Composite false-color image of the quasar jet 3C273, with emission from
radio waves to X-rays extending over more than 100,000 light years. The
black hole itself is to the left of the image. Colors indicate the
wavelength region where energetic particles give off most of their energy:
yellow contours show the radio emission, with denser contours for brighter
emission (data from VLA); blue is for X-rays (Chandra); green for optical
light (Hubble); and red is for infrared emission (Spitzer).
The jet suddenly becomes very bright at A, where the high-energy X-ray
emissions dominate; moving further away from the quasar, progressively
lower-energy emissions dominate. Letters label individual jet features.
Y. Uchiyama, M. Urry, H.-J. Röser, R. Perley, S. Jester