  3 x 108 Msol

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Left 0.3-1.5 keV unsharp-masked X-ray image
(width 1 0.98 arcsec, width 2 9.8 arcsec).
Regions brighter than average are light, those
fainter are dark. Right Overlay of contours from
H-alpha image.
Fabian et al. 2003