prepublication copy - The Department of Astronomy & Astrophysics ...
prepublication copy - The Department of Astronomy & Astrophysics ...
prepublication copy - The Department of Astronomy & Astrophysics ...
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FIGURE 2‐12 Upper: Observations <strong>of</strong> a gravitational lens discovered by the Sloan Digital Sky Survey and<br />
re‐observed using the Hubble Space Telescope. Light from a distant blue galaxy (upper right, top) is<br />
deflected by the gravitational field <strong>of</strong> an intervening elliptical galaxy (upper right, center) to give an<br />
image in the form <strong>of</strong> a nearly complete "Einstein ring" (upper right, lower). By analyzing the combined<br />
image (upper left) it is possible to learn about the distribution <strong>of</strong> dark and luminous matter in the<br />
elliptical galaxy as well as create a magnified image <strong>of</strong> the background source galaxy. Credit: Image<br />
credit: X‐ray: NASA/CXC/CfA/M.Markevitch et al.; Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et<br />
al.; Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/D.Clowe et al. Credit: X‐ray:<br />
NASA/CXC/CfA/M.Markevitch et al.; Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.; Lensing<br />
Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/D.Clowe et al. Center: <strong>The</strong> inferred dark matter<br />
distribution in the interacting galaxy cluster 1E 0657‐56 is shown in blue, compared to the measured hot<br />
x‐ray emitting cluster gas in red and the visible light from individual galaxies in the optical image. In this<br />
classic example, the dark matter mass dominates the radiating, baryonic mass. Lower: THINGS survey,<br />
undertaken at the NRAO’s Very‐Large Array (VLA), <strong>of</strong> atomic hydrogen in nearby spiral galaxies, showing<br />
complex and extended gas distributions. Credit: NRAO/AUI and Fabian Walter, E. Brinks, E. de Blok, F.<br />
Bigiel, PREPUBLICATION M. Thornley, and R. COPY—SUBJECT Kennicutt. TO FURTHER EDITORIAL CORRECTION<br />
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